Wide-narrow row cultivation method for corn in fruit forest

Abstract

The invention belongs to the technical field of crop cultivation, and particularly relates to a wide-narrow-row cultivation method for corn in a fruit forest. Wide-narrow row configuration is carried out according to environment characteristics such as illumination angles and illumination duration between fruit-bearing forests, so that the illumination duration is prolonged while the illumination angles are radiated on canopy leaves of corn plants. The planting density of the corn is reasonably set on the basis of a wide-narrow row planting mode, so that the air permeability and photosynthesis of crops in the fruit-bearing forest can be changed, the marginal effect of crop groups is reduced, and the biological competition is reduced, thereby effectively improving the yield and nutritional quality of the corn, and particularly realizing high quality and high yield of the silage corn in the walnut forest.

Description

Technical Field

[0001] The invention belongs to the technical field of crop cultivation, and in particular relates to a method for cultivating wide and narrow rows of corn in orchards. Background Art

[0002] Planting forage grass in walnut forests is a very efficient planting mode that combines fruit and forage. Planting forage crops in forest belts and walnut forests can solve the problem of insufficient forage for animal husbandry to a certain extent.

[0003] Walnuts not only increase farmers' income, but the planting area of ​​walnut forests is also large and continues to increase, which provides more convenient planting conditions for growing forage in walnut forests.

[0004] As a high-quality forage resource, silage corn plays an important role in animal husbandry production. However, with the improvement of corn varieties' tolerance to density, planting density has become one of the main factors determining corn yield. With the increase in planting density, the light interception rate within the group increases, the plants shade each other, the field is closed, and the light transmission conditions deteriorate, which leads to biological competition and insufficient light in the process of planting silage corn in walnut forests, resulting in a decrease in corn yield and nutritional quality. Summary of the invention

[0005] The object of the present invention is to provide a method for cultivating wide and narrow rows of corn between orchards, which can effectively improve the yield and nutritional quality of corn, and the cultivation method is easy to operate and popularize.

[0006] The invention provides a method for cultivating corns between fruit trees. The method adopts a wide-narrow row cultivation mode to plant corns between fruit trees. The planting density of the corns is 5000 to 7000 plants per mu.

[0007] Preferably, the fruit forest includes a walnut forest.

[0008] Preferably, the corn comprises silage corn.

[0009] Preferably, the wide row spacing of the wide and narrow rows is 60 to 80 cm, the narrow row spacing is 30 to 40 cm; and the plant spacing is 20 cm.

[0010] Preferably, the wide row spacing of the wide and narrow rows is 80 cm, and the narrow row spacing is 40 cm; the planting density is 5000 plants / mu.

[0011] Preferably, the wide row spacing of the wide and narrow rows is 75 cm, and the narrow row spacing is 35 cm; the planting density is 6000 plants / mu.

[0012] Preferably, the wide row spacing of the wide and narrow rows is 60 cm, and the narrow row spacing is 30 cm; the planting density is 7000 plants / mu.

[0013] Preferably, the corn variety is a density-tolerant and early-maturing corn variety.

[0014] Preferably, when planting corn, the sowing time is when the temperature of the 5-10 cm stratum is stable at above 10°C; and the sowing method is protective no-till sowing.

[0015] The present invention also provides the application of the cultivation method described in the above technical solution in improving corn yield and / or nutritional quality.

[0016] Beneficial effects:

[0017] The present invention provides a method for cultivating corn in a fruit forest, wherein the corn is planted in the fruit forest by adopting a wide-narrow row cultivation mode, and the planting density of the corn is 5,000 to 7,000 plants per mu. The present invention configures the wide-narrow rows according to the environmental characteristics of the fruit forest, such as the illumination angle and illumination duration, to ensure that the illumination angle is radiated on the canopy leaves of the corn plants while extending the illumination duration. Reasonably setting the planting density of corn on the basis of the wide-narrow row planting mode can change the air permeability and photosynthesis of crops in the fruit forest, reduce the marginal effect of the crop group, and reduce biological competition, thereby effectively improving the yield and nutritional quality of corn, and in particular, can achieve high quality and high yield of silage corn in walnut forests. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments are briefly introduced below.

