通过对比研究放牧制度及围栏封育对退化草地植被的影响，来探讨划区轮牧在退化草地植被恢复中的作用以及最优的放牧方式。
Through comparing effects between grazing systems and a feedlot system on the degenerated vegetation, the roles of rotational grazing system playing in vegetation recovery were investigated.
草地沙化是一个植被、土壤与环境全面退化的过程。
Grassland desertification is also a process of comprehensive degradation of vegetation, soil and environment.
论述了黄河三角洲草地的形成与演替及当前草地碱化、退化、植被减少、生态系统恶化情况。
The grassland formation and succession in Yellow River Delta were discussed. The salinization, grassland degradation and ecosystem deterioration in the region were described.
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