Nitrogen use efficiency and its relationship with nitrogen nutrition characteristics of wheat varieties

Abstract

Abstract: Forty wheat varieties were tested at two sites (Xuzhou and Nanjing) to evaluate genotypic and environmental variation of nitrogen use efficiency (NUE) and its relationship with nitrogen nutrition characteristics.It was shown that genotype had significant effect on NUE,but environment had less effect on NRE and NFE.All of the nitrogen nutrition traits were significantly influenced by the interaction of genotype譭nvironment.NFE,as an integrated index reflecting the differences of grain yield and nitrogen utilization among different wheat varieties,was significantly correlated with NRE,NPP and NPS,which indicated that it should be more useful in evaluating nitrogen use efficiency.NFE could be improved by increasing N assimilation and translocation after anthesis to effectively increase the N utilization of wheat.

Key words: Wheat, Nitrogen use efficiency (NUE), Genotypic variation, Environmental effect, Evaluation index

CLC Number:

S311

SUN Chuanfan, DAI Tingbo, JING Qi, JIANG Dong, CAO Weixing. Nitrogen use efficiency and its relationship with nitrogen nutrition characteristics of wheat varieties[J]. Chinese Journal of Applied Ecology, 2004, (6): 983-987.

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