[0019] Figure 1 This is a schematic side view of a simulation of a traditional equal-row-spacing planting pattern for planting corn in a walnut forest in Example 1;

[0020] Figure 2 This is a front schematic diagram of a simulation of a traditional equal-row-spacing planting pattern for planting corn in a walnut forest in Example 1;

[0021] Figure 3 It is a schematic side view of the simulation of the wide and narrow row planting pattern of corn cultivated in the walnut forest in Example 1;

[0022] Figure 4 It is a front schematic diagram of the simulation of the wide and narrow row planting pattern of corn cultivated in the walnut forest in Example 1;

[0023] Figure 5 Schematic diagram of the seedling stage of each corn cultivation mode in Example 1;

[0024] Figure 6 This is a graph showing the fresh grass yield of corn under different planting modes in Example 1;

[0025] Figure 7 This is a graph showing the corn hay yield results under different planting modes in Example 1;

[0026] Figure 8 This is a graph showing the yield of silage corn under different planting modes in Example 1;

[0027] Fig. 9 To express Figures 1 to 4 Illustration of corn in the middle; Fig.10 To express Figures 1 to 4 Illustration of a walnut tree. DETAILED DESCRIPTION

[0028] The invention provides a method for cultivating corns between fruit trees. The method adopts a wide-narrow row cultivation mode to plant corns between fruit trees. The planting density of the corns is 5000 to 7000 plants per mu.

[0029] As an embodiment, the corn of the present invention is silage corn. As an embodiment, the variety of corn is a dense-tolerant early-maturing corn variety; as another embodiment, the dense-tolerant early-maturing corn variety can be but not limited to "Xinyu 110" or "Xinyu 54"; in a specific embodiment, "Xinyu 110" or "Xinyu 54" produced by Jiushenghe Seed Co., Ltd. is used. The present invention uses early-maturing dense-tolerant corn seeds, which have a compact plant shape, upward-facing leaves, tough stems, developed root systems, and a plant height of about 230 to 260 cm. The planting mode of wide and narrow rows is combined to increase ventilation, light transmission, and photosynthesis, giving play to group advantages.

[0030] As an embodiment, the present invention air-dries corn seeds 2 to 3 days before sowing corn; the drying method is not particularly limited, and the conventional drying method in the art can be adopted; the purpose of the drying is to evaporate the moisture in the seeds, dry the seed coat, which is beneficial to the air permeability of the seeds, increase the germination rate, and reduce the subsequent seedling replacement work.

[0031] After the corn seeds are dried in the sun, the present invention adopts a wide and narrow row cultivation mode to sow corn between fruit trees. As an embodiment, the fruit forest is a walnut forest. As an embodiment, the wide row spacing of the wide and narrow rows is 60-80 cm, the narrow row spacing is 30-40 cm; the plant spacing is 20 cm. As another embodiment, the wide row spacing of the wide and narrow rows is 80 cm, the narrow row spacing is 40 cm; the planting density is 5000 plants / mu; as another embodiment, the wide row spacing of the wide and narrow rows is 75 cm, the narrow row spacing is 35 cm; the planting density is 6000 plants / mu; as another embodiment, the wide row spacing of the wide and narrow rows is 60 cm, the narrow row spacing is 30 cm; the planting density is 7000 plants / mu. As an embodiment, the spacing between the planting area formed by the wide and narrow rows and the fruit trees is 1-1.5 m; the spacing setting has the effect of avoiding the strong shade area under the canopy of the fruit trees and slowing down the nutrient competition between the fruit trees and the intercropped plants. The arrangement of the width and narrowness of the rows and the density of the present invention can change the air permeability and photosynthesis of corn in the orchard, alleviate the marginal effect in the crop group, reduce biological competition, and achieve high quality and high yield of corn.

[0032] As an embodiment, the sowing time of the present invention is when the temperature of the 5-10 cm layer is stable above 10°C; the sowing method is protective no-till sowing. As an embodiment, the present invention does not apply base fertilizer before sowing.

