认为选择开花后氮素吸收同化和再运转能力强的品种，既有利于提高籽粒产量，又可提高籽粒蛋白质含量。
Using the cultivar with stronger ability of absorbing, assimilating and translocation nitrogen can not only improve kernel yield, but kernel protein content.
氮素可限制植物光合、有机质分解、同化产物的分配以及生态系统对大气co2浓度升高的响应。
Nitrogen has great effects on the plant photosynthesis, organic matter decomposition, carbon allocation and the responses of ecosystem when the atmospheric CO2 concentration increases.
以具有典型特征的不同氮效率小麦品种为材料，研究丰、缺氮条件下的籽粒产量、氮效率、氮素吸收特性和氮素吸收同化关键酶活性。
Yield, nitrogen efficiency, characterization of nitrogen uptake and key enzyme activity of nitrogen assimilation were studied in wheat varieties with different nitrogen efficiencies.
以具有典型特征的不同氮效率小麦品种为材料，研究丰、缺氮条件下的籽粒产量、氮效率、氮素吸收特性和氮素吸收同化关键酶活性。
Yield, nitrogen efficiency, characterization of nitrogen uptake and key enzyme activity of nitrogen assimilation were studied in wheat varieties with different nitrogen efficiencies.
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