Shallow sowing drip irrigation process for leymus chinensis planting

Abstract

The invention discloses a shallow sowing drip irrigation process for leymus chinensis planting, and belongs to the field of seedling raising. According to the method, the drip irrigation coefficient of each seedling raising cup is determined through the growth condition of leymus chinensis and by taking the growth condition of the leymus chinensis as a constraint condition, the growth condition of the leymus chinensis in the current seedling raising cup is determined according to the drip irrigation coefficient, and when it is judged that the drip irrigation coefficient of the seedling raising cup is larger than the target drip irrigation coefficient, it is judged that the leymus chinensis grows vigorously; otherwise, it is judged that the Leymus chinensis grows abnormally, after the Leymus chinensis grows abnormally, drip irrigation is conducted according to the reference water supply amount, then the drip irrigation coefficient continues to be judged, and when the drip irrigation coefficient of the next period is smaller than or equal to the drip irrigation coefficient of this time, drip irrigation is stopped, and the situation of water waste is avoided. In addition, when it is judged that leymus chinensis in the seedling raising cup grows vigorously, the water supply coefficient of the seedling raising cup is determined according to the soil humidity of the seedling raising cup and the temperature and humidity in the seedling raising chamber, and the water supply coefficient and the drip irrigation coefficient of the seedling raising cup serve as regulation factors.

Description

Technical Field

[0001] The invention relates to seedling cultivation, in particular to a shallow seeding drip irrigation process for planting Leymus chinensis. Background Art

[0002] Leymus chinensis has abundant leaves, high nutritional value, and a pleasant palatability, making it a popular pasture grass for all types of poultry year-round. However, the inherent characteristics of Leymus chinensis seeds result in a low germination rate. A lack of rain or infrequent rainfall after sowing further reduces germination. Therefore, to improve germination and seedling emergence, Leymus chinensis seedlings are often transplanted. During this process, Leymus chinensis seedlings are typically raised in a nursery room, using drip irrigation to promote emergence. However, current drip irrigation methods for Leymus chinensis seedlings often employ a "centralized control and centralized irrigation" approach, which can lead to seedling death or substandard growth, resulting in water waste. Furthermore, different grass seedlings grow and develop differently, making this "centralized control and centralized irrigation" approach prone to uneven watering. This can result in some vigorously growing grass seedlings not receiving regular irrigation, impacting their growth and development. For less vigorous seedlings, overwatering can easily lead to root rot. Summary of the Invention

[0003] Purpose of the invention: The purpose of the present invention is to provide a shallow seeding drip irrigation process for Leymus chinensis cultivation, so as to solve the problem of uneven water supply in the current "unified control and unified irrigation" method.

[0004] Technical solution: A shallow seeding drip irrigation process for Leymus chinensis planting, comprising the following steps: S1, sprinkle a certain amount of Leymus chinensis seeds into the seedling cup, place the seedling cup with the Leymus chinensis seeds on the seedling bed, and then install a drip irrigation device on the seedling cup; S2. Install a humidity sensor on the seedling cup to detect soil moisture, and install a temperature and humidity sensor in the seedling room to detect the temperature and humidity in the seedling room; S3, using the monitoring equipment in the nursery room to photograph the growth of the Leymus chinensis in the nursery cups, and using the CNN recognition algorithm to identify the germination rate in each nursery cup, as well as the change in the growth height of the Leymus chinensis in each nursery cup during each growth cycle; S4. Using the germination rate and the growth height change parameter of each growth cycle as analysis factors and performing normalization processing, thereby obtaining the drip irrigation coefficient of each seedling cup; S5, then comparing the drip irrigation coefficient of each seedling cup with the target drip irrigation coefficient. If the drip irrigation coefficient of the seedling cup is greater than the target drip irrigation coefficient, it is determined that the growth and development of the Leymus chinensis in the seedling cup is good; otherwise, it is determined that the growth and development of the Leymus chinensis in the seedling cup is abnormal; S6. When it is determined that the Leymus chinensis in the seedling cup is growing well, the parameters obtained in step S2 are used as analysis factors and normalized, so as to determine the drip irrigation water supply coefficient of each seedling cup; S7, using the drip irrigation coefficient obtained in step S4 and the drip irrigation water supply coefficient obtained in step S6 as regulating factors, determining the drip irrigation water supply of each seedling cup through the regulating factors and the benchmark water supply, and drip irrigating the sheep grass in the seedling cup through the determined drip irrigation water supply.

