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- Title
Difference and its formation cause in soil organic carbon accumulation capability of two typical tidal wetlands at Dongtan of Chongming Island in Shanghai.
- Authors
Li Yan-li; Xiao Chun-ling; Wang Lei; Zhang Wen-quan; Zhang Shi-ping; Wang Hong-li; Fu Xiao-hua; Le Yi-quan
- Abstract
Through the analyses of soil organic carbon content and vegetation input, this paper studied the difference in soil organic carbon accumulation capability of two typical tidal wetlands, one (A) was on the erosion bank with Phragmites communis and sandy loam soil at southeast Dongtan in Shanghai, and the other (B) was on the alluvial bank with P. communis, Spartina alterniflora, and clay soil at northeast Dongtan of Chongming Island. The main formation causes of the difference were analyzed based on the determinations of soil microbial activities and physical-chemical properties. In A, the average soil total organic carbon content was 46.10% (P<0.05) of that in B, while the annual aboveground vegetation dry mass was only 9.16% lower than that in B, illustrating that the soil organic carbon output was higher in A than in B. The total count of soil bacteria and the activities of soil catalase and invertase in A were 3.82 times (P<0.05), 46.81% (P<0.05), and 34.33% (P<0.05) higher than those in B, respectively, and the soil microbial respiration in A was also higher than that in B, which indicated that the stronger soil microbial C- metabolic activity in A was the main cause inducing the lower soil organic carbon accumulation capability. The sandy loam soil in A had higher porosity and lower salinity and moisture, being favorable to the growth of soil microbes and the decomposition of soil organic carbon, while the clay soil in B had higher salinity and moisture but lower microbial activity, leading to the weaker soil organic carbon decomposition and higher organic carbon accumulation.
- Subjects
DONGTAN (China); CHONGMING Xian (China); SHANGHAI (China); CHINA; ORGANIC compound content of soils; CARBON in soils; HUMUS; PHRAGMITES australis; SANDY loam soils; SPARTINA alterniflora; WETLAND ecology; CLAY soils
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2009, Vol 20, Issue 6, p1310
- ISSN
1001-9332
- Publication type
Article