林业科学2012，Vol.48Issue(1)：13-17,5.
UV-B辐射对亚热带森林凋落叶分解的影响
Effects of UV-B Radiation on Leaf Litter Decomposition in Humid Subtropical Region in China
摘要
Abstract
The leaf litter decomposition of six representative tree species, Cunninghamia lanceolata, Pinus massoniana, Schima superba, Cinnamomum camphora, Cyclobalanopsis glauca and Castanopsis eyeri, in subtropical region was investigated with litterbag method under ambient and reduced ultraviolet-B ( UV-B ) radiation (22. 1 % below ambient) treatments. The results showed that there were differences in litter mass remaining rates of each species under two UV-B radiation treatments, except for a few decay stages during decomposition, and the difference became more obvious with decay time. The reduced UV-B significantly decreased the litter decomposition rates of six species by an extent from 33.3% for C. Camphora to 69.6% for C. Lanceolata (P < 0.01). Both UV-B radiation treatment and litter type significantly affected litter decomposition rate ( P < 0. 001 ) , with a stronger effect of UV-B radiation than litter type. There were significantly negative correlations between decomposition rate and C = N ratio of leaf litter under both ambient and reduced UV-B radiation treatments (P <0. 05).关键词
凋落叶分解/UV-B辐射/亚热带/光降解/淋溶Key words
leaf litter decomposition/UV-B radiation/subtropical region/photodegradation/leaching分类
农业科技引用本文复制引用
宋新章,张慧玲,江洪,余树全..UV-B辐射对亚热带森林凋落叶分解的影响[J].林业科学,2012,48(1):13-17,5.基金项目
国家自然科学基金项目(30800152,31070440) （30800152,31070440）
浙江省自然科学基金项目(Y5090007) （Y5090007）
国家基础研究发展规划重点项目(2010CB950702,2010CB428503) （2010CB950702,2010CB428503）
科技部重大基础性项目(2007FY110300-08) （2007FY110300-08）
浙江农林大学科研启动基金项目(2007FR075) （2007FR075）
