中文摘要：

研究东南沿海4个不同海岸带森林群落9个优势种[潺槁木姜子（tsea glutinosa）、湿地松（Pinus elliottii）、木麻黄（Casuarina equisetifolia）、黄连木（Pistacia chinensis）、鳝藤（Anodendron affine）、雀梅藤（Sageretia thea）、榕树（Ficus microcarpa）、簕竹（Bambusa blumeana）、朴树（Celtis sinensis]凋落物初始化学组成及其与分解速率的关系,为海岸带防护林树种选择和合理搭配提供参考.采用网袋法进行分解试验.结果表明：①木麻黄和湿地松凋落物分解最慢,年失重率分别为48.80％和46.00％;潺槁木姜子、黄连木、榕树、簕竹、朴树次之,分别为64.40％、76.80％、69.30％、74.60、71.40％;鳝藤和雀梅藤分解最快,分别为84.00％和81.40％.②Olson指数衰减模型中,木麻黄和湿地松凋落物分解50％与95％所需时间最长,分别为1.0354、4.4750和1.1249、4.8617年,鳝藤和雀梅藤最短,分别为0.3782、1.6347和0.4121、1.7810年.③凋落物分解速率与凋落物初始N、P含量和C/N、C/P比显著相关（P＜0.05）,与C含量和N/P比相关性不显著（P＞0.05）.

英文摘要：

The objective of this study was to research the relationship between the initial chemical composition and its decomposition rates of the litter in 9 dominant species （Litsea glutinosa,Pinus elliottii,Casuarina equisetifolia,Pistacia chinensis,Anodendron affine,Sageretia thea,Ficus microcarpa,Bambusa stenostachya,Celtis sinensis） which are in the four different coastal forest communities in the southeast coast of China,so as to offer the reference for the coastal shelterbelt species selection and their reasonable match.Decomposition test was conducted by the litterbag method.The results showed as follows.（1） The litter decomposition rates of C.equisetifolia and P.elliottii were the lowest,the annual dry mass losses rates were 48.80％ and 46.00％,followed by L.glutinosa,P.chinensis,F.microcarpa,B.stenostachya,and C.sinensis,64.40％,76.80％,69.30％,74.60％,and 71.40％ respectively,while the litter decompose rates ofA.affine and S.thea were the highest,84.00％ and 81.40％ respectively.（2） The time that C.equisetifolia and P.elliottii＇s litter decomposition at 50％ and 95％ required the longest,1.0354,4.4750 and 1.1249,4.8617 years respectively,while A.affine and S.thea required the shortest time,0.3782,1.6347 and 0.4121,1.7810 years respectively.（3） The litter decomposition rates were significantly correlated with the initial N,P content and C/P,C/N ratio （P ＜ 0.05）,but insignificantly correlated with C content and N/P ratio （P＞0.05）.