Abstract
In order to test the feasibility of computer simulation in field maize planting, the selection of the method of single seed precise sowing in maize is studied based on the quadratic function model Y = A×(D-Dm)2+Ym, which depicts the relationship between maize yield and planting density. And the advantages and disadvantages of the two planting methods under the condition of single seed sowing are also compared: Method 1 is optimum density planting, while Method 2 is the ideal seedling emergence number planting. It is found that the yield reduction rate and yield fluctuation of Method 2 are all lower than those of Method 1. The yield of Method 2 increased by at least 0.043 t/hm2, and showed more advantages over Method 1 with higher yield level. Further study made on the influence of seedling emergence rate on the yield of maize finds that the yields of the two methods are both highly positively correlated with the seedling emergence rate and the standard deviations of their yields are both highly negatively correlated with the seedling emergence rate. For the study of the break-up problem of sparse caused by the method of single seed precise sowing, the definition of seedling missing spots is put forward. The study found that the relationship between number of hundred-dot spot and field seedling emergence rate is as the parabola function y = -189.32x2 + 309.55x - 118.95 and the relationship between number of spot missing seedling and field seedling emergence rate is as the negative exponent function y = 395.69e-6.144x. The results may help to guide the maize seeds production and single seed precise sowing to some extent.
Highlights
The method of single seed precise sowing is frequently adopted in the process of simplified cultivation of maize, which can greatly reduce the quantity of seeds used and save the trouble of thinning and supplementary planting, less labor force is consumed than that of traditional cultivation management[1]
This paper is to find out the advantages and disadvantages of the two methods (Method 1: number of sowing seeds per hm2 = recommended planting density; method 2: number of sowing seeds per hm2 = recommended planting density/ field seedling emergence rate) which are regularly used in the single seed precise sowing production
Further discussion is made on the problem of sparse breaks up because the field emergence rate can not reach 100% under the case of maize’s single seed precise sowing
Summary
The method of single seed precise sowing is frequently adopted in the process of simplified cultivation of maize, which can greatly reduce the quantity of seeds used and save the trouble of thinning and supplementary planting, less labor force is consumed than that of traditional cultivation management[1]. By adopting the single seed precise sowing, what will the influence of field seedling emergence rate on the yield be like? The field seedling emergence rate, planting density and compensation range of seed yield of planting method can be simulated precisely and the results are precise and objective. The results will be further determined by a field experiment and used to enhance the efficiency of maize cultivation study Based on this consideration, this paper is to find out the advantages and disadvantages of the two methods (Method 1: number of sowing seeds per hm2 = recommended planting density; method 2: number of sowing seeds per hm2 = recommended planting density/ field seedling emergence rate) which are regularly used in the single seed precise sowing production. Further study is made on the comparison of number and stability of the two methods’ yield, field seedling emergence rate’s influence on the number and stability of yield, missing seedling’s yield compensation mode and the distribution rule of the seedling missing spots (number of hundreddot spots and number of spot missing seedlings)
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