童依平, 李继云, 李振声. 农作物N素利用效率基因型差异及其机理[J]. 中国生态农业学报(中英文), 1999, 7(2): 23-27.
引用本文: 童依平, 李继云, 李振声. 农作物N素利用效率基因型差异及其机理[J]. 中国生态农业学报(中英文), 1999, 7(2): 23-27.
Tong Yi-ping, Li Ji-yun, Li Zhen-sheng. The mechanism behind genotypic differences for nitrogen use efficiency in crops[J]. Chinese Journal of Eco-Agriculture, 1999, 7(2): 23-27.
Citation: Tong Yi-ping, Li Ji-yun, Li Zhen-sheng. The mechanism behind genotypic differences for nitrogen use efficiency in crops[J]. Chinese Journal of Eco-Agriculture, 1999, 7(2): 23-27.

农作物N素利用效率基因型差异及其机理

The mechanism behind genotypic differences for nitrogen use efficiency in crops

  • 摘要: 不同农作物N素利用效率基因型差异主要与N素吸收效率和生理利用效率有关。根系N的吸收动力学、根系形态、吸收时间是影响N素吸收效率的重要因素;N素生理利用效率与N的同化、转运及光合作用、C转运效率等生理过程有关。分析农作物N素利用效率基因型差异机理对提高N肥利用效率,降低N肥损失,充分发挥N肥在农业生产中的作用,降低农业生产成本和保护生态环境,促进农业可持续发展具有重要意义。

     

    Abstract: Genotype differences for nitrogen use efficiency have been found in cereal crops, including rice, wheat, and corn, et al. Genotype differences for nitrogen use efficiency result from the differences for uptake efficiency and utilization efficiency of nitrogen. Kinetic parameter of N uptake, root morphology, and functional period of the root system affect uptake efficiency,and utilization efficiency is a combined result of several physiological processes, including nitrogen assimilation, transference and photosynthesis.Analysis of the mechanism behind genotype differences for nitrogen use efficiency can increase nitrogen utilization efficiency, decrease the loss of nitrogen. Therefore,higher yields with less nitrogen fertilizer can be reached,thus resulting in a sustainable agriculture, reducing the input of the agricultural production, and protecting the eco-environment.

     

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