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Exclosure plays an important role in grassland management .

围封是草地管理的重要手段。

Advances in research on the effects of exclosure on grasslands .

围封对草地的影响研究进展。

The plant diversity of the grassland would be changed after exclosure due to population growth and decline , disappearance of some species and immigrant of new species .

由于围封后种群的消长、某些种群的消失及新种的进入导致草地在围封后的植物多样性也发生变化。

Effects of grazing and exclosure on soil and vegetation in alxa desert steppe .

放牧和围封对阿拉善荒漠草地土壤和植被的影响。

What is involved here is the extreme case of selection , termed competitive exclosure , ecological exclosure , mutual exclosure or similarity .

这里所涉及的是被称为竞争限外区，生态限外区、相互限外区或类似这种选择的极端情况。