[0033] After the corn is sown, as an embodiment, the present invention performs fertilization and field management during the planting process of the corn until harvest.

[0034] As an implementation mode, the fertilization method includes: fertilizing three times during the growth period of corn, the first fertilization is at the three-leaf stage of corn, the second fertilization is at the large trumpet stage of corn, and the third fertilization is at the filling stage of corn; the three fertilizations all follow the principle of light seedling fertilizer, heavy ear fertilizer, and clever granular fertilizer. In a specific embodiment, the three fertilizations all use compound fertilizer and / or urea; 10 kg / mu of compound fertilizer containing 17% nitrogen, 17% phosphorus and 17% potassium is applied at the three-leaf stage of corn. 20 kg / mu of compound fertilizer containing 30% nitrogen, 4% phosphorus and 6% potassium and 5 kg / mu of urea are applied at the large trumpet stage of corn; 10 kg / mu of compound fertilizer containing 30% nitrogen, 4% phosphorus and 6% potassium and 5 kg / mu of urea are applied at the filling stage of corn, and 40 ml / mu of corn medium element water-soluble fertilizer is mixed with 30 ml / mu of high chloramine insecticide and sprayed together.

[0035] As an embodiment, the field management of the present invention includes tillage, weeding and insect control. As an embodiment, the tillage includes two tillages; the first tillage period is the four-leaf stage of corn, and the tillage of the first tillage is 10-12 cm; the second tillage is 12 days after the first tillage, and the second tillage is furrowing and ridge formation, and the tillage depth is 14-16 cm; the role of the second tillage is to promote lateral root development and prevent corn lodging. As an embodiment, the weeding of the present invention includes one weeding, specifically by applying herbicides, the application period is the three to five leaf stage of corn, and atrazine herbicides are applied, the application dosage is 100-120 mL / mu, and 30 kg of water is added for foliar spraying. As an embodiment, the atrazine herbicide can be but is not limited to one or more of nitrate atrazine, nitrate sulfonate atrazine, nicotine atrazine and nicotinate. As an embodiment, the insect prevention includes two insect preventions, the first insect prevention is in the trumpet stage, 20% chlorantraniliprole suspension is applied, the application dosage is 15-20mL / mu, and 30kg of water is added for foliar spraying; the second insect prevention is 15 days after the first insect prevention, and the insect repellent is applied in the manner of the first insect prevention, and the spraying of the insect repellent twice can achieve the effect of insect prevention. The present invention does not specifically limit the irrigation method, and the conventional irrigation method in the art can be used.

[0036] As an embodiment, the corn is harvested at the 1 / 2 to 2 / 3 milky stage, that is, the corn kernels are harvested at 1 / 2 or 2 / 3 of the milk line. As an embodiment, the corn is harvested by mowing with stubble 10 to 15 cm above the ground.

[0037] The cultivation method of the present invention can change the air permeability and photosynthesis of crops in the fruit forest, reduce the marginal effect of the crop group, and reduce biological competition, thereby effectively improving the yield and nutritional quality of corn, and especially achieving high-quality and high-yield silage corn in the walnut forest. At the same time, it can fully, reasonably and effectively utilize marginal land, increase the utilization rate of limited arable land, and effectively preserve fertilizer and prevent fertilizer loss. Furthermore, the planting pattern of wide and narrow rows in the fruit forest including the walnut forest is conducive to field management, pest control, and is convenient for inter-cultivation, spraying pesticides and foliar fertilizers. And the cultivation method can be operated by ordinary farmers after training, and the operation method is simple and easy.

[0038] The present invention also provides an application of the cultivation method described in the above technical solution in improving corn yield and / or nutritional quality. As an embodiment, the improving corn yield includes improving the fresh grass yield, hay yield and silage yield of corn. As an embodiment, the improving the nutritional quality of corn includes improving one or more of the starch content, crude protein content, soluble sugar content and relative feeding value of corn.

