高产条件下冬小麦产量性状的品种差异及氮肥效应

Varietal Differences of Winter Wheat Yield Components and N-fertilizer Effects in High-yield Condition

通过对 6个冬小麦品种产量性状的品种差异及氮肥效应进行研究 ,结果表明 ,冬小麦产量性状品种间差异显著 ;在高产条件下 ,氮肥的增产效果减弱 ,不同冬小麦品种对氮肥表现出不同的反应特征 ;随着氮肥用量的增加 ,不同品种冬小麦穗数均增加 ,每公顷施 1 80 kg化肥氮 (无有机肥 )时表现最好 ,而后随着氮肥用量的进一步增加而减少。穗粒数与氮肥用量呈现出正相关关系 ,而千粒重一般随氮肥用量的增加而降低 ;氮肥用量增加 。

In high yield condition, we had studied varietal differences and N fertilizer effects on winter wheat yield characteristics using six varieties. The results indicated that there were significant differences in yield characteristics among winter wheat varieties. In high yield condition, the promoted effects of N fertilizer on yield decreased and there were different response characteristics on N fertilizer among winter wheat varieties. Following the amount of N fertilizer added, ear number(EN) of winter wheat all increased, the value was the highest at the amount of 180 kg N/hm 2 (no manure), then following the amount of N fertilizer added further, EN of winter wheat decreased. There was positive correlation relationship between grains per ear with the amount of N fertilizer and negative correlation relationship between 1000 kernel weight with the amount of N fertilizer. Following the amount of N fertilizer added, flowering stage of winter wheat was deferred.