摘要
Abstract
[Objective]The seed production yield is an important indicator in the process of corn hybrid seed production,and it has significant practical significance for achieving cost reduction and efficiency improvement,increasing farmers'income,and promoting industrial development.To enhance the seed production yield of corn,a study on the technological model for improving corn seed production yield was conducted.[Method]Taking the seed production experiment of the mid-to-late maturing corn variety'Ningdan No.56'as an example,multiple factor comparative treatments were set up to analyze the relationship between each condition setting and the seed production yield.Different densities(5 500,6 000,6 500 plants/667 m2),row ratios(male parent and female parent ratios are 1∶6,1∶7 and 2∶7),sowing dates(same date for both parents,late sowing by 3 days for the male parent,late sowing by 7 days for the male parent),and planting patterns(whether to cover with plastic film)were set up for multi-factor experiments.A quadratic orthogonal rotation design was adopted to construct a mathematical model for high-yield corn seed production.[Result]Based on the analysis of treatment settings and yield data,a mathematical model for seed production yield was established,and the influence degree of each factor was determined.The results showed that density had the highest contribution rate to the yield,followed by row ratio,planting pattern,and sowing date.The optimized plan is as follows:density of 6 000-6 500 plants/667 m2,row ratio of 1:6,late sowing of the male parent by 7 days,and plastic film planting.[Conclusion]By optimizing the settings of various conditions based on the characteristics of corn inbred lines,the seed production yield can be improved,achieving quality improvement and efficiency enhancement.关键词
玉米制种/产量/数学模型/密度/行比Key words
Corn seed production/Yield/Mathematical model/Density/Row ratio分类
农业科技