[0039] In order to further illustrate the present invention, the technical solution provided by the present invention is described in detail below in conjunction with the accompanying drawings and embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0040] Example 1

[0041] A method for planting silage corn in a walnut forest, comprising the following steps:

[0042] 1. Planting test setup:

[0043] Experimental site: In 2023, a walnut intercropping site was selected in the walnut forest of Rewan Village, Hotan Prefecture, with a spacing of 8 meters between walnut trees.

[0044] Experimental varieties: Commonly used early-maturing multiple-sowing variety “Xinyu 110” dual-purpose grain and feed corn.

[0045] The experiment adopted a randomized block design, and set up three treatments according to different planting densities, namely: M1: planting density 7.5W plants / hectare (5000 plants / mu); M2: planting density 9W plants / hectare (6000 plants / mu); M3: planting density 10.5W plants / hectare (7000 plants / mu). Winter wheat was sown without tillage 3-4 days after harvest. The sowing was carried out with a protective no-till seeder to achieve full seedlings in one sowing; the seedling protection rate per mu reached 95%, and the plant spacing was 20cm. The speed of the seeder was controlled at 10 square kilometers per hour during sowing.

[0046] Planting mode: Set four planting modes: traditional equal row spacing M1 (60cm), M2 (55cm), M3 (50cm), adjacent row staggered M1 (60cm), M2 (55cm), M3 (50cm), wide and narrow row M1 (80+40) cm, M2 (75+35) cm, M3 (60+30) cm, one hole three plants M1 (70+50) cm, M2 (60+50) cm, M3 (50+50) cm, each plot area is about 15m 2 (5×3m), each mode with various densities is randomly arranged (as shown in Table 1), among which, the simulation schematic diagram of the traditional equal row spacing planting mode in the walnut forest is shown in Figures 1-2 As shown in the figure, the simulation diagram of the wide and narrow row planting pattern in the walnut forest is as follows Figures 3-4 Seedling stage diagrams of various modes are shown in Figure 5 As shown, each treatment was repeated three times, with a total of 36 plots and a total of 540 m 2 The planting area is 1.5m away from the walnut trees, and a 0.8m buffer zone is set between the areas.

[0047] Field management: Field management uses conservation tillage technology, and only chemical weeding and pest control are required. The first tillage depth is 10-12cm at the 4-leaf stage, and the second tillage depth is 14-16cm after 12 days to promote lateral root development and prevent corn from lodging; when the weeds have 3-5 leaves, use atrazine herbicides, 100-120mL per mu, diluted with 30kg of water, and spray on the leaves, spray once. In the trumpet stage, apply 15-20mL of 20% chlorantraniliprole suspension per mu, diluted with 30kg of water and spray evenly for prevention and control, and spray again after 15 days to achieve insect control effect.

[0048] Topdressing: Apply 10kg / mu of compound fertilizer containing 17% nitrogen, 17% phosphorus and 17% potassium at the three-leaf stage. Apply 20kg / mu of compound fertilizer containing 30% nitrogen, 4% phosphorus and 6% potassium and 5kg / mu of urea at the corn flaring stage; apply 10kg / mu of compound fertilizer containing 30% nitrogen, 4% phosphorus and 6% potassium and 5kg / mu of urea at the corn filling stage, and spray 40ml / mu of corn medium element water-soluble fertilizer mixed with 30ml / mu of chloramine insecticide.

[0049] Harvest: Observe the maturity of corn according to the region, do not harvest too early or too late, harvest when the corn is about 1 / 2 milk line stage. Harvest with corn harvester, and return corn stalks to the field, which plays a role in protecting cultivated land.

[0050] Table 1 Experimental factors and levels

[0051]

[0052] 2. Measurement indicators and methods

[0053] (1) Determination of sample agronomic indicators and yield: During the corn harvest period (milky stage 1 / 2), 10 consecutive corn plants were selected from each plot for measurement of agronomic traits, including plant height, stem diameter, and leaf area. Before the harvest period, the fresh weight of the whole plant, the dry weight of the whole plant, and the ear height were added. During the 1 / 2 milky stage, the yield was measured. The middle two rows of each plot were measured, and the whole plant was cut 10 cm above the ground to measure the fresh weight. Then, 10 plants were randomly selected, and the samples were sterilized at 105°C for 30 min and then dried at 80°C to constant weight. The fresh grass yield and hay yield per unit area of ​​silage corn were calculated based on this. The silage yield was converted based on the dry matter content of 30% of the whole plant.

