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研究了不同密度和施肥水平下的水稻氮素吸收和积累的规律 .结果表明 :不同施肥水平下的水稻各生育期氮素吸收比例移栽至幼穗形成期为 2 4 %～ 32 %,幼穗形成期至齐穗期为 57%～69%,齐穗期至成熟期为 5.7%～ 1 0 %.稀植群体的后期吸氮量高于密植群体
The nitrogen uptake and accumulation of rice at different densities and fertilization levels were studied.The results showed that the rate of nitrogen uptake by rice at different growth stages was 24% ~ 32% The spikelet formation ranged from 57% to 69% during heading stage and from 5.7% to10% from heading stage to mature stage.