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- Title
Effects of UV-B radiation on the decomposition of Cunninghamia lanceolata leaf litter.
- Authors
ZHANG Hui-ling; SONG Xin-zhang; ZHANG Zhi-ting; JIANG Hong; WANG Yi-xiang; BAI Shang-bin
- Abstract
A litterbag experiment was conducted to study the decomposition of Cunninghamia lanceolata leaf litter under ambient and reduced UV鄄B radiation (22郾1% below ambient). Comparing with ambient treatment, the reduced treatment decreased the decomposition rate of C. lanceolata leaf litter by 69郾6% (P<0郾001), making the relative contents of nitrogen (N), phosphorus (P), and lignin in the litter increased by 150%, 83郾3%, and 13郾8%, respectively, and the release of potassium (K) and carbon (C) slowed down. In the process of litter decomposition, photo鄄degradation of lignin didn爷t play crucial role. The results suggested that UV鄄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 sub鄄tropical China.
- Subjects
CHINA; CHINA fir; ULTRAVIOLET radiation; CHEMICAL decomposition; NITROGEN; PHOSPHORUS; LIGNINS; CARBON
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2011, Vol 22, Issue 4, p845
- ISSN
1001-9332
- Publication type
Article