干旱区生态环境知识资源中心(Arid): 六盘山叠叠沟小流域典型坡面土壤水分的植被承载力

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	六盘山叠叠沟小流域典型坡面土壤水分的植被承载力
其他题名	VEGETATION CARRYING CAPACITY BASED ON SOIL WATER ON TYPICAL SLOPES IN THE DIEDIEGOU SMALL WATERSHED OF LIUPAN MOUN-TAINS, NORTHWESTERN CHINA
	刘建立; 王彦辉; 于澎涛; 程丽莉; 熊伟; 徐丽宏; 杜阿朋
来源期刊	植物生态学报
ISSN	1005-264X
出版年	2009
卷号	33 期号:6 页码:1101-1111
中文摘要	确定土壤水分的植被承载力是我国北方半干旱地区合理调控土壤水分和植被生长关系、科学恢复林草植被的核心问题.我国北方半干旱地区的土壤水分主要来自大气降水,作为土壤水分限制型生态系统的坡面植被,植物种类和植被密度等结构特征与降水量紧密相关.根据六盘山石质山区的特点,基于水量平衡原理.建立了阴坡华北落叶松(Larix principis-rupprechti)和阳坡草地的土壤水分植被承载力数学模型.即由4-10月的生长季降雨量(P)计算得到可承载的叶面积指数(Leaf area index,LAI)公式:LAI_(tree)=exp((0.7731*P-186.12)/146.46)和LAI_(grass)=exp((O.5112xP-345.93)/227.89),并提出了考虑坡面水分再分配影响的不同坡位的土壤水分植被承载力计算方法.阴坡华北落叶松的植被承载力(用LAI表示)从坡顶的1.45升高到坡中的4.83,然后稳定在3.0～3.3.对于阳坡草地,土壤水分可承载的LAI从坡顶的0.37上升到坡中的0.46,然后在0.41～0.47之间变动,LAI的计算值与实测值较为接近,计算结果比较合理.
英文摘要	Aims Soil water is the main limiting factor for vegetation, and it mainly comes from precipitation in the Diediegou small watershed in the Liupan Mountains, northwestern China, where the structure of slope vegetation is usually closely related with the amount of precipitation. Our objectives were to develop a method for estimating vegetation carrying capacity (VCC) on sites based on water balance and to evaluate variation of VCC along typical slopes, for guiding the restoration and management of vegetation on similar slopes.Methods We established nine plots along two typical slopes of natural grassland and larch (Larix principis-rupprechti) plantation, measured leaf area index (LAI) every 15 days and continuously monitored all water fluxes and soil water dynamics. After analyzing plot water balance, we determined the relationships among evapotranspiration (ET), LAI and precipitation to estimate VCC based on growing season precipitation and calculated the variation of VCC along slopes. Important findings Our mathematical models for determining VCC (expressed as the maximal LAI) based on precipitation amount (P, mm) in growing season (April-October) were LAI_(tree)=exp ((0.773 1P-186.12V146.46) for the larch stand on the shady slope and LAI_(grass)=exp ((0.511 2 P-345.93)/227.89) for the grassland on the sunny slope. The VCC of larch stands on the shady slope increased from upper slope (1.45) to middle slope (4.83) and then stabilized between 3.0 and 3.3. For grassland on the sunny slope, VCC increased from upper slope (0.37) to middle slope (0.46) and then stabilized between 0.41 and 0.47. Measured values of LAI were close to those of simulated VCC, supporting the rationality of our method and the result. Using LAI as an index expressing VCC, which is mainly determined by soil water in dryland regions, is a new method for calculating VCC for slopes where precipitation water is redistributed in the forms of runoff and interflow.
中文关键词	六盘山 ; 坡面 ; 土壤 ; 水分 ; 承载力 ; 植被恢复 ; 叶面积指数
英文关键词	Liupan Mountains slope soil water carrying capacity vegetation restoration leaf area index (LAI)
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Plant Sciences
CSCD记录号	CSCD:3759742
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378652
作者单位	刘建立, 中国林业科学研究院森林生态环境与保护研究所, 北京 100091, 中国.; 王彦辉, 中国林业科学研究院森林生态环境与保护研究所, 北京 100091, 中国.; 于澎涛, 中国林业科学研究院森林生态环境与保护研究所, 北京 100091, 中国.; 熊伟, 中国林业科学研究院森林生态环境与保护研究所, 北京 100091, 中国.; 徐丽宏, 中国林业科学研究院森林生态环境与保护研究所, 北京 100091, 中国.; 杜阿朋, 中国林业科学研究院森林生态环境与保护研究所, 北京 100091, 中国.; 程丽莉, 北京市农林科学院林业果树研究所, 北京 100093, 中国.
推荐引用方式 GB/T 7714	刘建立,王彦辉,于澎涛,等. 六盘山叠叠沟小流域典型坡面土壤水分的植被承载力[J],2009,33(6):1101-1111.
APA	刘建立.,王彦辉.,于澎涛.,程丽莉.,熊伟.,...&杜阿朋.(2009).六盘山叠叠沟小流域典型坡面土壤水分的植被承载力.植物生态学报,33(6),1101-1111.
MLA	刘建立,et al."六盘山叠叠沟小流域典型坡面土壤水分的植被承载力".植物生态学报 33.6(2009):1101-1111.