生态环境学报Issue(5)：748-754,7.
放牧强度季节调控对短花针茅荒漠草原土壤养分的影响
Effects of seasonal regulation of grazing intensity on soil nutrients in Stipa breviflora desert grassland
摘要
Abstract
In this study, we investigated the Soil Nutrients under Seasonal Regulation of Grazing Intensity in Stipa breviflora desert grassland of inner Mongolia, china. An experimental design was used with six treatments of five Seasonal Regulation of Grazing Intensity and CK. The results show that the total N, available N, NH4-N were no significant in different treatment (P>0.05) in 0-10 cm soil layer. The total nitrogen content with soil depth change was no significant difference in SA1 (zero-grazing in spring, severe grazing in autumn and moderate grazing in summer) treatment (P>0.05). The total nitrogen of surface soil was higher than the bottom in the SA2 (zero-grazing in spring, moderate grazing in summer and severe grazing in autumn) treatment. The total P and available P content with soil depth change was no significant difference (P>0.05). In the SA5 (moderate grazing in spring, moderate grazing in summer and moderate grazing in autumn) treatment, total P and available P content were lower the other layer in the 0-10 cm soil layer. In the SA1 treatment, the available K content of 0-10, 20-30 cm soil layer was higher than SA2 (zero-grazing in spring,moderate grazing in summer and severe grazing in autumn) treatment (P<0.05). The soil organic matter of the five Seasonal Regulation of Grazing Intensity were increased with CK treatment. Available P was significant correlation with NH4-N, NO3-N (P<0.01). Total N had significant correlation with organic matter (P<0.01).关键词
短花针茅/放牧强度/季节调控/土壤养分/相关性Key words
Stipa breviflora/grazing intensity/seasonal regulation/soil nutrients/correlation分类
农业科技引用本文复制引用
孙世贤,卫智军,陈立波,吕世杰,陈越,王敏..放牧强度季节调控对短花针茅荒漠草原土壤养分的影响[J].生态环境学报,2013,(5):748-754,7.基金项目
国家公益性行业（农业）科技项目不同区域草地承载力与家畜配置（200903060）；国家“十二五”科技支撑计划项目(2012BAD13B07) （2012BAD13B07）
