%0 Journal Article
%T Response of Betula luminifera leaf litter decomposition to simulated nitrogen deposition in the Rainy Area of West China<br>华西雨屏区亮叶桦凋落叶分解对模拟氮沉降的响应
%A TU Li-Hua
%A HU Hong-Ling
%A HU Ting-Xing
%A ZHANG Jian
%A LUO Shou-Hua
%A DAI Hong-Zhong
%A <br>涂利华
%A 胡红玲
%A 胡庭兴
%A 张健
%A 雒守华
%A 戴洪忠
%J 植物生态学报
%D 2012
%I Editorial Office of Chinese Journal of Plant Ecology
%X Aims Our objective was to determine the effect of simulated increased nitrogen (N) deposition on decomposition of Betula luminifera leaf litter, under a high wet-nitrogen deposition background. Methods From January 2008 to February 2009, a field experiment of simulated N deposition was conducted in a B. luminifera plantation in the Rainy Area of West China. The levels of nitrogen deposition were control (CK), low, medium and high N (0, 5, 15 and 30 g N·m–2·a–1, respectively). A field experiment using the litterbag method was conducted on the decomposition of leaf litter of B. luminifera. In the end of each month, NH4NO3 was added into N-treated plots. Important findings Despite the high background N deposition, there were significant effects of simulated increased N deposition on B.luminifera leaf litter. N treatments significantly slowed the decomposition of B. luminifera leaf litter through inhibiting the decay of lignin and cellulose. The time of 95% mass loss (T95%) of B. luminifera leaf litter was increased by 1.14–1.96 a from 2.65 a (T95% of CK) caused by simulated N deposition. Simulated N deposition significantly increased the remaining amount of carbon, N, phosphorus, potassium, and magnesium after one year of decomposition. However, calcium release rate was stimulated by simulated N deposition in all three N treatments. The initial chemical characteristics of litter determined the response direction of litter decomposition to simulated N deposition, as well as the nutrient release pattern during litter decomposition.
%K Betula luminifera
%K leaf litter decomposition
%K nitrogen deposition
%K nutrient dynamics
%K Rainy Area of West China<br>亮叶桦
%K 凋落叶分解
%K 氮沉降
%K 养分动态
%K 华西雨屏区
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=2F2173CCFF292BF447DC2681EA33BBAE&aid=1D36885FD7A8294B37E1D20372C827DA&yid=99E9153A83D4CB11&vid=933658645952ED9F&iid=0B39A22176CE99FB&sid=A4FA325EA800C820&eid=6270DC1B5693DDAF&journal_id=1005-264X&journal_name=植物生态学报&referenced_num=0&reference_num=47