叶片高度的增长，使沿叶高的等功设计已经不能充分发挥长叶片高圆周速度部分的做功能力。
The increment of blade length makes the equal work distribution along the blade length be unable to dig the potential power of long blade at the part with high circumferential velocity.
结论合理群体的小麦叶片会随太阳方位角和高度角的变化而变化。
Conclusion Wheat leaves of reasonable population varied with changes of solar position Angle and altitudinal Angle.
同步叶片修剪与植株密度并不影响植株的发育，对植株高度也没有显著影响。
Both plant development and height were influenced neither by synchronous leaf pruning nor by plant density.
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