小麦超高产生理基础探讨──小麦后期碳氮代谢互作与粒重形成

Discussion on the Physiological Basis of Superhigh Wheat Yield:Grain Weight Formation in Relation to the Postanthesis Interaction Between Carbon and Nitrogen

通过分析小麦高产水平与氮素吸收规律，认为增加开花后植株氮素吸收，缩小茎叶的氮素输出输入差值，从而维持开花后植株氮素水平，维持光合效率与叶面积持续期，进而增加粒重可能是小麦再高产的重要途径之一。探讨了这一途径可能引发的碳氮代谢互作的生理限制性，并论述了基因型、环境条件及矿质营养平衡的在其中的决定性作用。

With analysis of the correlation between wheat yield and the nirogen absorption, it is suggested that increasing in nitrogen postanthesis, reducing the difference between nitrogen expor and import, to maitaining leaf photosynthesis rate and leaf area duration in order to increasing grain weight, may be one of the important measures for obtaining super-high wheat yield. The possible physiological limits involved, as well as the decisive roles of genotypes, environment condition and mineral nutrients balance, are discussed.