A cotton variety screening method, system, electronic device and medium

Abstract

The application discloses a cotton variety screening method and system, electronic equipment and medium, and relates to the technical field of cotton breeding and cultivation. The method comprises the following steps: obtaining a time parameter of rapid growth and development of fruit branches and leaves according to a fruit branch and leaf parameter set of a cotton variety to be screened; obtaining a time parameter of rapid growth and development of cotton bolls according to a cotton boll parameter set of the cotton variety to be screened; obtaining a time parameter of growth and development overlap of the fruit branches and leaves and the cotton bolls according to the time parameters of the rapid growth and development of the fruit branches and leaves and the rapid growth and development of the cotton bolls; screening the cotton varieties to be screened according to the time parameters of the growth and development overlap of the fruit branches and leaves and the cotton bolls of the cotton varieties to be screened to obtain a first screening set; screening the cotton varieties to be screened according to time parameters of dry matter rapid accumulation periods of the fruit branches and leaves and the cotton bolls of the cotton varieties to be screened to obtain a second screening set; and determining an optimal cotton variety according to the two sets. The application can improve the cotton yield.

Description

Technical Field

[0001] This invention relates to the field of cotton breeding and cultivation technology, and in particular to a cotton variety screening method, system, electronic device and medium. Background Technology

[0002] Cotton is the most important economic crop and a vital raw material for the textile industry. Increasing yield per unit area to improve the profitability of cotton farmers has become an inevitable trend for the sustainable development of cotton production.

[0003] Boll weight and number of bolls are fundamental factors in cotton yield. Increasing boll weight and number of bolls is an important way to increase cotton production. However, existing cotton variety selection methods mainly involve planting each variety separately in the field and comparing the growth, plant type, and disease resistance of each variety population from the perspective of cotton population, combined with the population yield at harvest time, to determine the selection of varieties. These methods only select varieties from the perspective of population production and do not address the issue from the perspective of boll weight and number of bolls. Therefore, a method is needed to select varieties from the perspective of boll weight and number of bolls to improve yield. Summary of the Invention

[0004] The purpose of this invention is to provide a cotton variety screening method, system, electronic device, and medium that can increase cotton yield.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] A method for screening cotton varieties, comprising:

[0007] Obtain the set of fruiting branches and leaves parameters for each cotton variety to be screened; the set of fruiting branches and leaves parameters for each cotton variety to be screened includes the length and width of the fruiting branches and leaves at a set position of the cotton variety to be screened, obtained at each sampling time within a first set time period; the first set time period starts with the time when the fruiting branches and leaves at the set position flattens out and ends with the time when the fruiting branches and leaves at the set position stop growing; the set positions corresponding to each cotton variety to be screened are the same.

[0008] For any cotton variety to be screened, the rapid growth and development time parameters of the fruit branches and leaves at a set position of the cotton variety to be screened are obtained according to the set of fruit branch and leaf parameters of the cotton variety to be screened; the time parameters include the start time and the end time.

[0009] Obtain a set of boll parameters for each cotton variety to be screened; the set of boll parameters for a cotton variety to be screened includes the boll length or boll diameter at a set position of the cotton variety to be screened, obtained at each sampling time within a second set time period; the second set time period starts with the boll flowering time at the set position and ends with the boll opening time at the set position.

[0010] For any cotton variety to be screened, the time parameters for the rapid growth and development of the cotton boll at a set position of the cotton variety to be screened are obtained based on the set of cotton boll parameters of the cotton variety to be screened.

[0011] The overlapping time parameters of the growth and development of fruit branches and leaves and cotton bolls at the set position of the cotton variety to be screened are obtained based on the time parameters of the rapid growth and development of fruit branches and leaves and cotton bolls at the set position of the cotton variety to be screened.

[0012] The first screening set is obtained by screening each cotton variety based on the time parameters of the overlap between the growth and development of fruit branches and leaves and cotton bolls at a set location for each cotton variety to be screened.

[0013] Obtain the time parameters of the rapid accumulation period of dry matter in fruit branches, leaves, and bolls at the set location for each cotton variety to be screened;

[0014] The second screening set is obtained by screening each cotton variety based on the time parameters of the rapid accumulation period of dry matter in the fruit branches, leaves and bolls at the set locations of each cotton variety to be screened.

[0015] The optimal cotton variety is determined based on the first screening set and the second screening set.

[0016] Optionally, obtaining the time parameters for the rapid growth and development of the fruiting branches and leaves at a set location of the cotton variety to be screened based on the set of fruiting branch and leaf parameters specifically includes:

[0017] Based on the set of fruit branch and leaf parameters of the cotton variety to be screened, the relative growth rate of the fruit branch and leaf at the set location of the cotton variety to be screened at each sampling time is obtained.

[0018] The time parameters for the rapid growth and development of the fruit branches and leaves at the designated locations of the cotton variety to be screened are obtained based on the relative growth rate of the fruit branches and leaves at each sampling time.

[0019] Optionally, obtaining the time parameters for rapid growth and development of the cotton bolls at a set location of the cotton variety to be screened, based on the set of cotton boll parameters, specifically includes:

[0020] Based on the set of boll parameters of the cotton variety to be screened, the relative growth rate of the bolls at the set location of the cotton variety to be screened at each sampling time is obtained.

[0021] The time parameters for the rapid growth and development of cotton bolls at the set location of the cotton variety to be screened are obtained based on the relative growth rate of the cotton bolls at each sampling time.