[0005] Preferably, the seedbed is divided into three layers, and each layer of the seedbed is provided with seedling cups of different sizes, and the sizes of the seedling cups are 8×8 cm, 10×18 cm, or 15×15 cm.

[0006] Preferably, in the process of obtaining the drip irrigation coefficient of each seedling cup, the germination rate of the Leymus chinensis seeds in each seedling cup and the height change of each growth cycle after germination are used as key analysis factors, and after normalizing the key analysis factors, the drip irrigation coefficient of each seedling cup can be obtained. K d for: ; in, α is the weight coefficient, G r is the current germination rate, β is the growth sensitivity coefficient, H t is the current plant height, H t-1 It is the plant height of the previous cycle.

[0007] Preferably, when it is determined that the sheepgrass in the seedling cup has developed abnormally, water is first supplied at the baseline water supply, and then the drip irrigation coefficient of the seedling cup obtained in the next cycle is compared with the drip irrigation coefficient of the current seedling cup. If the drip irrigation coefficient of the seedling cup in the next cycle is less than or equal to the drip irrigation coefficient of the current seedling cup, stop supplying water to the seedling cup.

[0008] Preferably, in the process of determining the drip irrigation water supply coefficient of each seedling cup, the humidity of the soil in the seedling cup, the temperature and humidity of the seedling room environment are used as key analysis factors, and after normalizing the key analysis factors, the drip irrigation water supply coefficient of each seedling cup can be determined. K w for: ; in, γ is the temperature-humidity coupling coefficient, RH is the ambient relative humidity, T is the ambient temperature, T optThe optimum growth temperature for crops. δ is the soil moisture weight coefficient, θ soil is the volumetric water content of the soil in the seedling cup.

[0009] Preferably, when determining the final drip irrigation water volume in each seedling cup, there are: ; in, Q The final amount of drip irrigation water for each seedling cup is determined. Q base is the standard water supply for drip irrigation, K w is the drip irrigation coefficient, K d The drip irrigation coefficient of each seedling cup is determined; after the final drip irrigation water supply of each seedling cup is determined, the Leymus chinensis in the seedling cup is drip irrigated regularly according to the preset timing program, or the Leymus chinensis in the seedling cup is automatically drip irrigated when the soil moisture detected by the humidity sensor on the seedling cup is lower than the threshold.

[0010] Preferably, the process also includes a remote connection module that can be connected to the terminal device of the manager to achieve human-computer interaction, specifically: the temperature and humidity in the seedling room and the soil moisture information data of the seedling cup can be fed back to the terminal device of the manager, and the manager can control the drip irrigation equipment through the terminal device.

[0011] Beneficial effect: The present invention first determines the drip irrigation coefficient of each seedling cup through the growth condition of sheep fescue, and uses the growth condition of sheep fescue as a constraint condition, and determines the growth condition of sheep fescue in the current seedling cup according to the drip irrigation coefficient. When it is judged that the drip irrigation coefficient of the seedling cup is greater than the target drip irrigation coefficient, it is judged that the sheep fescue is growing vigorously. Otherwise, it is judged that the sheep fescue is growing abnormally. After the sheep fescue grows abnormally, drip irrigation is first performed with a benchmark water supply, and then the drip irrigation coefficient is continued to be judged. When the drip irrigation coefficient of the next cycle is less than or equal to the current drip irrigation coefficient, drip irrigation is stopped at this time to avoid water waste. In addition, when it is determined that the sheep fescue in the seedling cup is growing vigorously, the water supply coefficient of the seedling cup is determined according to the soil moisture of the seedling cup and the temperature and humidity conditions in the seedling room, and the water supply coefficient and the drip irrigation coefficient of the seedling cup are used as regulating factors to regulate the baseline water supply, thereby determining the final drip irrigation water supply of the seedling cup. The drip irrigation water supply can be dynamically determined according to the situation of each seedling cup, avoiding uneven water supply caused by "unified control and unified irrigation", which in turn affects the normal growth of sheep fescue. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a process flow diagram; Figure 2is the relationship diagram between drip coefficient and analysis factor; Figure 3 It is a relationship diagram between drip irrigation water supply coefficient and analysis factors. DETAILED DESCRIPTION

