Abstract:

Using cultivar ‘Zhengmai9023’, field experiment was conducted to investigate the effect of nitrogen application on physiological traits of flag leaves and yield of strong gluten wheat. The results indicated that there was significant difference among nitrogen application. The chlorophyll and nitrogen content of flag leave, kernels of per spike, 1000-kernal weight and grain yield of booting-applying treatment were best (60%), but no of spike of early jointing-applying treatment was most. Meanwhile, compared to those of complete base-applying, re-growth stages and early jointing-applying treatments (60% of the total nitrogen), the grain yield of wheat was increased by 1.8%, 6.2% and 9.9%, this showed that little applying nitrogen of early stages and more applying nitrogen of later stages both provided adequate nitrogen for fast growing stages of wheat and increased chlorophyll content and prevented leave premature, meanwhile, it was positive important to improve kernels of per spike and form big spike and increased 1000-kernal weight and grain yield.