[0022] Optionally, the step of screening each cotton variety to obtain a second screening set based on the time parameters of the rapid accumulation period of dry matter in the fruit branches, leaves, and bolls at a set location for each cotton variety to be screened specifically includes:

[0023] For any cotton variety to be screened, the overlap time of the rapid accumulation period of dry matter of the fruit branches and leaves and the cotton bolls at the set position of the cotton variety to be screened is determined according to the time parameter of the rapid accumulation period of dry matter of the fruit branches and leaves and the cotton bolls at the set position of the cotton variety to be screened.

[0024] The second screening set is obtained by screening each cotton variety based on the overlap time of the rapid accumulation period of dry matter in the fruit branches and leaves and the cotton bolls at the set locations of each cotton variety to be screened.

[0025] Optionally, obtaining the relative growth rate of the fruiting branches and leaves at a set location of the cotton variety to be screened at each sampling time based on the set of fruiting branch and leaf parameters specifically includes:

[0026] For any sampling time, the area of ​​the fruit branches and leaves at the set position of the cotton variety to be screened at the sampling time is obtained based on the length and width of the fruit branches and leaves at the set position of the cotton variety to be screened obtained at the sampling time within the first set time period.

[0027] The relative growth rate of the cotton variety to be screened at the sampling time is obtained based on the area of ​​fruit branches and leaves at the set position of the cotton variety to be screened at the sampling time and the area of ​​fruit branches and leaves at the set position of the cotton variety to be screened at the target time; the target time is the previous sampling time of the sampling time.

[0028] A cotton variety screening system, comprising:

[0029] The fruit branch and leaf parameter acquisition module is used to acquire the fruit branch and leaf parameter set of each cotton variety to be screened; the fruit branch and leaf parameter set of a cotton variety to be screened includes the length and width of the fruit branch and leaf at a set position of the cotton variety to be screened, acquired at each sampling time within a first set time period; the first set time period starts with the time when the fruit branch and leaf at the set position flattens out and ends with the time when the fruit branch and leaf at the set position stops growing; the set position is the same for each cotton variety to be screened.

[0030] The module for determining the rapid growth and development time parameters of fruit branches and leaves is used to obtain the rapid growth and development time parameters of fruit branches and leaves at a set position of cotton to be screened, based on the set of fruit branch and leaf parameters of the cotton to be screened; the time parameters include start time and end time.

[0031] The boll parameter acquisition module is used to acquire the set of boll parameters for each cotton variety to be screened; the set of boll parameters for a cotton variety to be screened includes the boll length or boll diameter at a set position of the cotton variety to be screened, acquired at each sampling time within a second set time period; the second set time period starts with the boll flowering time at the set position and ends with the boll opening time at the set position.

[0032] The boll rapid growth and development time parameter determination module is used to obtain the rapid growth and development time parameters of the boll at a set position of the cotton variety to be screened, based on the set of boll parameters of the cotton variety to be screened.

[0033] The growth and development overlap time parameter determination module is used to obtain the growth and development overlap time parameter of the fruit branches and leaves and the cotton bolls at the set position of the cotton variety to be screened based on the rapid growth and development time parameter of the fruit branches and leaves at the set position of the cotton variety to be screened and the rapid growth and development time parameter of the cotton bolls at the set position of the cotton variety to be screened.

[0034] The first screening set determination module is used to screen each cotton variety to obtain the first screening set based on the time parameters of the overlap between the growth and development of the fruit branches and leaves and the cotton bolls at a set location of each cotton variety to be screened.

[0035] The time parameter acquisition module is used to acquire the time parameters of the rapid accumulation period of dry matter in the fruit branches, leaves and bolls at the set location of each cotton variety to be screened.

[0036] The second screening set determination module is used to screen each cotton variety to obtain a second screening set based on the time parameters of the rapid accumulation period of dry matter in the fruit branches, leaves and bolls at a set location of each cotton variety to be screened.

[0037] The optimal cotton variety determination module is used to determine the optimal cotton variety based on the first screening set and the second screening set.

[0038] Optionally, the module for determining the rapid growth and development time parameters of fruit branches and leaves specifically includes:

[0039] The relative growth rate determination unit for fruit branches and leaves is used to obtain the relative growth rate of fruit branches and leaves at a set location of the cotton variety to be screened at each sampling time based on the set of fruit branch and leaf parameters of the cotton variety to be screened.

[0040] The rapid growth and development time parameter determination unit is used to obtain the rapid growth and development time parameters of the fruit branches and leaves at the set location of the cotton variety to be screened based on the relative growth rate of the fruit branches and leaves at each sampling time.

[0041] Optionally, the cotton boll rapid growth and development time parameter determination module specifically includes:

[0042] The boll relative growth rate determination unit is used to obtain the relative growth rate of the bolls at a set location of the cotton variety to be screened at each sampling time based on the set of boll parameters of the cotton variety to be screened.

[0043] The rapid growth and development time parameter determination unit is used to obtain the rapid growth and development time parameters of the cotton bolls at the set location of the cotton variety to be screened based on the relative growth rate of the cotton bolls at each sampling time.

[0044] An electronic device, comprising:

[0045] A memory and a processor, the memory being used to store a computer program, the processor running the computer program to cause the electronic device to perform the cotton variety screening method as described above.

