贵州岩溶峡谷区石漠化对土壤碳库的影响  

Influence of Karst Rocky Desertification on Soil Carbon Pool in Guizhou Karst valley region

作　　者：郭红艳[1,2] 崔明[2] 周金星[1,2] 但新球[3] 丁访军 吕相海 

机构地区：[1]北京林业大学水土保持学院水土保持与荒漠化防治教育部重点实验室,北京100083 [2]中国林业科学研究院荒漠化研究所,北京100091 [3]国家林业局中南林业调查规划设计院,湖南长沙410014 [4]贵州省林业科学研究院,贵州贵阳550011 [5]中国国际工程咨询公司,北京100048

出　　处：《林业科学研究》2014年第6期822-829,共8页Forest Research

基　　金：中央级公益性科研院所基本科研业务费专项(编号CAFYBB2014ZD006);国家林业局科技项目“石漠化治理监测与评价”(编号2011-LY-036)

摘　　要：研究以喀斯特典型区贵州省关岭布依族苗族自治县花江峡谷区为例,对未石漠化土地和不同程度石漠化土地中的土壤有机碳和无机碳进行了测定,并计量分析了石漠化治理对土壤碳库的影响。结果表明:(1)未石漠化土地的土壤平均碳库总量比石漠化土地的高,石漠化土地的土壤平均碳库总量主要受植被类型和土层深度的影响,其影响程度大于石漠化程度的影响;(2)土地平均碳密度则与石漠化影响程度呈显著的负相关关系,即呈非石漠化土地>潜在石漠化土地>石漠化土地,轻度石漠化土地>中度石漠化土地>重度石漠化土地>极重度石漠化土地的变化规律;(3)通过石漠化综合治理工程,关岭县未石漠化土地和不同程度石漠化土地的面积发生了明显变化,对治理工程的碳汇效益计量分析表明,碳库增加量为724.00 t·km-2,仅增加的有机碳价值可达51.36万元·km-2,治理效果显著。The paper takes karst valley region as study area to assess the influence of rocky desertification management on soil carbon pool for the first time.We selected the Huajiang karst gorge in Guanling County of Guizhou Province as the sampled field,which is a typical rocky desertification region,soil organic and inorganic carbon content of the soil samples from non-rocky desertification land and rocky desertification land were tested respectively,and carbon densities were calculated.The results showed that：（1） the average soil carbon storage of non-rocky desertification land is higher than that of rocky desertification land,and the average carbon storage in soil profiles of rocky desertification land has less relation with the degree of rocky desertification than with vegetation type and soil depth ; （2） the average carbon density decreases as the seriousness of rocky desertification increases,none ＞ potential ＞ slight ＞ moderate ＞ serious ＞ significantly serious ; （3） soil quality was improve by the Rocky Desertification Comprehensive Management Project in the past years,according to the areas of non-rocky desertification land and rocky desertification changed in Guanling County,the total soil carbon storage increased by 724 t per square kilometer,in which,the value of organic carbon increased 513600 yuan per square kilometer.

关 键 词：岩溶石漠化 土壤碳库 花江峡谷区 关岭县 

分 类 号：S718.42[农业科学—林学]