蚯蚓洞穴极有助于植物根系生长。
氮磷营养对小麦根系生长具有明显的调节作用。
Nitrogen phosphorus nutrition possess very fine adjustment action on root system growth of wheat.
树势强者与树势弱者相比较，前者根系生长量大大超过弱树，枝梢生长量也比弱树大；
The root and shoot growth of vigorous trees exceed the weak tree in this experiment.
植株的根系可以生长至地下数米以获得地下水。
The roots of the plant may have to grow several meters deep to reach groundwater.
植株的根系可以生长至地下数米以获得地下水。
The roots of the plant may have to grow several meters deep to reach groundwater.
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