[0046] A computer-readable storage medium storing a computer program that, when executed by a processor, implements the cotton variety selection method as described above.

[0047] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects: the present invention obtains the optimal cotton variety based on the overlap time of growth and development of cotton bolls and fruiting branches and leaves, as well as the overlap time of biomass accumulation, and selects varieties from the perspective of boll weight and boll number, thereby increasing cotton yield. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a flowchart of a cotton variety screening method provided in an embodiment of the present invention. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0052] Boll weight and number of bolls are fundamental factors constituting cotton yield, and increasing boll weight and number of bolls is an important way to increase cotton production. In reality, cotton has an indeterminate growth habit, with multiple sources and sinks, resulting in a complex source-sink relationship. Almost the entire flowering and boll-forming period is a period of simultaneous vegetative and reproductive growth. The material and energy required for boll growth and development mainly come from the main stem leaves on the same fruiting branch and the fruiting branches and leaves on the same fruiting node. Within the same boll-leaf system, the main stem leaves develop earlier, while budding and budding of fruiting branches and leaves on the same fruiting node occur almost simultaneously. Even 10-15 days after flowering and boll formation, the area of ​​fruiting branch leaves continues to expand. Therefore, for a considerable period, the growth of fruiting branch leaves and boll development are almost synchronous, and there is significant competition between the two for photosynthetic products. Therefore, reducing the time of simultaneous growth of fruiting branch leaves and bolls, and alleviating material competition, may help increase boll formation and promote boll growth, thereby increasing yield. Based on this, this invention provides a cotton variety screening method, such as... Figure 1 As shown, it includes:

[0053] Step 101: Obtain the set of fruit branch and leaf parameters for each cotton variety to be screened; the set of fruit branch and leaf parameters for each cotton variety to be screened includes the length and width of the fruit branch and leaf at a set position of the cotton variety to be screened, obtained at each sampling time within a first set time period; the first set time period starts with the time when the fruit branch and leaf at the set position flattens out and ends with the time when the fruit branch and leaf at the set position stops growing; the set position is the same for each cotton variety to be screened, wherein the set position is the first fruit node of the fruit branch at the same position.

[0054] Step 102: For any cotton variety to be screened, obtain the time parameters of rapid growth and development of the fruit branches and leaves at a set position of the cotton variety to be screened based on the set of fruit branch and leaf parameters of the cotton variety to be screened; the time parameters include the start time and the end time.

[0055] Step 103: Obtain the set of boll parameters for each cotton variety to be screened; the set of boll parameters for a cotton variety to be screened includes the boll length or boll diameter at a set position of the cotton variety to be screened, obtained at each sampling time within a second set time period; the second set time period starts with the boll flowering time at the set position and ends with the boll opening time at the set position.

[0056] Step 104: For any cotton variety to be screened, based on the set of boll parameters of the cotton variety to be screened, obtain the time parameters for the rapid growth and development of the boll at the set position of the cotton variety to be screened.

[0057] Step 105: Based on the time parameters of rapid growth and development of fruit branches and leaves at the set location of the cotton variety to be screened and the time parameters of rapid growth and development of cotton bolls at the set location of the cotton variety to be screened, obtain the time parameters of the overlap between the growth and development of fruit branches and leaves and cotton bolls at the set location of the cotton variety to be screened.

[0058] Step 106: Based on the time parameters of the overlap of the growth and development of the fruit branches and leaves and the cotton bolls at the set positions of each cotton variety to be screened, the cotton varieties to be screened are screened to obtain the first screening set.

[0059] Step 107: Obtain the time parameters of the rapid accumulation period of dry matter in the fruit branches, leaves, and bolls at the set locations for each cotton variety to be screened.

[0060] Step 108: Based on the time parameters of the rapid accumulation period of dry matter in the fruit branches, leaves, and bolls at the set locations of each cotton variety to be screened, a second screening set is obtained by screening each cotton variety to be screened.

[0061] Step 109: Determine the optimal cotton variety based on the first screening set and the second screening set, specifically by taking the intersection of the two sets.

[0062] In practical applications, obtaining the rapid growth and development time parameters of the fruit branches and leaves at a set location of the cotton variety to be screened based on the set of fruit branch and leaf parameters specifically includes:

[0063] Based on the set of fruit and leaf parameters of the cotton variety to be screened, the relative growth rate of the fruit and leaf at the set location of the cotton variety to be screened at each sampling time is obtained.

[0064] The time parameters for the rapid growth and development of the fruit branches and leaves at the designated locations of the cotton variety to be screened are obtained based on the relative growth rate of the fruit branches and leaves at each sampling time.

[0065] In practical applications, obtaining the time parameters for rapid growth and development of cotton bolls at a set location of the cotton variety to be screened, based on the set of cotton boll parameters, specifically includes:

[0066] Based on the set of boll parameters of the cotton variety to be screened, the relative growth rate of the bolls at the set location of the cotton variety to be screened at each sampling time is obtained.

[0067] The time parameters for the rapid growth and development of cotton bolls at the set location of the cotton variety to be screened are obtained based on the relative growth rate of the cotton bolls at each sampling time.

