应用生态学报2011，Vol.22Issue(4)：845-850,6.
UV-B辐射对杉木凋落叶分解的影响
Effects of UV-B radiation on the decomposition of Cunninghamia lanceolata leaf litter
摘要
Abstract
A litterbag experiment was conducted to study the decomposition of Cunninghamia lanceolata leaf litter under ambient and reduced UV-B radiation (22.1％ below ambient) . Comparing with ambient treatment. the reduced treatment decreased the decomposition rate of C. lanceolata leaf litter by 69. 6％ ( P＜0.001 ) . making the relative contents of nitrogen ( N) , phosphorus ( P) ,and lignin in the litter increased by 150％ , 83. 3％ , and 13. 8％ , respectively, and the release of potassium ( K) and carbon ( C) slowed down. In the process of litter decomposition, photo-degradation of lignin didn't play crucial role. The results suggested that UV-B radiation could accelerate the decomposition rate of C. lanceolata leaf litter, promote the release of N. P. K. and C from it.and increase the nutrients turnover rate in litter layer as well as the carbon flux on the ground, giving potential effects on the function of C. lanceolata forest as a carbon source or sink in humid subtropical China.关键词
凋落叶分解/UV-B辐射/营养循环/木质素/杉木分类
农业科技引用本文复制引用
张慧玲,宋新章,张智婷,江洪,王懿祥,白尚斌..UV-B辐射对杉木凋落叶分解的影响[J].应用生态学报,2011,22(4):845-850,6.基金项目
国家自然科学基金项目(30800152,31070440)、浙江省自然科学基金项目(Y5090007)、国家基础研究发展规划重点项目(2010CB950702,2010CB428503)、国家高技术研究发展计划项目(2009AA122001,2009AA122005)、科技部重大基础性研究项目(2007FY110300-08)和浙江农林大学科研启动基金项目(2007FR075)资助. （30800152,31070440）
