干旱区生态环境知识资源中心(Arid): 喀斯特石漠化过程中的土壤物理组分有机碳氮研究

Arid

	喀斯特石漠化过程中的土壤物理组分有机碳氮研究
其他题名	Soil Organic Carbon and Total Nitrogen of Soil Physical Fraction in the Process of Karst Rocky Desertification
	卢红梅 1; 王世杰2
ISSN	1000-288X
出版年	2009
卷号	29 期号:5 页码:50-55
中文摘要	以贵州省花江峡谷区典型喀斯特石漠化小流域为研究区域,对潜在、轻度、中度、强度石漠化等级样地代表性土壤物理组分有机碳氮进行了研究.结果表明,石漠化过程中土壤轻组和颗粒组分有机碳和全氮含量都高于矿质组分,轻组和颗粒组分的C/N值都高于全土;轻组、颗粒和矿质组分的有机碳氮含量随石漠化程度的增加而降低,与石漠化过程有一致性,颗粒组分数量和有机碳氮分配比例还与石漠化等级有同步性,而轻组组分数量和有机碳氮分配比例与石漠化等级没有同步性;轻组和颗粒组分中有机碳和氮的富集系数和分配比例不一致,在石漠化过程中轻组和颗粒组分SOC的下降明显快于氮;樵采石漠化的颗粒组分主要是有机质与黏粉粒结合成的有机无机复合体,其中的有机质易被保护;开垦石漠化中的颗粒组分大部分都是有机质与砂粒的结合,其中有机质腐殖化程度低,易被分解.
英文摘要	The research area is a typical karst catchment subject to rocky desertification in Huajiang Gorge, Guizhou Province. One representative soil sample was collected in each plot of strong, medium, light, or latent desertification grade. The research focused on soil organic carbon (SOC) and total nitrogen (TN) of physical fraction in the processes of rocky desertification. Results elucidated that the paniculate organic carbon and nitrogen (POC and PON) and light fraction organic carbon and nitrogen(LFOC and LFON) were higher than the mineral fraction in the process of rocky desertification. The C/N values of particulate fraction and light fraction were higher than those of total soil. The contents of POC, PON, LFOC, and LFON decreased with the increase of rocky desertification grade. The content of particulate fraction and distribution ratio acted in accord with rocky desertification grade, while the above index of light fraction did not act in accord with rocky desertification grade. The enrichment and distribution ratios of POC and PON, as well as LFOC and LFON, were not the same. The decrease of POC and LFOC was faster than that of PON and LFON in the process of rocky desertification. Most POC in wood chopping sequence integrated with silt-clay particle to form organic-inorganic complex, with the integration way POC was protected and was difficult to decompose by microbe, while most POC in reclamation sequence integrated with sand particle, with this kind of integration way SOC tended to be in a low humic degree and to be decomposed by microbe easily.
中文关键词	喀斯特石漠化 ; 土壤物理组分 ; 颗粒组分有机碳 ; 轻组组分有机碳 ; 花江峡谷
英文关键词	karst rocky desertification soil physical fraction particulate organic carbon light fraction organic carbon Huajiang Gorge
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:3736362
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224173
作者单位	1.贵州省发酵工程与生物制药重点实验室, 贵州省发酵工程与生物制药重点实验室, 贵阳, 贵州 550002, 中国; 2.中国科学院,地球化学研究所, 环境地球化学国家重点实验室, 贵阳, 贵州 550002, 中国
推荐引用方式 GB/T 7714	卢红梅,王世杰. 喀斯特石漠化过程中的土壤物理组分有机碳氮研究[J],2009,29(5):50-55.
APA	卢红梅,&王世杰.(2009).喀斯特石漠化过程中的土壤物理组分有机碳氮研究.,29(5),50-55.
MLA	卢红梅,et al."喀斯特石漠化过程中的土壤物理组分有机碳氮研究".29.5(2009):50-55.