[0054] (2) Nutritional quality collection and processing: After weighing, the sample in step (1) was evenly crushed and passed through a 0.45 mm sieve to determine the following indicators: crude protein (semi-micro Kjeldahl method), crude fat (near infrared method), neutral detergent fiber, acid detergent fiber (Fan's cellulose content determination method), and starch content (polarimeter method).

[0055] 3. Results and Analysis:

[0056] 1. The results of agronomic traits of corn at different densities under various planting modes in 2023 are shown in Table 2, where different letters indicate significant differences (P<0.05).

[0057] Table 2 Agronomic traits of corn in different densities under different planting modes in 2023

[0058]

[0059]

[0060] 2. The fresh weight, dry weight and yield of corn in various planting patterns at different densities in 2023 are shown in Tables 3 and Figures 6 to 8 As shown, different letters indicate significant differences (P<0.05).

[0061] Table 3 Fresh and dry weight and yield of whole-plant corn in various planting patterns under different densities in 2023

[0062]

[0063] 3. The nutritional quality results of corn in various planting patterns under different densities in 2023 are shown in Table 4, where different letters indicate significant differences (P<0.05).

[0064] Table 4 Nutritional quality of corn in different planting patterns under different densities in 2023

[0065]

[0066]

[0067] 4. The cost structure of local silage corn planting in 2023 is shown in Table 5.

[0068] Table 5 Cost structure of local fruit forest intercropping corn planting in 2023

[0069]

[0070] 5. The economic benefits of various planting patterns of local silage corn in 2023 are shown in Table 6, where different letters indicate significant differences (P<0.05).

[0071] Table 6 Economic benefits of corn in various planting patterns under different densities in 2023

[0072]

[0073]

[0074] From Tables 2 to 6, it can be concluded that the plant height and ear height of wide and narrow rows are lower than those of traditional equal row spacing, the stem thickness is increased, and the lodging resistance is stronger; in addition, the maximum leaf area of ​​wide and narrow rows is significantly increased, photosynthesis is increased, and agronomic traits are improved; at a density of 6000 plants / acre, the water content of single plants in wide and narrow rows is significantly reduced, while the fresh weight is significantly higher than that of traditional equal row planting, indicating that wide and narrow row planting can accumulate more dry matter; the yield index of wide and narrow rows at all densities is significantly higher than that of traditional equal row spacing planting. There is no statistical difference between adjacent row staggered planting and one hole three plants mode in agronomic traits and wide and narrow planting, and the yield is lower than wide and narrow row planting, but there is no statistical difference; at planting densities of 5000 / acre and 6000 plants / acre, the nutritional quality of wide and narrow row planting is significantly improved compared with one hole three plants and adjacent staggered planting, so that the final relative feeding value is significantly higher than the two. The above-mentioned wide and narrow row cultivation method in walnut forests increases the silage yield per hectare by 20% to 25% compared with the traditional corn cultivation equal row model; the medium and pickled content is reduced by 9 to 13% compared with the medium pickled content in the equal row model; the three indicators of starch content, crude protein content and soluble sugar content are increased by 10 to 15% compared with the traditional equal row model.

[0075] 4. Based on the agronomic trait results, yield and nutritional quality indicators under different planting modes at different densities in Tables 2 to 6, the advantages of each planting mode and the indicator system are compared and analyzed, as shown in Table 7.

[0076] Table 7 Index system

[0077]

[0078]

[0079] 4.1CRITIC

[0080] The basic principle of the CRITIC method is to calculate the standard deviation and correlation to obtain the indicator weight. The standard deviation is used to calculate the comparison strength. The larger the standard deviation value, the greater the difference between indicators. The correlation is used to calculate the conflict. If the correlation value is larger, it means that the independence between indicators is lower and the correlation is stronger. j It is the product of contrast intensity and conflict. It indicates the amount of information of the indicator. The larger the value, the more important it is to the indicator system and the higher the weight.

