应用生态学报2012，Vol.23Issue(11)：2991-2996,6.
放牧干扰对荒漠草原植物叶性状及其相互关系的影响
Effects of grazing disturbance on leaf traits and their interrelationships of plants in desert steppe
摘要
Abstract
This paper studied the effects of grazing disturbance on the specific leaf area (SLA), leaf dry matter content (LDMC), leaf area, and leaf dry mass of dominant plant species Cynan-chum komarovii, Euphorbia esula, Glycyrrhiza uralensis, and Lespedeza potaninii in desert steppe of Ningxia, Northwest China, aimed to approach the responses and adaptation strategies of different plant species in desert steppe to the environmental change. With the decrease of grazing intensity, the specific leaf area (SLA) of the four dominant species presented a decreasing trend. Under different grazing intensities, the SLA of the four dominant species had significant differences, while the LDMC didn' t. There existed definite differences in the interrelationships of leaf traits among different plant species. For C. komarovii and G. uralensis, there was a significant negative relationship between SLA and LDMC, for E. esula and L. potaninii, there was a positive relationship between the two parameters. The changes in the leaf traits in response to grazing intensity suggested that the SLA could be more sensitive to the environmental change than LDMC, and the SLA could be used as an indicator of resources use strategies of plants in desert steppe environments.关键词
荒漠草原/放牧干扰/比叶面积/叶干物质含量Key words
desert steppe/ grazing disturbance/ specific leaf area/ leaf dry matter content分类
农业科技引用本文复制引用
安慧..放牧干扰对荒漠草原植物叶性状及其相互关系的影响[J].应用生态学报,2012,23(11):2991-2996,6.基金项目
国家自然科学青年基金项目(31000214)、高等学校博士学科点专项科研基金项目(20106401120001)和国家科技支撑计划项目(2010BAC07B03)资助. （31000214）
