不同种植密度对玉米品种'安玉308'产量和主要农艺性状的影响OA

To further explore the optimal planting density of'Anyu 308',an experiment was conducted at the Yonghe Experimental Base of Anyang Academy of Agricultural Sciences in 2025.Six planting density gradients were set:60 000,67 500,75 000,82 500,90 000 and 97 500 plants·hm-2.Yield and related agronomic traits were investigated and analyzed.The results showed that with the increase in planting density,the grain yield of'Anyu 308'increased first and then decreased.The highest grain yield of 13 552.43 kg·hm-2 was obtained at 75 000 plants·hm-2.However,the grain yield per plant showed a continuous decreasing trend with increasing planting density.The lodging and root-lodging rate began to increase when the planting density exceeded 75 000 plants·hm-2.Mean-while,plant height increased significantly when the density exceeded 75 000 plants·hm-2,while the stem diameter of the third intern-ode decreased significantly above this density.Statistical analysis indicated that the coefficient of variation of barren tip length was the highest(63.80%),showing the greatest response to planting density.Grain yield per plant was negatively correlated with barren tip length,and positively correlated with ear diameter and kernels per row.In summary,based on multiple comparisons of yield traits and binomial regression analysis,the suitable planting density for'Anyu 308'is determined to be between 75 000 and 82 500 plants·hm-2.