[0068] In practical applications, the process of screening cotton varieties to obtain a second screening set based on the time parameters of the rapid accumulation period of dry matter in the fruit branches, leaves, and bolls at designated locations for each cotton variety to be screened specifically includes:

[0069] For any cotton variety to be screened, the overlap time of the rapid accumulation period of dry matter in the fruit branches and leaves and the cotton bolls at the set location of the cotton variety to be screened is determined based on the time parameter of the rapid accumulation period of dry matter in the fruit branches and leaves and the cotton bolls at the set location of the cotton variety to be screened.

[0070] The second screening set is obtained by screening each cotton variety based on the overlap time of the rapid accumulation period of dry matter in the fruit branches and leaves and the cotton bolls at the set locations of each cotton variety to be screened.

[0071] In practical applications, obtaining the relative growth rate of the fruit branches and leaves at a set location of the cotton variety to be screened at each sampling time based on the set of parameters of the fruit branches and leaves specifically includes:

[0072] For any given sampling time, the area of ​​the fruit branches and leaves at the set location of the cotton variety to be screened at the sampling time is obtained based on the length and width of the fruit branches and leaves at the set location of the cotton variety to be screened obtained at the sampling time within the first set time period.

[0073] The relative growth rate of the cotton variety to be screened at the sampling time is obtained based on the area of ​​fruit branches and leaves at the set position of the cotton variety to be screened at the sampling time and the area of ​​fruit branches and leaves at the set position of the cotton variety to be screened at the target time; the target time is the previous sampling time of the sampling time.

[0074] The present invention provides a more specific embodiment to describe the above method in detail: First, basic information such as planting density, row configuration, and water and fertilizer for cotton planting in the field is obtained, and different varieties of cotton are planted under the same conditions.

[0075] (1) After the cotton enters the budding stage, select the fruiting branch at the same position and mark it when the leaves of the fruiting branch are fully expanded at the first fruiting node (T0). This is also the time when the corresponding bud appears (T0). At this time, use a ruler to measure the length (L0) and width (W0) of the fruiting branch leaves. Calculate the fruiting branch leaf area (A0) using the formula: Fruiting branch leaf area = 0.75 × longest fruiting branch leaf value (L0) × widest fruiting branch leaf value (W0). Measure every few days and record them as (T1, L1), (T2, L2)...(T...). n L n ); (T1, W1), (T2, W2)…(T n W n ); (T1, A1), (T2, A2)…(T n A n ), T n For the nth sampling time, W n L is the width acquired at the nth sampling time. n Let A be the length of the sample collected at the nth sampling time. n Let n be the area of ​​the fruit branch and leaves at the nth sampling time, until the leaf length, leaf width, and leaf area hardly increase (at which point the fruit branch and leaves are considered to have stopped growing). This can be calculated using the formula...

[0076] V n-1→n =(A n -A n-1 ) / (T n -T n-1 The relative growth rate of fruit branches and leaves at each sampling time was obtained, where V n-1→n The relative growth rate between the nth sampling time and the (n-1)th sampling time is the relative growth rate at the nth sampling time. Based on the magnitude of the relative growth rate at each sampling time, the time for rapid development of fruit branches and leaves of each variety after leaf expansion is determined and the corresponding time parameters are recorded. Among them, rapid development is defined as a growth rate that is significantly greater than the continuous growth rate at other stages.

[0077] (2) When the buds on the same fruit node in (1) open white flowers, mark the time using the tagging method. When the cotton bolls open, mark the opening time using the tagging method. Calculate the boll period = opening time - flowering time. During the boll period, measure the boll length and diameter of the cotton bolls every few days and record them as (T1, E1), (T2, E2)...(T... n E n ); (T1, D1), (T2, D2)…(T n D n ), where E n Let D be the bell length collected at the nth sampling time. nThe boll diameter is collected at the nth sampling time, and this process continues until the length and diameter of the cotton boll almost stop increasing (at which point the cotton boll is considered to have stopped growing). Similar to fruit branches and leaves, the relative growth rate of the cotton boll at each sampling time is calculated based on the boll length or boll diameter. For example, if calculated based on the boll length, the formula V is used. n-1→n =(E n -E n-1 ) / (T n -T n-1 Based on the relative growth rate at each sampling time, the time of rapid growth and development of each cotton boll variety after flowering was determined and the corresponding time parameters were recorded.

[0078] (3) Based on the time parameters of rapid expansion of fruit branches and leaves after leaf flattening and the time parameters of rapid growth and development of cotton bolls after flowering, calculate the time parameters of overlapping growth and development of cotton bolls and fruit branches and leaves.

[0079] (4) Cluster analysis was used to classify the time parameters of the overlapping growth and development of cotton bolls and fruit branches and leaves of different cotton varieties. Because the buds need less material before opening white flowers and mainly carry out the vegetative growth of fruit branches and leaves, and after flowering, the cotton bolls need more material supply to maintain boll formation. Therefore, varieties with less overlapping time were selected to obtain the first screening set.

