Varietal Differences of Winter Wheat Yield Components and N-fertilizer Effects in High-yield Condition
ZHOU Shun li 1, ZHANG Fu suo 2, WANG Xing ren 2 (1. Dept. of Agronomy, CAU. Beijing 100094; 2. Dept. of Plant Nutrition, CAU. Beijing 100094)
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.
【CateGory Index】： S512.1