Grain filling characteristics of wheat cultivar with different nitrogen efficiency
In order to clarify the grain filling characteristics of wheat varieties with different nitrogen efficiency and their relationships with yield and nitrogen efficiency,wheat varieties with high yield and high nitrogen efficiency(HH),high yield and low nitrogen efficiency(HL)and low yield and low nitrogen efficiency(LL)were selected as experimental materials from 2019 to 2021.Logistics model was used to simulate the grain filling process under field production conditions,and the yield component parameters were analyzed.The relationship between grain filling characteristics and nitrogen use efficiency of wheat with different nitrogen efficiency was investigated.The results showed that there were significant differences in grain filling characteristics among different varieties.The maximum and average grain filling rate of different varieties were all ranked as HH＞HL＞LL,and the grain quality at the maximum grain filling rate was ranked as HL＞HH＞LL,and the difference between HH and HL was not obvious.The active grain filling period and effective filling time were all performed as HH＜HL＜LL.Compared with the low nitrogen efficiency varieties of HL and LL,the variety of HH showed the characteristics of early filling start,fast filling speed and shorter effective filling time,which may be related to the nitrogen efficiency of the varieties.
万方数据
维普