[0080] (5) Reducing the overlap between the growth of fruit branches and leaves and the growth and development of cotton bolls is to alleviate competition for matter. Biomass is the most direct manifestation of photosynthetic production. Therefore, by observing the dynamic changes in biomass during the growth of fruit branches and leaves and cotton bolls, we can determine the growth and development changes of different varieties, clarify the overlap of rapid biomass accumulation, and thus obtain the final results for selecting suitable varieties and improve the accuracy of the results. Therefore, we measured the dry matter accumulation of fruit branches and leaves and the dry matter accumulation of cotton bolls multiple times. The dry matter accumulation conforms to the Logistic growth curve equation, Y = W m / (1+ae -bx ), where x represents the collection time, Y represents the dry matter accumulation, and W m The maximum theoretical biomass content is given by a and b, which are undetermined coefficients, and k is the limiting growth rate. Typically, three pairs of actual observed values ​​satisfying the condition x2 = (x1 + x3) / 2 (i.e., x1, x2, and x3 are equally spaced) are selected: (x1, y1), (x2, y2), and (x3, y3). According to the formula... Determine the k-value. For any variety, a and b are determined after the k-value is determined. Using SPSS software, input all the x and y values ​​corresponding to this variety, and the Logistic growth curve equation is automatically calculated, thus determining the a and b values. Therefore, different varieties will have different a and b coefficients, which are further determined according to the formula... Given Δt = t2 - t1, calculate the start time (t1) and end time (t2) of the rapid biomass accumulation period, the duration of rapid accumulation (Δt), the time of maximum accumulation rate (t0), and the maximum accumulation rate V. m For example, if the start and end times of the rapid accumulation period of fruit and leaf biomass for variety A are 5 days and 15 days after flowering, then the duration of rapid accumulation is 10 days. Conversely, the start and end times of the rapid accumulation period of cotton boll biomass are 10 days and 35 days after flowering, respectively, resulting in a duration of 25 days. The overlapping period of rapid biomass accumulation between these two varieties is 10-15 days after flowering, i.e., an overlap of 5 days. Similarly, other varieties can be investigated and calculated in the same way to determine the length of their rapid biomass accumulation periods and the length of their overlap, allowing for comparison and ultimately obtaining the second selection set.

[0081] (6) Determine the optimal cotton variety based on the first screening set and the second screening set.

[0082] Different varieties of cotton have different developmental periods of vegetative and reproductive growth of leaves and bolls, which affects boll formation. The overlap of their development time leads to competition for nutrients. Reducing the overlap reduces competition for nutrients and helps preserve bolls. This invention screens cotton varieties by analyzing the growth and development of leaves and bolls and changes in dry matter, which can improve yield.

[0083] The present invention also provides an experiment to demonstrate the advantages of the above method:

[0084] 1. Test materials and test site overview:

[0085] Using the early-maturing upland cotton varieties Xinluzao No. 1, Xinluzao No. 7, Xinluzao No. 13, and Xinluzao No. 45, which are widely planted in northern Xinjiang, as experimental materials, a field trial was conducted at the Wulanwusu Town Meteorological Experimental Station in Tacheng Prefecture, Xinjiang Uygur Autonomous Region, for comparative analysis. The previous crop in the experimental field was cotton, the soil was medium loam, and 156 kg of urea and 225 kg of triple-grain phosphate fertilizer were applied per hectare as base fertilizer before sowing.

[0086] 2. Experimental Design:

[0087] Under field conditions, wide-film mulching is used, with the film laid first and then sown. The planting pattern is 6 rows per film, with row spacing of 10cm+66cm+10cm+66cm (wide and narrow rows), plant spacing of 10cm, and a planting density of 240,000 plants per hectare. -2 Sowing was carried out on April 29th, and drip irrigation was applied on April 30th to encourage seedling emergence. Topping was done manually on July 8th. Topdressing was applied during the growing season using drip irrigation, and all field management measures were the same as for high-yield fields irrigated under plastic film.

[0088] 3. Experimental Results and Analysis:

[0089] 3.1 Dynamics of leaf area expansion in fruit-bearing branches and leaves:

[0090] After cotton enters the budding stage, cotton buds and fruiting branches sprout simultaneously. Select a fruiting branch at the same location and mark it when the leaves of the fruiting branch have fully expanded at the first fruiting node. This is also the time when the corresponding bud appears. Measure the length and width of the fruiting branch leaves with a ruler and calculate the leaf area using the formula: Fruiting branch leaf area = 0.75 × longest fruiting branch leaf × widest fruiting branch leaf. Measure every 7 days or so until the leaf length, width, and area hardly increase. The period from the date the fruiting branch leaves fully expand to the date when the leaf length, width, and area hardly increase is defined as the leaf growth period.

[0091] As shown in Table 1, the absolute growth rate of fruit branch and leaf area was fastest for all varieties between 15 and 23 days after leaf expansion. The expansion of fruit branch and leaf area for Xinluzao 13 and Xinluzao 45 mainly occurred before 23 days after leaf expansion, while for Xinluzao 1 and Xinluzao 7, it mainly occurred before 31 days after leaf expansion. Therefore, Xinluzao 13 and Xinluzao 45 completed their rapid fruit branch and leaf growth period approximately 7 days earlier. The trend in boll diameter was similar to that of boll length.

[0092] Table 1. Absolute growth rate of fruiting branch and leaf area of ​​different cotton varieties (cm²) 2 d -1 )

[0093]

[0094] 3.2 Dynamic changes in cotton boll length:

[0095] When the buds on the same fruit node open white flowers, the time is marked using the tagging method. Every 7 days or so, the length and diameter of the cotton boll are measured with a ruler. Similar to the branches and leaves of the same fruit node, the period from the date the cotton boll opens to the date when the length and diameter of the cotton boll hardly increase is defined as the cotton boll growth period.