[0013] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] Example:

[0015] like Figure 1 As shown, a shallow seeding drip irrigation process for Leymus chinensis includes: First, a certain number of Leymus chinensis seeds are sown into seedling cups measuring 8×8 cm, 10×18 cm, or 15×15 cm. These seeded cups are then placed on a three-tiered seedling bed. Drip irrigation equipment is then installed on the seedling cups, along with humidity sensors, whose probes are inserted into the soil to monitor soil moisture. A temperature and humidity sensor is also installed in the nursery room to monitor the temperature and humidity. Monitoring equipment is also installed in the nursery room to capture the growth of Leymus chinensis in each seedling bed. A CNN recognition algorithm is used to identify sprouting targets in each seedling cup (the CNN target recognition algorithm is a relatively mature technology, and its technical methods are well known to those skilled in the art, so the specific identification techniques are not detailed here). The number of Leymus chinensis seeds sown in the cups and the number of identified sprouts are used to determine the germination rate of each seedling cup. This also allows for an overview of the changes in the growth height of the Leymus chinensis in each cup during each growth cycle (the growth cycle is set by the management).

[0016] Then, the germination rate of the Leymus chinensis seeds in each seedling cup and the height change of each growth cycle after germination are used as key analysis factors. After normalizing the key analysis factors, the drip irrigation coefficient of each seedling cup can be obtained. K d for: ; in, α is the weight coefficient, which adjusts the weight of the influence of germination rate on water requirement. The coefficient is calibrated through experiments. G r is the current germination rate (number of germinated seeds / total number of seeds). β It is the growth sensitivity coefficient, which is the sensitivity of plant height change to water requirement. This coefficient is calibrated through experiments. H t is the current plant height. H t-1 It is the plant height of the previous cycle.K d The relationship between plant height changes and germination rate is as follows: Figure 2 As shown in (a), after the germination of Leymus chinensis in the seedling cup, the germination rate and plant height change rate increase, indicating that in the growth and development process of Leymus chinensis, the more vigorous the growth, the higher the demand for water. Figure 2 As shown in (b), the greater the germination rate, the greater the change in the drip irrigation coefficient with the increase in the plant height change rate, which further shows that the more vigorous the growth of Leymus chinensis, the higher the demand for water.

[0017] The drip irrigation coefficient of each seedling cup is compared with the target drip irrigation coefficient (the target drip irrigation coefficient is calibrated by the management personnel based on the planting management experience). If the drip irrigation coefficient of the seedling cup is greater than the target drip irrigation coefficient, it is judged that the growth and development of the sheep grass in the seedling cup is good; otherwise, it is judged that the growth and development of the sheep grass in the seedling cup is abnormal. When the sheep grass in the seedling cup is judged to be abnormal, watering is continued at the benchmark water supply, and then the drip irrigation coefficient of the seedling cup obtained in the next cycle is compared with the drip irrigation coefficient of this seedling cup. If the drip irrigation coefficient of the seedling cup in the next cycle is less than or equal to the drip irrigation coefficient of this seedling cup, watering of the seedling cup is stopped.

