宁夏毛乌素沙地退化草原恢复演替过程中物种多样性与生产力的变化

对宁夏毛乌素沙地退化草原种植不同林龄柠条Caragana korshinskii后物种的多样性、群落结构及草地生产力进行了研究,结果表明:种植柠条林对退化草地的植被恢复有积极的作用,植物群落的多样性随柠条林龄的增加而增加,而且随林龄年份的增加,群落结构更趋于稳定.草地生产力由于土壤储水量相对较高,表现为随林龄的增加,草产量受季节降水量变化的影响较小,相对稳定的趋势.

Changes of productivity and species diversity in resume succession on the degraded steppe of Maowusu sands in Ningxia

The diversity of species, community structure and forage productivity of different forest age after planting Caragana on the degraded steppe in Maowusu sands, Ningxia province, was studied. The result showed that: planting Caragana forest had a positive role on the vegetation recovery of degraded steppe communities, diversity increased with the increased forest age of Caragana, What's more, community structure tended to be more stabilized with the increase of the forest age. Forage productivity showed a relative stable trend due to high soil moisture storage, i.e. with increased forest age, forage productivity changed very little to the change of rainfall.