不同种植密度对部分早熟玉米新品种产量的影响

采用二因素裂区设计,对黑龙江省种植的10个早熟玉米品种在不同密度条件下的产量进行比较分析.结果表明,10个品种平均产量差异不显著,但品种与密度互作产量差异显著;各品种最高产量密度不同,众德331、绥玉10和绥玉7为5.0~5.5万株·hm-2,绿单1、东农254、登海19、绿单2为7.0~7.5万株·hm-2,哲单37、登海20和德美亚1号为7.5~8.0万株·hm-2;最佳密度下平均单产最高的品种为德美亚1号和东农254.试验结果对我国北方早熟玉米生产中优良品种适宜密度的确定具有指导意义

Effect of different densities on yield of early-maturing maize

In this paper,a split plot of two factors was designed,the yield of 10 early-maturing maizes with different densities was compared.The results showed that the yield difference was not significant among 10 varieties,but the interaction between variety and density was significant,the yield of Zhongde331,Suiyu10 and Suiyu7 was the highest under the density of 50 000-55 000 plants·hm-2;the yield of Lvdan1,Dongong254,Denghai19,and Lvdan2 were the highest under the density of 70 000-75 000 plants·hm-2;the yield of Zhedan37,Denghai20,and Demeiya1 was the highest under the density of 75 000-80 000 plants·hm-2;the mean unit production of Demeiya1 and Dongnong254 was uppermost under the suitable density,it had the important direction meaning for the suitable density confirmation of excellent early-maturing variety in north China.