不同荒漠化防治措施对植物群落稳定性的影响——以宁夏回族自治区盐池县为例

Effects of different desertification controlling measures on stability of plant community——Taking Yanchi County of Ningxia Hui Autonomouos Region as example

以宁夏回族自治区盐池县植物为研究对象,利用法国生态学专家 Godron提出的方法经改进后,测定不同治理措施下植物群落稳定性.结果表明：测定的5个样地（人工封育核心区、边缘区、外围区、退耕还草区、天然草场区）的稳定比分别为37.82/62.18、36.46/63.54、35.75/64.25、39.35/60.65、41.39/58.61,表明盐池县人工封育区、退耕还草地以及天然草场的植物群落尚处于不稳定状态.盐池县人工封育与退耕还草措施均可以提高植物群落稳定性,并且人工封育措施更为有效,但是人工封育时间不可过长,以2～3a为宜,并且以2～3a为周期进行轮牧可以更好的促进草场恢复.

Taking the vegetation of Yanchi County of Ningxia as the study obj ect,and improved method which proposed by French ecologist Godron was used to measure the stability of the community under dif-ferent control measures.The results indicated that the stability ratio of five sample plots（artificial cultiva-ting core area,edge area,outside area,farmland to grass land,native pasture ）were 37.82/62.18,36.46/63.54,35.75/64.25,39.35/60.65 and 41.39/58.61,respectively,which indicated that the vegetation of ar-tificial cultivating area,farmland to forest land and native pasture in Yanchi County were not stable.Both artificial cultivating and returning farmland to forest land measures could improve the stability of plant community,and the artificial cultivating measure was more effective,but this measure could not last too long,and the optimum time should be 2 to 3 years.And with 2~3 years as a cycle of rotational grazing could better promote the grassland restoration.