草业科学2016，Vol.33Issue(3)：377-384,8.DOI:10.11829/j.issn.1001-0629.2015-0093
模拟放牧对天山北坡草甸草原生态系统碳储量的影响
Effect of simulated grazing on carbon storage of meadow grassland ecosystem in the north slope of Tianshan Mountain
摘要
Abstract
In order to evaluate the potential effects of grazing intensity on organic carbon storage in the north slope of Tianshan Mountain meadow grassland,organic carbon storage in plant biomass,litter,root and soil were analysis in the steppes with four simulated grazing intensities (no grazing,light grazing,moderate graz-ing,heavy grazing)in 2012—2013.The results showed that the organic carbon storage in total,plant biomass and litter decreased with the increase of intensity.The carbon storage in root decreased in the following order:light grazing > no grazing > moderate grazing > heavy grazing and moderate grazing decreased by 42.25%and heavy grazing decreased by 72.41% compared with light grazing.The carbon storage in soil decreased in the following order:no grazing > moderate grazing > light grazing > heavy grazing.With the increase of soil depth,the carbon storage in roots gradually reduced and the changes of organic carbon density in soil varied which had an overall decline trend.The organic carbon storage in root and soil surfaced significantly.The car-bon storage in the 0—20 cm soil layer account for 40% of the total carbon and the carbon storage decreased in the following order:soil > root > ground biomass.The organic carbon storage in soil was highest which ac-count for more than 85% whereas the carbon storage in litter was the least.关键词
放牧强度/草甸草原/碳密度/碳储量Key words
grazing intensity/meadow grassland/carbon density/carbon storage分类
农业科技引用本文复制引用
孙霞,丁娓,贾宏涛,金俊香..模拟放牧对天山北坡草甸草原生态系统碳储量的影响[J].草业科学,2016,33(3):377-384,8.基金项目
新疆草地资源与生态重点实验室开放课题(XJDX0209-2011-03) （XJDX0209-2011-03）
土壤学自治区重点学科 （）
自治区重点实验室干旱区土壤与植物生态过程实验室 （）
