玉米抽雄期干旱胁迫对产量构成因素的影响

The Effect of Water Stress on the Corn Yield Factor at the Teaseling Stage

通过对不同玉米品种在抽雄期受到不同程度干旱胁迫时产量构成因素变化的研究 ,表明 :胁迫强度与各产量构成因素呈负相关 ,随胁迫强度增加 ,各产量构成因素指标值急剧下降。穗长、穗粒数的下降是影响产量的主要因素 ,穗粗、百粒重是影响产量的间接因素。

This article mainly concerned that the regulation of the water stress on the corn kernels yields at the teaselling stage. The results were as follow: At the stage teaselling, there have a prominent negative correlation between the intensity of water stress and the yield factors, the values of yield factor have rapidly descended with the increase of intensity of water stress. The descent of the spike length and the grain number per spike were main factors to induce reduction of output, the spike width and the weight per 100 grain were indirect factors to effect corn yield.