[0081] (1) The dimensions and units of each indicator are different and cannot be directly compared and calculated. Therefore, dimensionless processing is required before calculating the weight of each indicator.

[0082] If for the i-th object, the j-th index is as high as possible, then use the forward processing:

[0083]

[0084] If for the i-th object, the j-th index is as low as possible, then use the inverse process

[0085]

[0086] (2) CRITIC expresses the variability of indicators in the form of standard deviation. j Indicates the standard deviation of the ith indicator. In the CRITIC method, the standard deviation is used to indicate the fluctuation of the internal values ​​of each indicator. The larger the standard deviation, the greater the difference in the value of the indicator, the more information can be displayed, the stronger the evaluation strength of the indicator itself, and the more weight should be assigned to the indicator.

[0087]

[0088] Where σ j is the standard deviation of the j-th indicator, is the mean value of the j-th indicator.

[0089] (3) Contradiction

[0090] The degree of correlation between the indicators can be reflected by contradiction. If there is a positive correlation, it means that the contradiction is smaller. Let the contradiction between indicator j and the other indicators be f j .

[0091]

[0092] Where f j is the contradiction of the jth indicator.

[0093] r ij It represents the correlation coefficient between indicator i and indicator j. Here, the Pearson correlation coefficient is used. The formula is as follows.

[0094]

[0095] Where u li 、u lj are the i-th and j-th indicators in scheme m. is the mean of the i-th and j-th indicators in scheme m.

[0096] (4)T j T represents the amount of information contained in the jth indicator. j The larger it is, the greater the amount of information contained in the j-th evaluation index, and the greater the relative importance of the index.

[0097] T j =σ j f j (6)

[0098] (5) Calculate weight

[0099]

[0100] Where w j is the objective weight of the j-th indicator.

[0101] (6) Calculate weight

[0102]

[0103] Where s i is the final score of each solution, u ij is a dimensionless matrix, w j is the weight of each indicator.

[0104] 4.2 Case Analysis

[0105] By integrating the data in Tables 2 to 6 and the indicator system in Table 7, the overall original data table Table 8 is obtained. In Table 8, E represents equal row spacing, D represents staggered adjacent rows, W represents wide and narrow rows, and T represents three plants in one hole, that is, EM1 represents an equal row spacing planting pattern with a planting density of 5000 plants / mu, and so on. The same applies to the following tables.

[0106] Table 8 Raw data

[0107]

[0108]

[0109] 4.2.1 Using CRITIC to Obtain Weights

[0110] (1) Standardized Matrix

[0111] Using formula (1)-formula (2) in 4.1, the standardized matrix of the data matrix can be obtained, as shown in Table 9.

