Effects of Nitrogen Application Rate on Carbon and Nitrogen Transportation in Winter Wheat

A field experiment was conducted to study the effects of nitrogen rate on carbon and nitrogen transportation in winter wheat cultivars with two spike types.The results showed that the fitting nitrogen application(180 kg·hm-2) increased the amounts of re-transported storage matter and nitrogen,the rate of transported storage matter and nitrogen in the leaves and leaf sheaths and the total amounts of re-transported storage matter and nitrogen and the total rates of transported storage matter and nitrogen in winter wheat before flowering,and also increased the nitrogen contents in the kernels and contribution of total remobilization of pre-anthesis stored nitrogen to grain.However,the nitrogen application on contribution of total remobilization of post-anthesis stored nitrogen to grain did not show this effect.In addition,the fitting nitrogen application benefits protein yield increasing.