化控条件下小麦基本苗密度对产量的效应

EFFECT OF DENSITY OF WINTER WHEAT BASIC SEEDLING ON GRAIN YIELD IN CONDITION OF CHEMICAL MANIPULATION

用半冬性品种济核02为供试材料,研究了化学控制条件下小麦基本苗对产量的效应。结果表明,适期播种条件下,济核02的亩穗数随基本苗的增加而增加。两者呈极显著正相关(r=0.9668);而穗粒数和千粒重则随基本苗的增加而减少。济核02的饱和亩穗数为50万左右,在饱和亩穗数范围内,籽粒产量随亩穗数的增加而增加。本试验条件下,供试品种的最佳亩基本苗为24万。

The effect of density of winter wheat basic seedling on grain yield in condition of chemical manipulation was studied with semi-winter variety Jihe 02. The results were as follows: the ears per mu of Jihe 02 increased, but the grains per ear and the grain weight decreased along with increasing of density of basic seedling in condition of suitable sowing; The saturation ears of Jihe 02 was 500 thousand, below this limit, the grain yield increased along with increasing of ears; The best amount of basic seedling was 240 thousand in this trial; The suitable amount of ears of more-ears varieties and main direction of the offensive in hight yield culture were discussed in this paper.