干旱区生态环境知识资源中心(Arid): 贺兰山西坡不同海拔梯度土壤活性有机碳分布特征及影响因子

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	贺兰山西坡不同海拔梯度土壤活性有机碳分布特征及影响因子
其他题名	Distribution Characteristics and Influencing Factors of Soil Active Organic Carbon at Different Elevations on West Slope of Helan Mountain
	孙海燕 1; 万书波 2; 李林 1; 刘登望 1
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2014
卷号	28 期号:4 页码:194-199,205
中文摘要	研究了贺兰山不同海拔梯度土壤活性有机碳(SAOC)的垂直分布特征及其与气候因子、植被特征和土壤特性的关系。结果表明:SAOC随海拔增加而增加,垂直方向随土层深度的增加呈T形分布特征,各海拔间差异均显著(P<0. 05)。相关性分析表明:不同海拔梯度SAOC与土壤有机碳(SOC)、含水量、全氮、植被盖度和多样性指数呈极显著线性正相关(P<0. 01),与PH、土壤温度和土壤容重呈极显著线性负相关(P<0.01),与年降雨量、年均气温、地上和地下生物量无线性相关性(P>0.05);SAOC占总有机碳的比例变化范围在7. 9%?12.0%之间,以高寒草甸(AM)所占比例最高,草原化荒漠(DS)最低。偏相关分析显示,影响0 20 cm 土层SAOC最主要的因子是有机碳、多样性指数、植被盖度和年降水量,影响20 40 cm 土层SAOC的最主要因子是年降雨量和地下生物量,影响40 60 cm 土层SAOC最主要的因子是植被盖度和地下生物量,影响60 80 cm 土层SAOC最主要的因子是pH、含水量和地下生物量。综合分析比较可知,有机碳、多样性指数、植被盖度、年降水量、地下生物量、pH和含水量可能是影响SAOC垂直分异的关键因子,而土壤有机碳、全氮、含水量、植被盖度、pH、土壤容重和温度可能是影响SAOC沿海拔梯度分异的关键因子。
英文摘要	The soil active organic carbon (SAOC) at different elevations on the west-slope of Helan mountain in Alxa,Inner Mongolia was studied. Factors which affected SAOC distribution such as climatic variation, vegetation and soil characteristics were measured. The results indicated that SAOC declined with decreasing altitude which were significantly difference between the altitude and showed a decline along the vertical soil profile with a T shape distribution. Correlation analysis showed that SAOC was a significant linear positive correlation with water content, soil organic carbon, total nitrogen, the diversity index and vegetation coverage (P<0. 01),significant linear negative correlation with pH, soil temperature and soil bulk density (P< 0.01),no significant linear correlation with annual rainfall,annual average temperature,above and underground biomass (P>0. 05). SAOC accounted for 7. 9%?12. 0% of the soil organic carbon which the highest in alpine meadow(AM) and lowest in desert steppe(DS). Partial correlation analysis showed that the most important factors affecting SAOC in the 0 20 cm soil layers was soil organic carbon, diversity index, plant coverage and annual precipitation, in the 20-40 cm soil layers, SAOC was mostly affected by annual precipitation and underground biomass, SAOC was mostly affected by plant coverage and underground biomass in the 40-60 cm soil layers and the mostly important factors affecting SAOC in the 60-80 cm soil layers was pH, moisture content and underground biomass. Comprehensive analysis and comparison of these factors, soil organic carbon, diversity index, plant coverage,annual precipitation and underground biomass,pH and moisture content could be the key factors of the soil vertical differentiation of SAOC, while soil organic carbon, total nitrogen, moisture content, plant coverage, pH, soil bulk density and temperature could be the key factors of the elevation gradient differentiation of SAOC.
中文关键词	贺兰山 ; 海拔梯度 ; 土壤活性有机碳 ; 分布特征 ; 影响因子
英文关键词	Helan mountain elevations soil active organic carbon distribution characteristics influencing factors
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:5218864
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231772
作者单位	1.湖南农业大学生物科学技术学院, 长沙, 湖南 410128, 中国; 2.山东省农业科学院, 济南, 山东 250100, 中国
推荐引用方式 GB/T 7714	孙海燕,万书波,李林,等. 贺兰山西坡不同海拔梯度土壤活性有机碳分布特征及影响因子[J],2014,28(4):194-199,205.
APA	孙海燕,万书波,李林,&刘登望.(2014).贺兰山西坡不同海拔梯度土壤活性有机碳分布特征及影响因子.水土保持学报,28(4),194-199,205.
MLA	孙海燕,et al."贺兰山西坡不同海拔梯度土壤活性有机碳分布特征及影响因子".水土保持学报 28.4(2014):194-199,205.