[0018] When it is judged that the growth of the chinensis in the seedling cup is good, the moisture of the soil in the seedling cup, the temperature and humidity of the seedling room environment are used as key analysis factors. After normalizing the key analysis factors, the drip irrigation water supply coefficient of each seedling cup can be determined. K w for: ; in, γ It is the temperature-humidity coupling coefficient, which is the combined effect of air dryness and temperature on transpiration. The coefficient is calibrated through experiments and the default value is 0.4. RH is the ambient relative humidity. T is the ambient temperature. T opt The optimum growth temperature for crops. δ is the soil moisture weight coefficient, which is the urgency weight of soil water shortage on irrigation. This coefficient is obtained by simulating the soil hydraulic model. θ soil is the volumetric water content of the soil in the seedling cup. K w The relationship between soil moisture, ambient temperature and humidity is as follows: Figure 3 As shown, Figure 3(a) shows that when the ambient humidity is constant, the drip irrigation coefficient gradually increases with the decrease of soil moisture and the increase of ambient temperature. This shows that when the soil moisture is insufficient and the ambient temperature rises, the water in the soil evaporates more. Therefore, it is necessary to increase the drip irrigation coefficient to increase the drip irrigation water supply to ensure the growth and development of Leymus chinensis. On the contrary, when the soil moisture is sufficient and the temperature is low, the soil moisture evaporation is low. Therefore, there is no need to increase the drip irrigation coefficient to increase the drip irrigation water supply. Figure 3 (b) shows that under the condition of constant ambient temperature, the drip irrigation coefficient gradually increases with the decrease of soil moisture and ambient humidity, indicating that soil moisture and ambient humidity will jointly affect the drip irrigation coefficient. In addition, under the condition of constant ambient humidity, the change of soil moisture and the drip irrigation coefficient at different temperatures are as follows: Figure 3 (c) As shown. Under the condition of constant soil moisture, the change of ambient temperature and drip irrigation water supply coefficient under different ambient humidity are as follows. Figure 3 (d) shown.

[0019] The above α, β, δ Different values are taken at different growth stages of Leymus chinensis in the seedling cup, as follows:

[0020] Finally, the drip irrigation coefficient and drip irrigation water supply coefficient are used as regulating factors, and the drip irrigation water supply of each seedling cup is determined by the regulating factors and the benchmark water supply. Q : ; in, Q base This is the baseline drip irrigation watering rate. By collaboratively regulating the drip irrigation coefficient and the drip irrigation watering coefficient, we can avoid a single factor dominating the system. For example, when the plant is growing vigorously but the soil is moist, the drip irrigation watering rate will not increase dramatically. Drip irrigation can then be performed regularly according to a pre-set timer, or automatically when the soil moisture detected by the humidity sensor in the seedling cup falls below a threshold.

[0021] Taking the growth of Leymus chinensis in a 10×18 cm seedling cup on the seedling bed as an example, the monitoring data of the Leymus chinensis in the seedling cup on the 10th day (seedling stage) are as follows: G r =85%、H t =12cm, H t-1 =10cm, RH=45%, T=28℃, θ soil =70%、T opt = 25℃、Q base =50ml .

[0022] The drip coefficient of the seedling cup K d for: ; The seedling cup K d =0.605 > Target drip irrigation coefficient 0.45. This indicates that the chinensis in the seedling cup is growing well and vigorously. Then determine the drip irrigation water supply coefficient of the seedling cup K w for: ; Finally, the drip irrigation coefficient K d and drip irrigation coefficient K w Combined with benchmark water supply Q base The final drip irrigation water volume Q of the seedling cup was regulated to be: Q = 0.605 × 0.426 × 50 ≈ 12.9 ml. The drip irrigation water volume of this seedling cup was 12.9 ml, a 74.2% reduction compared to the baseline value. This reflects water conservation optimization when the ambient humidity and soil moisture content are sufficient, avoiding water waste caused by "unified control and unified irrigation" and ensuring uniform water distribution, avoiding the "unified control and unified irrigation" situation where the sheep fescue in the seedling cup, which does not require much water, is overwatered, resulting in poor root breathing and root rot.