[0096] As shown in Table 2, the boll length of Xinluzao No. 1 and Xinluzao No. 7 was significantly longer than other varieties 14 days after flowering, but gradually became shorter than the other two varieties from 21 to 28 days after flowering. The boll length of Xinluzao No. 1 and Xinluzao No. 7 almost stopped growing by 21 days after flowering, while the boll length of Xinluzao No. 13 and Xinluzao No. 45 almost stopped growing by 35 days after flowering and had slower growth in the early stages. Therefore, the rapid boll growth period of Xinluzao No. 13 and Xinluzao No. 45 was delayed by about 14 days.

[0097] Table 2. Dynamic changes in boll length of cotton varieties (mm)

[0098]

[0099] 3.3 Equation for the dry matter accumulation of cotton bolls during the growing season:

[0100] The dry matter accumulation of cotton bolls conforms to the Logistic equation, according to the simulation equation Y = W m / (1+ae -bx )Calculate its dynamic growth characteristics during the reproductive period, and further through The calculations using Δt = t2 - t1 determine the start time (t1) and end time (t2), duration of rapid accumulation (Δt), time of maximum accumulation rate (t0), and maximum accumulation rate V of the rapid accumulation period of cotton boll biomass. m .

[0101] As can be seen from Table 3, the t1 and t2 of Xinluzao 13 and Xinluzao 45 are later than those of Xinluzao 1 and Xinluzao 7, and the Δt is also longer. Therefore, the rapid accumulation period of boll biomass of Xinluzao 13 and Xinluzao 45 is delayed, and the overlap time with the growth of fruit branches and leaves is less than that of Xinluzao 1 and Xinluzao 7, and the duration is longer.

[0102] Table 3 Fitting equations and characteristic values ​​for boll biomass accumulation in cotton varieties

[0103]

[0104] 3.4. Boll weight and number of bolls for cotton varieties:

[0105] After the cotton bolls open, 10-20 naturally opened bolls were selected and tagged, and their weight was calculated. For each treatment, 5 points were randomly selected to investigate the total number of plants and bolls at each sampling point, and the number of bolls per plant was calculated.

[0106] As can be seen from Table 4, varieties with a longer period of simultaneous growth of cotton bolls and fruiting branches have lower single boll weight and number of bolls per plant; varieties with a relatively shorter period of simultaneous growth of cotton bolls and fruiting branches, resulting in reduced competition for resources, have higher single boll weight and number of bolls per plant.

[0107] Table 4. Cotton Variety Boll Weight and Number of Bolls

[0108]

[0109] In accordance with the above method, this invention also provides a cotton variety screening system, comprising:

[0110] The fruit branch and leaf parameter acquisition module is used to acquire the fruit branch and leaf parameter set of each cotton variety to be screened; the fruit branch and leaf parameter set of a cotton variety to be screened includes the length and width of the fruit branch and leaf at a set position of the cotton variety to be screened, acquired at each sampling time within a first set time period; the first set time period starts with the time when the fruit branch and leaf at the set position flattens out and ends with the time when the fruit branch and leaf at the set position stops growing; the set position is the same for each cotton variety to be screened.

[0111] The module for determining the rapid growth and development time parameters of fruit branches and leaves is used to obtain the rapid growth and development time parameters of fruit branches and leaves at a set position of any cotton variety to be screened, based on the set of fruit branch and leaf parameters of the cotton variety to be screened; the time parameters include the start time and the end time.

[0112] The boll parameter acquisition module is used to acquire the set of boll parameters for each cotton variety to be screened; the set of boll parameters for a cotton variety to be screened includes the boll length or boll diameter at a set position of the cotton variety to be screened, acquired at each sampling time within a second set time period; the second set time period starts with the boll flowering time at the set position and ends with the boll opening time at the set position.

[0113] The boll rapid growth and development time parameter determination module is used to obtain the rapid growth and development time parameters of the boll at a set position of any cotton variety to be screened, based on the set of boll parameters of the cotton variety to be screened.

[0114] The growth and development overlap time parameter determination module is used to obtain the growth and development overlap time parameters of the fruit branches and leaves and the cotton bolls at the set position of the cotton variety to be screened, based on the rapid growth and development time parameters of the fruit branches and leaves at the set position of the cotton variety to be screened and the rapid growth and development time parameters of the cotton bolls at the set position of the cotton variety to be screened.

[0115] The first screening set determination module is used to screen each cotton variety to obtain the first screening set based on the time parameters of the overlap between the growth and development of the fruit branches and leaves and the cotton bolls at a set location for each cotton variety to be screened.

[0116] The time parameter acquisition module is used to acquire the time parameters of the rapid accumulation period of dry matter in the fruit branches, leaves, and bolls at a set location for each cotton variety to be screened.

[0117] The second screening set determination module is used to screen each cotton variety to obtain a second screening set based on the time parameters of the rapid accumulation period of dry matter in the fruit branches, leaves and bolls at a set location for each cotton variety to be screened.

[0118] The optimal cotton variety determination module is used to determine the optimal cotton variety based on the first screening set and the second screening set.

[0119] As an optional implementation, the module for determining the rapid growth and development time parameters of fruit branches and leaves specifically includes:

[0120] The relative growth rate determination unit for fruit branches and leaves is used to obtain the relative growth rate of fruit branches and leaves at a set location of the cotton variety to be screened at each sampling time, based on the set of parameters of the fruit branches and leaves of the cotton variety to be screened.

