The drought stress from jointing to heading stage decreased nitrogen nutrition efficiency of winter wheat significantly.
拔节至抽穗期干旱胁迫极显著地降低冬小麦的氮素营养效率。
Therefore, the mild water stress can be allowed in the jointing stage of winter wheat, and grain-filling stage should try to avoid any degree of water stress.
因此，冬小麦拔节期允许轻度的水分胁迫，而灌浆期则应尽量避免任何程度的水分胁迫。
The results showed that the growing stage from reviving to maturity stage of winter wheat became earlier and the postponed tendency of the jointing stage was the most obvious.
结果表明：河南省冬小麦自返青到成熟的各生育期均表现出提前的趋势，其中以拔节期提前最明显；
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