The N absorption rate is the highest at the panicle development phase in the first crop, the second highest is at the late tillering stage and the grain filling stage of the first crop and during the period f.
对再生稻头季不同施N水平的双季N素吸收及产量效应研究结果表明 ,双季稻株吸N量与头季稻施N量呈抛物线形相关 ,以头季稻穗发育阶段吸N速率最高 ,头季稻分蘖末期、结实期和头季稻收割～再生季稻齐穗期次之。
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