土地利用方式转变对赣中地区土壤活性有机碳的影响

应用生态学报

土地利用方式转变对赣中地区土壤活性有机碳的影响

杜满义¹,范少辉^1**,刘广路¹,漆良华¹,郭宝华¹,唐晓鹿¹,肖复明²

(¹国际竹藤中心/国家林业局竹藤科学与技术重点实验室, 北京 100102; ^{ 2}江西省林业科学院, 南昌 330032)

出版日期:2013-10-18 发布日期:2013-10-18

Effects of land use change on soil labile organic carbon in central Jiangxi of China.

DU Man-yi¹, FAN Shao-hui¹, LIU Guang-lu¹, QI Liang-hua¹, GUO Bao-hua¹, TANG Xiao-lu¹, XIAO Fu-ming^2

(¹International Centre for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan, State Forestry Administration, Beijing 100102, China; ^2Jiangxi Academy of Forestry, Nanchang 330032, China)

Online:2013-10-18 Published:2013-10-18

摘要/Abstract

摘要： 选取江西省安福县15年撂荒地和3种林地(毛竹林人工林、木荷次生林、杉木人工林),研究土地利用方式改变对土壤有机碳库以及活性有机碳的影响.结果表明：不同样地的土壤总有机碳、微生物生物量碳、热水浸提有机碳和易氧化态碳均表现为毛竹人工林>杉木人工林>木荷次生林>撂荒地;与对照(撂荒地)相比,3种林地的土壤有机碳含量、碳储量及活性有机碳含量均随土壤深度增加而递减,表层富集现象明显;不同土壤活性有机碳的分配比例明显不同,其中,土壤易氧化态碳占总有机碳的比例最大,微生物生物量碳所占比例最小,土壤总有机碳、微生物生物量碳、热水浸提有机碳和易氧化态碳间的相关性均达到极显著水平.后三者表征了土壤中活性较高部分碳的含量,对土地利用方式的响应较敏感,可以作为评价赣中地区土壤质量和肥力的指标之一.

Abstract: Selecting the 15-year abandoned land (AL) and three forest lands ［Phyllostachys edulis plantation (PE), Schima superba secondary forest (SS), and Cunninghamia Lanceolata plantation (CL)］ in Anfu County of Jiangxi Province as test objects, this paper studied the effects of land use change on the soil organic carbon (SOC) pool and soil labile organic carbon (SLOC) contents. The soil organic carbon (SOC), microbial biomass carbon (MBC), hot water extractable carbon (HWC), and readily oxidizable carbon (ROC) contents in the test lands were all in the order of PE>CL>SS>AL. As compared with those in AL, the SOC content, soil carbon stock, and soil labile organic carbon (SLOC) contents in the three forest lands all decreased with increasing soil depth, and had an obvious accumulation in surface soil. The proportions of different kinds of SLOC to soil total organic carbon differed markedly, among which, ROC had the highest proportion, while MBC had the smallest one. There existed significant relationships between SOC, MBC, HWC, and ROC. The MBC, HWC, and ROC contained higher content of active carbon, and were more sensitive to the land use change, being able to be used as the indicators for evaluating the soil quality and fertility in central Jiangxi Province.

杜满义1,范少辉1**,刘广路1,漆良华1,郭宝华1,唐晓鹿1,肖复明2. 土地利用方式转变对赣中地区土壤活性有机碳的影响[J]. 应用生态学报.

DU Man-yi1, FAN Shao-hui1, LIU Guang-lu1, QI Liang-hua1, GUO Bao-hua1, TANG Xiao-lu1, XIAO Fu-ming2. Effects of land use change on soil labile organic carbon in central Jiangxi of China.[J]. Chinese Journal of Applied Ecology.