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通过三年的氮肥施用量田间试验和室内分析研究,基本探明了氮素营养水平对内麦五号春小麦碳、氮代谢及产量形成的影响;提出了亩产800～900斤的总光合势、光合生产率、生物产量、经济系数、最高总蘖数、总穗数、穗粒数等生理指标及叶面积系数、糖氮含量、碳氮比的动态变化指标;明确了氮素过量减产的原因及倒伏的前兆。为春小麦省肥高产栽培提供理论依据。
Through three years of field experiments and laboratory analysis on the amount of nitrogen application, the effects of nitrogen level on carbon and nitrogen metabolism and yield formation of Neumai 5 spring wheat were basically ascertained. The total photosynthetic potential of 800 ~ 900 kg per mu , Photosynthetic productivity, biological yield, economic coefficient, the highest total number of tillers, total spikes, grain number per spike and other physiological indicators and leaf area coefficient, sugar and nitrogen content, carbon and nitrogen ratio of the dynamic change indicators; clear nitrogen excess production reasons And the precursor of lodging. Provide a theoretical basis for spring wheat high-yielding and fertilizer-saving cultivation.