[0121] The rapid growth and development time parameter determination unit is used to obtain the rapid growth and development time parameters of the fruit branches and leaves at the set location of the cotton variety to be screened based on the relative growth rate of the fruit branches and leaves at each sampling time.

[0122] As an optional implementation, the cotton boll rapid growth and development time parameter determination module specifically includes:

[0123] The boll relative growth rate determination unit is used to obtain the relative growth rate of the bolls at a set location of the cotton variety to be screened at each sampling time based on the set of boll parameters of the cotton variety to be screened.

[0124] The rapid growth and development time parameter determination unit is used to obtain the rapid growth and development time parameters of the cotton bolls at the set location of the cotton variety to be screened based on the relative growth rate of the cotton bolls at each sampling time.

[0125] The present invention also provides an electronic device, comprising:

[0126] A memory and a processor, the memory being used to store a computer program, the processor running the computer program to cause the electronic device to perform the cotton variety screening method according to the above embodiments.

[0127] The present invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the cotton variety screening method as described in the above embodiments.

[0128] The present invention has the following beneficial effects:

[0129] (1) This invention records the time when white flowers bloom on the same node of a cotton fruiting branch and the time when the white-flowered fruiting branch leaves unfold by tagging. Then, by measuring the changes in the size of the cotton boll and the area of ​​the fruiting branch leaves after flowering, the growth and development of the fruiting branch leaves and cotton bolls are tracked and investigated. Combined with the changes in dry matter accumulation during the growth period, the overlapping time of rapid growth and development of the fruiting branch leaves and cotton bolls is calculated and estimated. Based on the idea of ​​shortening the time of rapid growth and development of cotton bolls and fruiting branch leaves, with the fruiting branch leaves growing first and the rapid development of cotton bolls delayed, the overlapping time of the two is staggered, which alleviates the competition for photosynthetic substances in cotton. In this way, the source leaves can concentrate on supplying cotton boll growth in the middle and late stages, thereby improving the boll setting rate. This provides a reference for cotton variety breeding and cultivation regulation.

[0130] (2) Using the equation Y = W m / (1+ae -bx This allows for a clearer understanding of the growth and development patterns of cotton bolls and enables detailed calculation of the various time points at which cotton boll material accumulates rapidly.

[0131] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0132] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for screening cotton varieties, characterized in that, include: Obtain the set of fruit branch and leaf parameters for each cotton variety to be screened; A set of parameters for the fruit branches and leaves of a cotton variety to be screened includes the length and width of the fruit branches and leaves at a set location of the cotton variety to be screened, obtained at each sampling time within a first set time period; the first set time period begins with the time when the fruit branches and leaves at the set location flatten out and ends with the time when the fruit branches and leaves at the set location stop growing. The settings for each cotton variety to be screened are the same; For any cotton variety to be screened, the rapid growth and development time parameters of the fruit branches and leaves at a set position of the cotton variety to be screened are obtained according to the set of fruit branch and leaf parameters of the cotton variety to be screened; the time parameters include the start time and the end time. Obtain the set of boll parameters for each cotton variety to be screened; A set of boll parameters for a cotton variety to be screened includes the boll length or boll diameter at a set location of the cotton variety to be screened, obtained at each sampling time within a second set time period; the second set time period begins with the boll flowering time at the set location and ends with the boll opening time at the set location. For any cotton variety to be screened, the time parameters for the rapid growth and development of the cotton boll at a set position of the cotton variety to be screened are obtained based on the set of cotton boll parameters of the cotton variety to be screened. The overlapping time parameters of the growth and development of fruit branches and leaves and cotton bolls at the set position of the cotton variety to be screened are obtained based on the time parameters of the rapid growth and development of fruit branches and leaves and cotton bolls at the set position of the cotton variety to be screened. The first screening set is obtained by screening each cotton variety based on the time parameters of the overlap between the growth and development of fruit branches and leaves and cotton bolls at a set location for each cotton variety to be screened. Obtain the time parameters of the rapid accumulation period of dry matter in fruit branches, leaves, and bolls at the set location for each cotton variety to be screened; The second screening set is obtained by screening each cotton variety based on the time parameters of the rapid accumulation period of dry matter in the fruit branches, leaves and bolls at the set locations of each cotton variety to be screened. The optimal cotton variety is determined based on the first screening set and the second screening set.

2. The cotton variety screening method according to claim 1, characterized in that, The step of obtaining the rapid growth and development time parameters of the fruit branches and leaves at a set location of the cotton variety to be screened based on the set of parameters of the fruit branches and leaves specifically includes: Based on the set of fruit branch and leaf parameters of the cotton variety to be screened, the relative growth rate of the fruit branch and leaf at the set location of the cotton variety to be screened at each sampling time is obtained. The time parameters for the rapid growth and development of the fruit branches and leaves at the designated locations of the cotton variety to be screened are obtained based on the relative growth rate of the fruit branches and leaves at each sampling time.

3. The cotton variety screening method according to claim 1, characterized in that, The step of obtaining the rapid growth and development time parameters of the cotton bolls at a set location of the cotton variety to be screened based on the set of cotton boll parameters specifically includes: Based on the set of boll parameters of the cotton variety to be screened, the relative growth rate of the bolls at the set location of the cotton variety to be screened at each sampling time is obtained. The time parameters for the rapid growth and development of cotton bolls at the set location of the cotton variety to be screened are obtained based on the relative growth rate of the cotton bolls at each sampling time.

