生态环境学报2015，Vol.24Issue(8)：1274-1279,6.DOI:10.16258/j.cnki.1674-5906.2015.08.003
不同放牧强度下羊草和大针茅草原土壤含水量的空间变化
The Effect of Different Grazing Intensities on Spatial Distribution of Soil Water-underLeymus Chinensis andStipa Grandis Grassland
摘要
Abstract
The improper grazing manner led to soil deterioration in Inner Mongolia grassland. To understand the change of soil water content and its' spatial distribution, 5 plots: Un-grazed since 1979 (LUG79), winter grazing (LWG) and heavy grazing (LHG) under Leymus Chinensis (L), and Un-grazed since 1979 (SUG79) and continuous grazing (SCG), underStipa Grandis(S) Grassland were investigated by HH2 Moisture Meter. In each plot, a regular sampling grid which covered an area of 105m×135m and included 100 points was positioned by GPS. The results showed that precipitation is the key factor to change the magnitude and the spatial variability and distribution of soil water content in Inner Mongolia Grassland. UnderLeymus Chinensis plots, soil water content was greater in LWG (0.29~0.05 cm3·cm-3) than LUG79 (0.24~0.03 cm3·cm-3), however the value was lowest in LHG (0.21~0.01 cm3·cm-3). UnderStipa Grandis the soil water content was greater in SCG (0.28~0.07 cm3·cm-3) than in SUG79 (0.27~0.05 cm3·cm-3). Comparing to un-grazing plots, SCG and LWG could increase the soil water content due to appropriate continuous grazing and winter grazing. In 2 un-grazing plots the soil water content was greater in SUG79 than in LUG79. The geostatistical analyst showed the Proportion for the spatial distribution of soil water content were over 97% in all plots but they were more stable in UG79 than other grazing plots, which indicated grazing destroyed the distribution at some extent.关键词
放牧强度/土壤含水量/空间变化Key words
grazing intensity/soil water content/spatial distribution分类
资源环境引用本文复制引用
甘磊,马蕊,彭扬建,彭新华,莫春梦,RainerHorn..不同放牧强度下羊草和大针茅草原土壤含水量的空间变化[J].生态环境学报,2015,24(8):1274-1279,6.基金项目
德国科学基金会(Forschergruppe 536) （Forschergruppe 536）
国家重点基础研究发展计划(2013CB429902) （2013CB429902）
广西矿冶与环境科学实验中心和广西高等学校高水平创新团队及卓越学者计划项目资助 （）
