高水肥条件下紧凑型玉米杂交种合理群体结构研究  

The Population Structure of Compact Corn Hybrid Grown in High—yielding Field

作　　者：李潮海[1] 石敬之[1] 解贵方 

机构地区：[1]河南农业大学农学系 [2]河南省衣牧厅粮作处

出　　处：《河南农业大学学报》1990年第1期43-48,共6页Journal of Henan Agricultural University

摘　　要：本文利用正交回归旋转设计,以目前生产上推广应用的紧凑型玉米杂交种豫玉2号、豫玉5号为代表,两年在6个试点作了8次群体结构试验。结果表明,在亩产650～700公斤条件下,紧凑型玉米杂交种的适宜种植密度为5000～5500株/亩,最适播种行距为60cm 左右。密度和行距对紧凑型玉米杂交种的植株性状和产量均有较大影响。并指出在当前生产条件下,适当增加种植密度,缩小播种行距是提高紧凑型玉米杂交种产量的重要措施。The population structure of compact corn hybrid Yu Yu 2 and Yu Yu 5 havebeen investigated in six experimental stations in 1988 and 1989 by using the or-thogonal regression gyration design.Results show that plant density and dista-nce between rows exert considerable influence on the yield and plant characte-rs.The desirable stand is 5000～5500 plants per mu and the optimum distancebetween each two rows is 60cm under the yield level of 600～700 kg/mu.In-creasing plant density and reducing row distance adequately are considered a g-ood way to raise the yield.

关 键 词：玉米 杂交种 密植 群体结构 

分 类 号：S513.046[农业科学—作物学]