盐池柳杨堡人工封育区植被空间异质性  

Spatial heterogeneity of vegetation in artificially fenced area in Liuyangpu of Yanchi County in Ningxia

作　　者：王志述[1] 张克斌[1] 王晓[1] 

机构地区：[1]北京林业大学水土保持学院,北京100083

出　　处：《中国水土保持科学》2015年第5期52-57,共6页Science of Soil and Water Conservation

基　　金：国家自然科学基金"全国荒漠化定点监测"(30771764)

摘　　要：利用幂乘方法则模型研究宁夏盐池柳杨堡人工封育区的群落结构特征,包括物种组成、物种多样性、生物量和空间分布规律等。结果表明:1)幂乘方法则在解析柳杨堡不同封育区的空间异质性时具有很好的吻合性,核心区、边缘区和外围区相较随机分布均呈现出较强的空间异质性;2)群落整体的空间异质性指数表现为边缘区>核心区>外围区,样方内的平均生物量为边缘区>外围区>核心区。研究表明封育是一种有效的植被恢复方法,但应根据草地退化程度和草地恢复状况进行适时、适度的放牧或刈割。The community characteristics,including species composition,species diversity,biomass,and spatial distribution,of the artificially fenced area in Liuyangpu of Yanchi County in Ningxia were analyzed using the power-law method. The results showed that： 1） the spatial heterogeneity of vegetation of three different fenced areas fit the power-law well and exhibited a strongly heterogeneous distribution than a random distribution. 2） The spatial heterogeneity index followed the order of edge area core area outside area,and the average biomass ranked as edge area outside area core area. The results indicate that fencing is an effective measure to improve the condition of the grassland,but it is suggested that appropriate razing or cutting could be used according to the state of the grassland.

关 键 词：人工封育 幂乘方法则 物种多样性 空间异质性 宁夏 

分 类 号：Q948[生物学—植物学]