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yong sheng yu liang ye se ji ye qiao ran se bi pan duan dan su kong zhi de xiao guo
Pages: 37
Year: Issue:  Z2
Journal: Reclaiming and Rice Cultivation

Keyword:  生育中期染色比叶片含氮量氮素含量氮素浓度干物重氮素吸收水稻品种颖花数受光态势;
Abstract: <正> 在生育中期,即叶片指数(LNI)为70—90时进行氮素控制,目的是为了确保单位面积的颖花数,使体内氮素浓度降低,以抑制其生长,改变出穗后的受光态势。试验于1969—72年进行,供试水稻品种为"万两",作了砾耕栽培、土壤栽培、大田直播、移栽等试验。使用不同氮肥以限制其生育中期的氮素吸收,到叶片指数为90时,测定叶片氮素含量、地上部干物重及第五节间长等,以断定氮肥施用时
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