4. The cotton variety screening method according to claim 1, characterized in that, The second screening set is obtained by screening each cotton variety based on the time parameters of the rapid accumulation period of dry matter in the fruit branches, leaves, and bolls at a set location for each cotton variety to be screened. Specifically, this includes: For any cotton variety to be screened, the overlap time of the rapid accumulation period of dry matter of the fruit branches and leaves and the cotton bolls at the set position of the cotton variety to be screened is determined according to the time parameter of the rapid accumulation period of dry matter of the fruit branches and leaves and the cotton bolls at the set position of the cotton variety to be screened. The second screening set is obtained by screening each cotton variety based on the overlap time of the rapid accumulation period of dry matter in the fruit branches and leaves and the cotton bolls at the set locations of each cotton variety to be screened.

5. The cotton variety screening method according to claim 2, characterized in that, The step of obtaining the relative growth rate of the fruit branches and leaves at a set location of the cotton variety to be screened at each sampling time based on the set of parameters of the fruit branches and leaves specifically includes: For any sampling time, the area of ​​the fruit branches and leaves at the set position of the cotton variety to be screened at the sampling time is obtained based on the length and width of the fruit branches and leaves at the set position of the cotton variety to be screened obtained at the sampling time within the first set time period. The relative growth rate of the cotton variety to be screened at the sampling time is obtained based on the area of ​​fruit branches and leaves at the set position of the cotton variety to be screened at the sampling time and the area of ​​fruit branches and leaves at the set position of the cotton variety to be screened at the target time; the target time is the previous sampling time of the sampling time.

6. A cotton variety screening system, characterized in that, include: The fruit and leaf parameter acquisition module is used to acquire the set of fruit and leaf parameters for each cotton variety to be screened. A set of parameters for the fruit branches and leaves of a cotton variety to be screened includes the length and width of the fruit branches and leaves at a set location of the cotton variety to be screened, obtained at each sampling time within a first set time period; the first set time period begins with the time when the fruit branches and leaves at the set location flatten out and ends with the time when the fruit branches and leaves at the set location stop growing. The settings for each cotton variety to be screened are the same; The module for determining the rapid growth and development time parameters of fruit branches and leaves is used to obtain the rapid growth and development time parameters of fruit branches and leaves at a set position of cotton to be screened, based on the set of fruit branch and leaf parameters of the cotton to be screened; the time parameters include start time and end time. The cotton boll parameter acquisition module is used to obtain the set of cotton boll parameters for each cotton variety to be screened. A set of boll parameters for a cotton variety to be screened includes the boll length or boll diameter at a set location of the cotton variety to be screened, obtained at each sampling time within a second set time period; the second set time period begins with the boll flowering time at the set location and ends with the boll opening time at the set location. The boll rapid growth and development time parameter determination module is used to obtain the rapid growth and development time parameters of the boll at a set position of the cotton variety to be screened, based on the set of boll parameters of the cotton variety to be screened. The growth and development overlap time parameter determination module is used to obtain the growth and development overlap time parameter of the fruit branches and leaves and the cotton bolls at the set position of the cotton variety to be screened based on the rapid growth and development time parameter of the fruit branches and leaves at the set position of the cotton variety to be screened and the rapid growth and development time parameter of the cotton bolls at the set position of the cotton variety to be screened. The first screening set determination module is used to screen each cotton variety to obtain the first screening set based on the time parameters of the overlap between the growth and development of the fruit branches and leaves and the cotton bolls at a set location of each cotton variety to be screened. The time parameter acquisition module is used to acquire the time parameters of the rapid accumulation period of dry matter in the fruit branches, leaves and bolls at the set location of each cotton variety to be screened. The second screening set determination module is used to screen each cotton variety to obtain a second screening set based on the time parameters of the rapid accumulation period of dry matter in the fruit branches, leaves and bolls at a set location of each cotton variety to be screened. The optimal cotton variety determination module is used to determine the optimal cotton variety based on the first screening set and the second screening set.

7. The cotton variety screening system according to claim 6, characterized in that, The module for determining the rapid growth and development time parameters of fruit branches and leaves specifically includes: The relative growth rate determination unit for fruit branches and leaves is used to obtain the relative growth rate of fruit branches and leaves at a set location of the cotton variety to be screened at each sampling time based on the set of fruit branch and leaf parameters of the cotton variety to be screened. The rapid growth and development time parameter determination unit is used to obtain the rapid growth and development time parameters of the fruit branches and leaves at the set location of the cotton variety to be screened based on the relative growth rate of the fruit branches and leaves at each sampling time.

8. The cotton variety screening system according to claim 6, characterized in that, The module for determining the rapid growth and development time parameters of cotton bolls specifically includes: The boll relative growth rate determination unit is used to obtain the relative growth rate of the bolls at a set location of the cotton variety to be screened at each sampling time based on the set of boll parameters of the cotton variety to be screened. The rapid growth and development time parameter determination unit is used to obtain the rapid growth and development time parameters of the cotton bolls at the set location of the cotton variety to be screened based on the relative growth rate of the cotton bolls at each sampling time.

9. An electronic device, characterized in that, include: A memory and a processor, the memory being used to store a computer program, the processor running the computer program to cause the electronic device to perform the cotton variety screening method according to any one of claims 1 to 5.

10. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed by a processor, implements the cotton variety screening method as described in any one of claims 1 to 5.

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