根据江西省第2次土壤普查资料,结合“十五”期间(2001—2005年)江西省森林资源二类调查资料,采用GIS技术和国际上常用的土壤分类系统对江西省森林土壤有机碳密度和碳储量进行了估算,并分析其空间分布特征。江西省森林总面积为1 004.32万hm2,其0~20 cm和0~100 cm土层有机碳储量分别为4.01×108 t和1.03×109 t。总体上看,从中北部平原向外至山地,土壤有机碳密度水平呈递增趋势,表现出受气候、植被和地形影响的地带性分布特征。森林土壤0~20 cm土层的平均有机碳密度(以面积加权)为3.89 kg/m2,低于我国自然土壤表层平均有机碳密度值(570 kg/m2),略高于全国耕作土壤平均有机碳密度值(3.00 kg/m2);在0~100 cm土层的平均有机碳密度为10.21 kg/m2,略高于近年来中国土壤平均有机碳密度的估算值(5.46~9.60 kg/m2)。
Abstract
According to the inventory data from the second soil survey and forest inventory materials for management plan (2001—2005) of Jiangxi province, the total soil organic carbon (SOC) storage of forest in Jiangxi province was estimated, and its spatial distribution characteristics was analysed using GIS technique and the popular soil type method. The total forest area of the Jiangxi province was 10.043 2×106 hm2, and the SOC storage within 0—20 cm depth and 0—100 cm depth were 4.01×108 t and 1.03×109 t respectively. The SOC density showed an increase from its middle and north area to outer mountain regions. The characteristics of regional distribution were due to climate, vegetation and landforms. The average SOC density in 0—20 cm depth of forest soil was 3.89 kg/m2, which was lower than that of natural soil (5.70 kg/m2) and higher than that of ploughed soil (3.00 kg/m2) in the country. The average SOC density within 0—100 cm depth of forest soil was 10.21 kg/m2, which was higher than that of the whole country’s average value (5.46—9.60 kg/m2).
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基金
收稿日期:2009-03-10修回日期:2009-06-08基金项目:科技部国际合作项目(2006DFB91920);国家自然科学基金项目(30860229)作者简介:宋满珍(1975—),工程师,硕士生。*欧阳勋志(通信作者),教授。Email: oyxz_2003@hotmail.com。引文格式:宋满珍,刘琪璟,吴自荣,等. 江西省森林土壤有机碳储量研究[J]. 南京林业大学学报:自然科学版,2010,34(2):6-10.