[0112] Table 9 Standardized matrix of data matrix

[0113] EM1 DM1 WM1 TM1 EM2 DM2 WM2 TM2 EM3 DM3 WM3 TM3 B1 0.5900 0.8068 0.8135 1.0000 0.2092 0.5820 0.6169 0.6944 0.0000 0.3019 0.3442 0.4669 B2 0.3700 0.6191 1.0000 0.7059 0.1550 0.4227 0.4966 0.3855 0.0000 0.2124 0.3230 0.1866 B3 0.5462 0.2803 0.2738 0.0000 0.7730 0.3902 0.3069 0.1129 1.0000 0.6433 0.5845 0.3863 B4 0.4925 0.7972 1.0000 0.7202 0.2537 0.6294 0.9734 0.2964 0.0000 0.2124 0.4729 0.1289 B5 0.4254 0.9342 1.0000 0.8993 0.2386 0.4992 0.5689 0.5485 0.0000 0.1902 0.2672 0.2189 B6 0.8758 0.9539 1.0000 0.8171 0.3481 0.4563 0.6287 0.3965 0.0000 0.1987 0.3085 0.1426 B7 0.6160 0.9397 1.0000 0.8520 0.2743 0.4980 0.5797 0.4564 0.0000 0.1830 0.2720 0.1729 B8 0.0000 0.2193 0.2465 0.2018 0.4505 0.5870 0.6223 0.6102 0.8408 0.9558 1.0000 0.9727 B9 0.0000 0.3423 0.4061 0.2496 0.3210 0.6048 0.7086 0.5521 0.5972 0.8682 1.0000 0.8531 B10 0.0000 0.3423 0.4061 0.2496 0.3210 0.6048 0.7086 0.5521 0.5972 0.8682 1.0000 0.8531 B11 0.0000 0.3423 0.4061 0.2496 0.3210 0.6048 0.7086 0.5521 0.5972 0.8682 1.0000 0.8531 B12 0.7261 0.8654 1.0000 0.2884 0.1147 0.4443 0.6936 0.2827 0.0000 0.1626 0.3217 0.2039 B13 0.6007 0.9573 1.0000 0.5350 0.2393 0.4777 0.6007 0.2769 0.0000 0.1220 0.2346 0.1877 B14 0.1735 0.6715 1.0000 0.5913 0.0358 0.3647 0.8087 0.2620 0.0000 0.1659 0.3933 0.2316 B15 0.4102 0.8690 1.0000 0.7263 0.2057 0.3036 0.7506 0.3294 0.0000 0.2008 0.4334 0.1347 B16 0.4687 0.5342 1.0000 0.9938 0.2754 0.4421 0.8987 0.4989 0.0000 0.2066 0.3405 0.1680 B17 0.3821 0.6825 1.0000 0.8327 0.2563 0.5310 0.9183 0.6963 0.0000 0.1166 0.6621 0.5968 B18 0.6171 0.9032 1.0000 0.4814 0.1544 0.4218 0.6041 0.2445 0.0000 0.1182 0.2428 0.1661

[0114] (2) Contrast, contradiction and information content

[0115] Using formula (3)-formula (6), we can obtain the comparability, contradiction and information content of each indicator, as shown in Table 10.

[0116] Table 10 Comparability, contradiction and information content of each indicator

[0117]

[0118] (3) Weight

[0119] Using formula (7), we can get the objective weight of each indicator, as shown in Table 11.

[0120] Table 11 Objective weights of each indicator

[0121]

[0122]

[0123] (4) Final score

[0124] Using formula (8), we can obtain the weighted aggregation matrix and the final score of each solution, as shown in Table 12 and Table 13 respectively.