[0023] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A shallow seeding drip irrigation process for growing Leymus chinensis, characterized in that: The following steps are involved: S1, sprinkle a certain amount of Leymus chinensis seeds into the seedling cup, place the seedling cup with the Leymus chinensis seeds on the seedling bed, and then install a drip irrigation device on the seedling cup; S2. Install a humidity sensor on the seedling cup to detect soil moisture, and install a temperature and humidity sensor in the seedling room to detect the temperature and humidity in the seedling room; S3, using the monitoring equipment in the nursery room to photograph the growth of the Leymus chinensis in the nursery cups, and using the CNN recognition algorithm to identify the germination rate in each nursery cup, as well as the change in the growth height of the Leymus chinensis in each nursery cup during each growth cycle; S4. Using the germination rate and the growth height change parameter of each growth cycle as analysis factors and performing normalization processing, thereby obtaining the drip irrigation coefficient of each seedling cup; S5, then comparing the drip irrigation coefficient of each seedling cup with the target drip irrigation coefficient. If the drip irrigation coefficient of the seedling cup is greater than the target drip irrigation coefficient, it is determined that the growth and development of the Leymus chinensis in the seedling cup is good; otherwise, it is determined that the growth and development of the Leymus chinensis in the seedling cup is abnormal; S6. When it is determined that the Leymus chinensis in the seedling cup is growing well, the parameters obtained in step S2 are used as analysis factors and normalized, so as to determine the drip irrigation water supply coefficient of each seedling cup; S7, using the drip irrigation coefficient obtained in step S4 and the drip irrigation water supply coefficient obtained in step S6 as regulating factors, determining the drip irrigation water supply of each seedling cup through the regulating factors and the benchmark water supply, and drip irrigating the sheep grass in the seedling cup through the determined drip irrigation water supply.

2. The shallow seeding drip irrigation process for growing Leymus chinensis according to claim 1, characterized in that: The seedbed is divided into three layers, and each layer of the seedbed is provided with seedling cups of different sizes. The sizes of the seedling cups are 8×8cm, 10×18cm or 15×15cm.

3. The shallow seeding drip irrigation process for growing Leymus chinensis according to claim 1, characterized in that: In the process of obtaining the drip irrigation coefficient of each seedling cup, the germination rate of the Leymus chinensis seeds in each seedling cup and the height change of each growth cycle after germination are used as key analysis factors. After normalizing the key analysis factors, the drip irrigation coefficient of each seedling cup can be obtained. K d for: ； in, α is the weight coefficient, G r is the current germination rate, β is the growth sensitivity coefficient, H t is the current plant height, H t-1 It is the plant height of the previous cycle.

4. The shallow seeding drip irrigation process for growing Leymus chinensis according to claim 1, characterized in that: When it is determined that the sheepgrass in the seedling cup is developing abnormally, continue to supply water at the benchmark water supply, and then compare the drip irrigation coefficient of the seedling cup obtained in the next cycle with the drip irrigation coefficient of this seedling cup. If the drip irrigation coefficient of the seedling cup in the next cycle is less than or equal to the drip irrigation coefficient of this seedling cup, stop supplying water to the seedling cup.

5. The shallow seeding drip irrigation process for planting Leymus chinensis according to claim 1, characterized in that: In the process of determining the drip irrigation coefficient in each seedling cup, the soil moisture in the seedling cup, the temperature and humidity of the seedling room environment are used as key analysis factors. After normalizing the key analysis factors, the drip irrigation coefficient of each seedling cup can be determined. K w for: ； in, γ is the temperature-humidity coupling coefficient, RH is the ambient relative humidity, T is the ambient temperature, T opt The optimum growth temperature for crops. δ is the soil moisture weight coefficient, θ soil is the volumetric water content of the soil in the seedling cup.

6. The shallow seeding drip irrigation process for growing Leymus chinensis according to claim 1, characterized in that: When determining the final drip irrigation water volume for each seedling cup, there are: ； in, Q The final amount of drip irrigation water for each seedling cup is determined. Q base is the standard water supply for drip irrigation, K w is the drip irrigation coefficient, K d The drip irrigation coefficient of each seedling cup is determined; after the final drip irrigation water supply of each seedling cup is determined, the Leymus chinensis in the seedling cup is drip irrigated regularly according to the preset timing program, or the Leymus chinensis in the seedling cup is automatically drip irrigated when the soil moisture detected by the humidity sensor on the seedling cup is lower than the threshold.

7. The shallow seeding drip irrigation process for planting Leymus chinensis according to claim 1, characterized in that: The process also includes a remote connection module that can connect to the manager's terminal device to achieve human-computer interaction. Specifically, the temperature and humidity in the seedling room and the soil moisture information data in the seedling cup can be fed back to the manager's terminal device, and the manager can adjust the drip irrigation equipment through the terminal device.

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