Pedogenic Carbonate and Soil Dehydrogenase Activity in Response to Soil Organic Matter in Artemisia ordosica Community  

作　　者：ZHANG Ning HE Xing-Dong GAO Yu-Bao LI Yong-Hong WANG Hai-Tao MA Di ZHANG Rui S. YANG 

机构地区：[1]College of Life Sciences, Nankai University, Tianjin 300071 (China) [2]Research Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071 (China) [3]Department of Biology, Pennsylvania State University, Pennsylvania 16802 (USA)

出　　处：《Pedosphere》2010年第2期229-235,共7页土壤圈（英文版）

基　　金：Project supported by the National Basic Research Program (973 Program) of China (No. 2007CB106802);the National Natural Science Foundation of China (No. 30970546)

摘　　要：Little attention has been paid to the role of soil organic matter （OM） in the formation of pedogenic carbonate in desert soils. The relationships among soil OM, soil dehydrogenase activity （DHA）, and soil CaCO3 in a plant community dominated by Artemisia ordosica, located on the eastern boundary of Tcngger Desert in the Alxa League, Inner Mongolia, China, were studied to understand whether OM was directly involved in the formation of pedogenic carbonate. The results showed that DHA and CuCO3 positively correlated with OM content, and DHA, OM, and CaCO3 were correlated with each other in their spatial distribution, indicating that abundant OM content contributed to the formation of CaCO3. Therefore, the formation of pedogenic CaCO3 was a biotic process in the plant community dominated by A. ordosica.Little attention has been paid to the role of soil organic matter (OM) in the formation of pedogenic carbonate in desert soils.The relationships among soil OM,soil dehydrogenase activity (DHA),and soil CaCO 3 in a plant community dominated by Artemisia ordosica,located on the eastern boundary of Tengger Desert in the Alxa League,Inner Mongolia,China,were studied to understand whether OM was directly involved in the formation of pedogenic carbonate.The results showed that DHA and CaCO 3 positively correlated with OM content,and DHA,OM,and CaCO 3 were correlated with each other in their spatial distribution,indicating that abundant OM content contributed to the formation of CaCO 3.Therefore,the formation of pedogenic CaCO 3 was a biotic process in the plant community dominated by A.ordosica.

关 键 词：arid area biotic process soil calcium carbonate spatial heterogeneity Tengger Desert 

分 类 号：S153.621[农业科学—土壤学] X703[农业科学—农业基础科学]