邢抗6号玉米适宜种植密度研究

Research on the Proper Density of Maize Hybrid Xingkang No.6

采用不同种植密度设计，研究了种植密度对邢抗6号玉米产量及植株性状的影响。结果表明：在设计的3．75万～9．7577株／hm^2种植密度范围内，邢抗6号的产量变化呈二次抛物线关系，6．75万株／hm^2处理产量最高；适宜种植密度为6．3077～6．75万树/hm^2；密度对穗粒数、千粒重和秃顶长度的影响较大，对穗行数影响较小；密度与穗粒数和千粒重均呈线性负相关。

In order to search for the proper density of maize hybrid Xingkang No. 6, the density experiments in two years were conducted in 2002 and 2004. Yield change curve of Xingkang No. 6 shows itself as an approximate positive parabola with the density increase from 37 500 -97 500 plants/hm^2. The proper density of Xingkang No. 6 is from 63 000 plants/hm^2 to 67 500 plants/hm^2. The affect of density on number of kernel per ear, 1000 grain weight and bare top length is greater. Density is negatively correlated with number of kernel per ear and 1 000 grain weight.