干旱区生态环境知识资源中心(Arid): 贵州喀斯特山区土地利用对土壤有机碳及其周转速率的影响

Arid

	贵州喀斯特山区土地利用对土壤有机碳及其周转速率的影响
其他题名	Effects of land use on soil organic carbon and its turnover rate in Karst mountain areas of Guizhou Province
	张文娟 1; 廖洪凯 1; 龙健 1; 李娟 2; 刘灵飞 1
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2014
卷号	33 期号:5 页码:1297-1303
中文摘要	以贵州西南部典型石漠化治理示范区的灌丛、水田、旱地、退耕3年草丛和退耕15年草丛为研究对象,分析了不同层次(0 ~ 10、10 ~ 20和20 ~ 30 cm)土壤有机碳含量及其矿化速率,探讨了喀斯特山区土地利用对土壤有机碳周转速率的影响。结果表明: 5种土地利用类型土壤有机碳平均含量分别为30. 37、31. 24、21. 86、17. 49和22. 50 g·kg~(-1),灌丛和水田的土壤有机碳含量均显著高于旱地、退耕3年草丛和退耕15年草丛(P < 0. 05); 土壤有机碳的矿化规律表现为培养前期矿化速度快,培养中后期逐渐变缓。不同土地利用类型土壤有机碳的矿化速度存在差异,退耕3年草丛和退耕15年草丛的矿化速度较快,旱地的矿化速度快于水田; 0 ~ 10和10 ~ 20 cm 土层,灌丛土壤有机碳半衰期最长,分别为722和639 d,水田土壤有机碳含量及半衰期在各层次均高于旱地及其退耕草地,表明水田可以作为喀斯特山区长期固碳的优势土地利用类型。总之,土地利用,特别是退耕,是影响喀斯特地区土壤有机碳周转速率的重要因素。
英文摘要	To clarify the effects of land-use types on the turnover of soil organic carbon in Karst mountain areas,soil organic carbon content and its mineralization rates were measured in three soil layers (0 - 10,10 - 20,and 20 - 30 cm) under shrub (SR),paddy (PD),dry land (DL),3-year-old grassland converted from cropland (GCC-3),and 15-year-old grassland converted from cropland (GCC-15) in a typical demonstration area of desertification control experiment in southwestern Guizhou. The results showed that the contents of soil organic carbon in SR, PD,DL,GCC-3 and GCC-15 were 30. 37,31. 24,21. 86,17. 49 and 22. 50 g·kg~(-1),respectively. The contents of soil organic carbon in SR and PD were significantly higher than in DL, GCC-3,and GCC-15 (P < 0. 05). The mineralization rate of soil organic carbon was higher at the early stage,and lowered at the later stage. There were differences in the mineralization rate of soil organic carbon among the different land-use types. The mineralization rates of soil organic carbon in GCC-3 and GCC-15 were higher than under the other land-use types,and the mineralization rate of soil organic carbon in DL was higher than in PD. In the 0 - 10 and 10 - 20 cm layers, the longest half-life time of soil organic carbon was all found in SR,being 722 and 639 days in the corresponding layers,respectively. The content and half-life time of soil organic carbon in each of the three soil layers were greater in PD than in DL,GCC-3,and GCC-15,suggesting that PD could be one of the best land uses for long-term carbon sequestration in Karst mountain areas. In short,land use,especially returning cropland to grassland,was an important factor influencing soil organic carbon and its turnover rate in Karst mountain areas.
中文关键词	土地利用 ; 土壤有机碳 ; 周转速率 ; 半衰期 ; 喀斯特山区
英文关键词	land use soil organic carbon turnover rate half-life time Karst mountain area
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5138666
来源机构	贵州师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231645
作者单位	1.贵州师范大学, 贵州省山地环境重点实验室, 贵阳, 贵州 550001, 中国; 2.贵州师范大学地理与环境科学学院, 贵阳, 贵州 550001, 中国
推荐引用方式 GB/T 7714	张文娟,廖洪凯,龙健,等. 贵州喀斯特山区土地利用对土壤有机碳及其周转速率的影响[J]. 贵州师范大学,2014,33(5):1297-1303.
APA	张文娟,廖洪凯,龙健,李娟,&刘灵飞.(2014).贵州喀斯特山区土地利用对土壤有机碳及其周转速率的影响.生态学杂志,33(5),1297-1303.
MLA	张文娟,et al."贵州喀斯特山区土地利用对土壤有机碳及其周转速率的影响".生态学杂志 33.5(2014):1297-1303.