种植密度对黑龙江省部分晚熟耐密玉米品种产量的影响

选用耐密品种并合理密植是玉米增产的主要途径。以6个玉米品种郑单958、先玉335、吉单261、久龙8号、东农253和京单28号在三种密度下进行产量比较试验。结果表明,吉单261、东农253适宜的种植密度为5.25万株·hm-2;郑单958、先玉335、久龙8号、京单28号适宜种植密度在4.50～6.00万株·hm-2范围内,产量随密度的增加而增加。

Effect on yield of close planting maize variety in different planting densities in late mature of Heilongjiang Province

Reasonable close planting and variety selection are the main approaches to increase maize yield.Yields of six maize varieties were tested in three kinds of densities.The results showed the suitable planting density of Jidan261 and Dongnong253 was 5.25×10~4 plants·hm~(-2),the yields of Zhengdan958,Xianyu335,Jiulong8 and Jingdan28 were increased with the elevation of the density,within the density of 4.50×10~4-6.00×10~4 plants·hm~(-2).