轻度放牧或过度放牧都可以引起人工草地的退化演替。
Light grazing or over grazing lead to deteriorative succession of artificial sward.
研究结果表明，根据土地类型所处的土地生态系统的演替阶段来判定土地退化程度，是目前比较简便而又切实可行的土地退化评价方法。
The results showed that it was a simple and practical method, which was based on the ecosystem succession stage of land types to assessment land degradation.
群落演替处于快速衰落阶段，退化迹象十分明显。
The community succession was on the comedown phase rapidly, and the evidence of degeneration was naked.
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.
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.
应用推荐