茎中氮含量从抽穗期到成熟期一直下降，可能是水稻在抽穗后氮素从营养器官向生殖器官转运。
From heading stage to filling stage, nitrogen concentrations in the roots and the leaves decreased, then increased at milk stage and decreased once again at ripening stage.
茎中氮含量从抽穗期到成熟期一直下降，可能是水稻在抽穗后氮素从营养器官向生殖器官转运。
From heading stage to filling stage, nitrogen concentrations in the roots and the leaves decreased, then increased at milk stage and decreased once again at ripening stage.
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