整个灌浆期氮素供应充足提高了籽粒库活性和碳氮代谢水平，促进了籽粒库容建成和库充实；
Sufficient nitrogen supply during grain filling period promoted kernel growth by improving carbon-nitrogen metabolism and sink activity of kernels.
在整个灌浆期，叶鞘又作为物质向籽粒运输的通道(流)——转运同化物质。
In the whole grain filling periods, leaf sheath performed function as flow organs which participated in assimilation products transportation from leaves to grains.
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