Dynamics of litter decomposition and seasonal dynamics of phosphorus in decomposed residua of Calamagrotis augustifolia in the wetland of the Sanjiang Plain |
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| Authors: | Shi-yan Wang Yong-xing Yang |
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| Institution: | (1) Laboratory of Wetland Environment, Changchun Institute of Geography, the Chinese Academy of Sciences, 130021 Changchun, P. R. China |
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| Abstract: | During the period of May to October in 1999, systematical studies were given to the rate of decomposition of Calamagrostis angustifolia litter, the phosphorus content and weight in decomposed residua of litter, and phosphorus content in the corresponding soil
in the Sanjiang Plain. At the same time, the simulation models were listed in the paper. The results showed that the rate
of weight lost of decomposition of Calamagrostis angustifolia litter is 29.80% and the maximum of daily rate of weight lost is 0.25%, which appeared in July. The change trend of phosphorus
content and weight in the decomposed residua of litter is to reduce with the decomposing process, when it comes to the day
of 157, the decrement amount of the both were respectively 57.69mg/kg and 1.6199mg, which were 72.80% and 76.30% of its previous
amount. In addition, there is a polynomial minus correlationship of phosphorus content between the variation in corresponding
soil and the decomposed residua of litter at the corresponding period. The study will be helpful to further understand the
process and mechanism of biochemical cycling of nutrient elements in wetland ecosystems, in addition, it will also be helpful
to the restoration and rebuilding of retrogressive wetlands and reasonable development and utilization of wetlands in the
Sanjiang Plain.
Foundation item: Under the auspices of the National Natural Science Fundation of China (No. 49771002), the Key B Items of
Chinese Academy of Sciences (KZ951-B1-201-3) and the Innovative Project of the Chinese Academy of Sciences (KZCX2-302).
Boigraphy: WANG Shi-yan (1974 -), male, a native of Jinan City, Shandong Province, Ph. D. candidate of Changchun Institute
of Geography, the Chinese Academy of Sciences. His research interests include ecology of wetland environment and application
of remote sensing and GIS. |
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| Keywords: | Calamagrostis angustifolia litter decomposed residua phosphorus seasonal dynamics Sanjiang Plain |
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