Abstract:

Abstract：In order to determine the rational soiling density of maize Zhengdan958, and to fully develop yield-increasing effect, we studied the effect of soiling density on yield and related traits variation coefficients in a randomized block design in Linfen, Shanxi Province. The results show that there are difference in grain yield, 1000- kernel weight, spike length, spike diameter and spike weight among different soiling densities in normal summer rainfall year, but kernel productivity, spike rows and harvest index don′t exist difference. The influence order of soiling density on related traits variation coefficients is spike weight > grain weight > 1000-kernel weight > spike length > spike diameter > spike rows > kernel productive > harvest index. The importance squencing of spike length, spike diameter and spike-stalk weight to spike-grain weight is spike length > spike diameter > spike-stalk weight. Increasing maize soiling density can remarkably enhance grain yield which has synergistic effect with dry matter calculation, and don′t exist significant effect on harvest index. This study provides theory and technology support upon maize soiling density increasing in southern basin of Shanxi.