Effects Of Different Planting Densities On Agronomic Characters And Yield Of Three Main Maize Hybrids In Jilin Province

In this experiment,three main maize hybrids were studied in the middle-late maturing maize area of Jilin province,such as Zhengdan958,Xianyu335 and Liangyu99.We set up 4000 plant/mu,4500 plant/mu,5000 plant/mu three planting density,and yield,resistance and agronomic characters were systematically studied.The results show that,with the increasing of planting density,the yield of Zhengdan958 increased continuously;the yield of Xianyu335 increased first and then decreased;the yield of Liangyu99 was also improved continuously.By calculating the correlation coefficient between planting density and average yield,we found that the correlation between yield and planting density varies with maize varieties.By Shukla analysis of variance,it can be found that the difference of maize varieties is the main factor that constitutes the difference of yield.Through the analysis of significant difference of average yield of different varieties,we found that the difference in the average yield of the three cultivars was extremely significant.Through the analysis of the difference significant of the average yield of three maize varieties at different densities,it was found that the differences significant of the average yield of the three varieties were different in the case of increasing planting density.Through the correlation analysis of the main agronomic characters and yield of the three varieties,it is found that there is no obvious rule between different varieties,and the correlation direction and the correlation significance vary with different varieties.On the whole,the yield and stress resistance of the three cultivars were different under different densities,how to choose the right variety and the best planting density should be combined with local condition and specific climate.