毛乌素沙地不同种植密度玉米农艺性状与产量的相关性和通径分析OA

In order to find the optimal maize planting density and coupling degree of the variety in the special environment of Mu Us Sandy Land,5 different maize varieties were taken as materi-als,and 5 different planting densities were set to conduct correlation and path analysis of agronomic traits and yield,so as to provide scientific basis for high yield and efficient high-quality production of maize.The results showed that:(1)the appropriate planting density of JY308,DH182 and DY606 was 8.25×104 plants⋅hm-2;(2)correlation analysis showed that under different planting density treat-ments,yield was extremely and significantly correlated with grain number per row,broken ear rate,and ear height(P<0.01);(3)path analysis showed that ear height had the greatest direct negative ef-fect on yield,while broken ear rate and lodging rate had a greater direct negative effect on yield.When planting maize in the Mu Us Sandy Land,the number of maize grains per row under low den-sity should be increased,lodging rate under medium to high density should be reduced,reasonable ear position should be maintained and the mutual influence of various agronomic traits should be considered.