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.

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结果表明，在籽粒灌浆初期，高温环境下灌浆充实的籽粒，其稻米的垩白增加、透明度变差、整精米率下降，对出糙率及精米率没有明显影响。

The results showed that at the early stage of milk filling, the grains of fully milk filling under high temperature had a higher chalkiness, lower transparency, and lower rate of white rice.

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由此说明，部分亚杂组合籽粒充实不良的主要原因是弱势粒灌浆启动期滞后与灌浆速率小。

These results show that the main causes of poor grain filling are later filling initiation and lower filling rate of inferior grains.

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