[0125] Table 12 Weighted aggregation matrix

[0126] EM1 DM1 WM1 TM1 EM2 DM2 WM2 TM2 EM3 DM3 WM3 TM3 B1 0.0248 0.0340 0.0342 0.0421 0.0088 0.0245 0.0260 0.0292 0.0000 0.0127 0.0145 0.0197 B2 0.0128 0.0215 0.0347 0.0245 0.0054 0.0147 0.0172 0.0134 0.0000 0.0074 0.0112 0.0065 B3 0.0559 0.0287 0.0280 0.0000 0.0791 0.0399 0.0314 0.0115 0.1023 0.0658 0.0598 0.0395 B4 0.0203 0.0329 0.0413 0.0297 0.0105 0.0260 0.0402 0.0122 0.0000 0.0088 0.0195 0.0053 B5 0.0186 0.0409 0.0438 0.0394 0.0104 0.0218 0.0249 0.0240 0.0000 0.0083 0.0117 0.0096 B6 0.0440 0.0479 0.0502 0.0410 0.0175 0.0229 0.0316 0.0199 0.0000 0.0100 0.0155 0.0072 B7 0.0275 0.0419 0.0446 0.0380 0.0122 0.0222 0.0259 0.0204 0.0000 0.0082 0.0121 0.0077 B8 0.0000 0.0239 0.0268 0.0219 0.0490 0.0638 0.0677 0.0664 0.0915 0.1040 0.1088 0.1058 B9 0.0000 0.0273 0.0324 0.0199 0.0256 0.0483 0.0565 0.0441 0.0476 0.0693 0.0798 0.0681 B10 0.0000 0.0273 0.0324 0.0199 0.0256 0.0483 0.0565 0.0441 0.0476 0.0693 0.0798 0.0681 B11 0.0000 0.0273 0.0324 0.0199 0.0256 0.0483 0.0565 0.0441 0.0476 0.0693 0.0798 0.0681 B12 0.0324 0.0387 0.0447 0.0129 0.0051 0.0198 0.0310 0.0126 0.0000 0.0073 0.0144 0.0091 B13 0.0259 0.0413 0.0432 0.0231 0.0103 0.0206 0.0259 0.0120 0.0000 0.0053 0.0101 0.0081 B14 0.0064 0.0249 0.0371 0.0219 0.0013 0.0135 0.0300 0.0097 0.0000 0.0061 0.0146 0.0086 B15 0.0160 0.0340 0.0391 0.0284 0.0080 0.0119 0.0294 0.0129 0.0000 0.0079 0.0170 0.0053 B16 0.0211 0.0240 0.0450 0.0447 0.0124 0.0199 0.0404 0.0224 0.0000 0.0093 0.0153 0.0076 B17 0.0158 0.0282 0.0413 0.0344 0.0106 0.0219 0.0380 0.0288 0.0000 0.0048 0.0274 0.0247 B18 0.0263 0.0386 0.0427 0.0206 0.0066 0.0180 0.0258 0.0104 0.0000 0.0050 0.0104 0.0071

[0127] Table 13 Final scores

[0128] type Score Ranking EM1 0.3480 10 DM1 0.5831 4 WM1 0.6938 1 TM1 0.4823 6 EM2 0.3241 12 DM2 0.5063 5 WM2 0.6547 2 TM2 0.4380 9 EM3 0.3367 11 DM3 0.4786 7 WM3 0.6015 3 TM3 0.4758 8

[0129] From the scores and rankings in Table 13, it can be concluded that compared with other planting patterns, the comprehensive rankings of the three planting patterns WM1 to WM3 are first to third, that is, the wide and narrow row cultivation patterns with planting densities of 5000 plants / mu, 6000 plants / mu and 7000 plants / mu can achieve high yield and high quality when planting silage corn in walnut forests.

[0130] Although the above embodiment describes the present invention in detail, it is only a part of the embodiments of the present invention, not all of the embodiments. People can also obtain other embodiments based on this embodiment without creativity, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A method for cultivating corn in orchards, characterized in that: A wide-narrow row cultivation mode is adopted to plant corn among the orchards, and the planting density of the corn is 5000 to 7000 plants per mu.

2. The cultivation method according to claim 1, characterized in that The fruit forest includes a walnut forest.

3. The cultivation method according to claim 1, characterized in that The corn includes silage corn.

4. The cultivation method according to any one of claims 1 to 3, characterized in that: The wide row spacing of the wide and narrow rows is 60-80 cm, the narrow row spacing is 30-40 cm, and the plant spacing is 20 cm.

5. The cultivation method according to claim 4, characterized in that: The wide row spacing of the wide and narrow rows is 80 cm, and the narrow row spacing is 40 cm; the planting density is 5000 plants / mu.

6. The cultivation method according to claim 4, characterized in that: The wide row spacing of the wide and narrow rows is 75 cm, and the narrow row spacing is 35 cm; the planting density is 6000 plants / mu.

7. The cultivation method according to claim 4, characterized in that: The wide row spacing of the wide and narrow rows is 60 cm, and the narrow row spacing is 30 cm; the planting density is 7000 plants / mu.

8. The cultivation method according to claim 1 or 3, characterized in that: The corn variety is a high density tolerant and early maturing corn variety.

9. The cultivation method according to claim 1, characterized in that: When planting corn, the sowing time is when the temperature of the 5-10 cm layer is stable above 10° C.; the sowing method is protective no-till sowing.

10. Use of the cultivation method according to any one of claims 1 to 9 in improving corn yield and / or nutritional quality.

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