不同封育条件下荒漠草原生态系统健康评价

Desert grassland ecosystem health evaluation under different fenced enclosure conditions

为定量评价围封对草原生态系统健康的影响,以宁夏盐池柳杨堡封育区为研究区域,采用生态系统健康指数对该区不同封育条件下荒漠草原进行评价分析。结果表明:1)从封育时间上看,封育时间越长,生态系统健康水平并非越好。2)从放牧压力上看,早期封育期间,放牧不利于草原生态系统健康恢复;封育达到一定年限后,适度放牧有利于草原生态系统健康恢复。因此,在荒漠草原植被恢复研究中,有必要调整封育年限、适度放牧,不仅能获得一定的经济效益,还能促进荒漠草原生态系统健康恢复。

In order to quantitatively assess the influence of fenced enclosure on the grassland ecosystem health, this paper took the Liuyangpu enclosure region of Yanchi County, Ningxia, as research area, using ecosystem health index to evaluate desert grassland under different fenced enclosure conditions. The results are as follow. 1 ） From the perspective of enclosure time, long-time fencing is not conducive to the vegetation recovery. 2） From the viewpoint of stocking pressure, during the early enclosure time, grazing is not beneficial to the recovery of grassland ecosystem health; after certain years, moderate grazing benefits the recovery of grassland ecosystem health. Therefore, in the research of the recovery of desert grassland, it is necessary to adjust the enclosure time and moderate grazing. It may not only obtain certain economic benefits, but also promote the recovery of grassland ecosystem health.