干旱区生态环境知识资源中心(Arid): Soil Organic Matter Fractions under Different Vegetation Types in Permafrost Regions along the Qinghai-Tibet Highway, North of Kunlun Mountains,China

Arid

	Soil Organic Matter Fractions under Different Vegetation Types in Permafrost Regions along the Qinghai-Tibet Highway, North of Kunlun Mountains,China
	Shang Wen; Zhao Lin; Wu Xiaodong; Li Yuqiang; Yue Guangyang; Zhao Yonghua; Qiao Yongping
来源期刊	Journal of Mountain Science
ISSN	1672-6316
出版年	2015
卷号	12 期号:4 页码:1010-1024
英文摘要	As a key attribute of soil quality, soil organic matter (SOM) and its different fractions play an important role in regulating soil nutrient cycling and soil properties. This study evaluated the soil carbon (C) and nitrogen (N) concentrations in different SOM fractions (light- and heavy fractions, microbial biomass) under different vegetation types and analyzed their influencing factors in continuous permafrost regions along the Qinghai-Tibet Highway in the North of Kunlun Mountains, China. Soil samples were collected in pits under four vegetation types Alpine swamp meadow (ASM), Alpine meadow (AM), Alpine steppe (AS) and Alpine desert (AD) at the depth of 0-50 cm. The vegetation coverage was the highest at ASM and AM, followed by AS and AD. The results indicated that the concentrations of light fraction carbon (LFC) and nitrogen (LFN),and microbial biomass carbon (MBC) and nitrogen (MBN) decreased as follows: ASM > AM > AS > AD, with the relatively stronger decrease of LFC, whereas the heavy fraction carbon (HFC) and nitrogen (HFN) concentrations were lower in AS soils than in the AD soils. The relatively higher proportions of LFC/SOC and MBC/SOC in the 0-10 cm depth under the ASM soils are mainly resulted from its higher substrate input and soil moisture content. Correlation analysis demonstrated that aboveground biomass, soil moisture content, soil organic carbon (SOC) and total nitrogen (TN) positively correlated to LFC, LFN, HFC, HFN, MBC and MBN, while pH negatively correlated to LFC, LFN, HFC, HFN, MBC and MBN. There was no relationship between active layer thickness and SOM fractions, except for the LFC. Results suggested that vegetation cover, soil moisture content, and SOC and TN concentrations were significantly correlated with the amount and availability of SOM fractions, while permafrost had less impact on SOM fractions in permafrost regions of the central Qinghai-Tibet Plateau.
英文关键词	Soil organic matter Light fraction Heavy fraction Microbial biomass Vegetation types Tibetan permafrost soil
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:5480354
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335525
作者单位	Shang Wen, Cryosphere Research Station on Qinghai-Tibet Plateau, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, State Key laboratory of Cryospheric Sciences, Lanzhou, Gansu 730000, China.; Zhao Lin, Cryosphere Research Station on Qinghai-Tibet Plateau, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, State Key laboratory of Cryospheric Sciences, Lanzhou, Gansu 730000, China.; Wu Xiaodong, Cryosphere Research Station on Qinghai-Tibet Plateau, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, State Key laboratory of Cryospheric Sciences, Lanzhou, Gansu 730000, China.; Yue Guangyang, Cryosphere Research Station on Qinghai-Tibet Plateau, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, State Key laboratory of Cryospheric Sciences, Lanzhou, Gansu 730000, China.; Zhao Yonghua, Cryosphere Research Station o...
推荐引用方式 GB/T 7714	Shang Wen,Zhao Lin,Wu Xiaodong,et al. Soil Organic Matter Fractions under Different Vegetation Types in Permafrost Regions along the Qinghai-Tibet Highway, North of Kunlun Mountains,China[J],2015,12(4):1010-1024.
APA	Shang Wen.,Zhao Lin.,Wu Xiaodong.,Li Yuqiang.,Yue Guangyang.,...&Qiao Yongping.(2015).Soil Organic Matter Fractions under Different Vegetation Types in Permafrost Regions along the Qinghai-Tibet Highway, North of Kunlun Mountains,China.Journal of Mountain Science,12(4),1010-1024.
MLA	Shang Wen,et al."Soil Organic Matter Fractions under Different Vegetation Types in Permafrost Regions along the Qinghai-Tibet Highway, North of Kunlun Mountains,China".Journal of Mountain Science 12.4(2015):1010-1024.