不同植被对高寒草原生态系统土壤有机碳组成和水稳性团聚体-OALib.PDFVIP

18 6 草 地 学 报 2010 11 Vol. 18 No. 6 ACTA AGRESTIA SINICA Nov. 2010 1 1 2 2 1 1 2 2 王建林 , 王忠红 , 张宪洲 , 欧阳华 , 常天军, 李 鹏 , 沈振西 , 钟志明 ( 1. , 860000; 2. , 100101) : , 2007 7- 8 , , (TOC) ( SPPC) (H DC) (HWC) :( 0 20 cm) TOC, SPPC, H DC, HWC (P 0.05) ; T OC , SPPC (P 0.01) , HDC HWC , H DC, HWC TOC SPPC (P 0.01) :; ; ; ; :S812. 2 :A : 1007-0435( 2010) 06-0749-09 Effect on Alpine Vegetation of Different Grassland Ecosystems Composed of Soil Organic Carbon and Water Stable Aggregates Content 1 1 2 2 WANG Jian- lin , WANG Zhong-hong , ZHANG Xian-zhou , OUYANG H ua , 1 1 2 2 CHANG Tian-jun , LI Peng , SHEN Zhen-xi , ZHONG Zh-i ming ( 1. Plant Sci-T ech Department, T ibet Agricultural and Animal Husbandry College, Linzhi, Tibet 860000, China; 2. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China ) Abstract: T his study reveals effects of different vegetations on soil organic carbon components and water stable aggregate contents of Qingha-i T ibet Plateau alpine grassland ecosystem. Soil total organic carbon (TOC) , sodium pyrophosphate extraction of organic carbon ( SPPC) , hydrolysis of carbohydrate ( HDC) , hot water extraction of carbohydrates ( HWC) and water-stable aggregates of contents were measured from July to August in 2007. Results show that total organic carbon (T OC) , sodium pyrophosphate extraction of organic carbon ( SPPC) , hydrol