内蒙古主要草地类型土壤有机碳密度对比  

Comparison of soil organic carbon density of main grassland types in Inner Mongolia

作　　者：田政[1] 吴秀芹[1] 谢芮[1] 黄宇[2,3] 

机构地区：[1]北京林业大学水土保持学院,北京100083 [2]中国科学院地理科学与资源研究所,北京100101 [3]中国科学院大学,北京100049

出　　处：《中国水土保持科学》2014年第4期8-13,共6页Science of Soil and Water Conservation

基　　金：国家重点基础研究发展计划(973计划)"天然森林和草地土壤功能与固碳潜力研究"(2011CB403206)

摘　　要：通过野外调查与室内分析相结合的方法,对内蒙古草甸草原、典型草原、荒漠草原3种草地类型地上植被和土壤有机碳密度进行对比分析,以期为内蒙古草原地区草地及土壤固碳能力的改良提供参考.结果表明：1）在不同生物量级别下,不同草地类型的土壤有机碳密度均表现出了各自的规律性差异.草甸草原、典型草原、荒漠草原土壤有机碳密度相对稳定的生物量阈值区间分别为100 ～180、120 ～140和60 ～80 g,在阈值范围外,平均土壤有机碳密度差异显著;2）在80～ 100 g与120 ～140 g 2组生物量级别下,不同群落类型间土壤有机碳密度尽管存在部分差异,但总体而言,群落类型对土壤有机碳密度的影响无明显规律.改良草地植被生长状况,防止水土流失和草地退化,对增加草原土壤有机碳密度、提高草原土壤固碳能力有着积极的作用.Based on field survey and laboratory experiments,we compared soil organic carbon density and aboveground biomass of three types of grassland （meadow grassland,typical grassland and desert grassland） in Inner Mongolia,northern China,in order to provide reference for grassland protection and improvement of soil organic carbon sequestration capacity.The results are as follows.1） The variation regularity of soil organic carbon density differs in each of the three types of grassland：it is 100-180 g for the meadow grassland,120-140 g for the typical grassland and 60-80 g for the desert grassland,while it is significantly different when the biomass is beyond the threshold value.2） For different communities at the same biomass levels （80-100 g and 120-140 g）,there exist some differences in soil organic carbon density,but without any obvious regularity.In brief,the improvement of biomass and prevention of grassland degradation would have positive effects on the increase of soil organic carbon density and improvement of soil organic carbon sequestration ability of grasslands.

关 键 词：草原 生物量 土壤有机碳 内蒙古 

分 类 号：S812.2[农业科学—草业科学]