华南农业大学学报2018，Vol.39Issue(1)：107-113,7.
外源性氮和磷对火力楠凋落叶分解的影响
Effects of N and P additions on leaf litter decomposition in Michelia macclurei woodland
摘要
Abstract
[Objective]The effects of external nitrogen and phosphorus on leaf litter decomposition rate and changes in N, P, K contents during the decomposition process were studied in a Michelia macclurei woodland to provide a basis for scientific and rational management of M. macclurei plantations.[Method]Four 5 m×5 m sample plots were set in a M. macclurei woodland of Yunyong forest farm, Guangdong Province. Leaf litters were placed in nylon bags and were sprayed with N, P or N+P respectively. The leaf litter decomposition rate and N, P and K contents were determined every three months.[Result]The decomposition rate of leaf litter was significantly accelerated by N, P and N+P additions. After 24 months of deconposition, the leaf litter decomposition rates of the control, N, P and N+P additions reached 52％,66％,78％ and 73％ respectively. N content of leaf litters of the control, N, P and N+P additions increased by 23％,33％,23％ and 31％ respectively, and was significantly higher than their initial N content, among which N contents of leaf litters treated with N and N+P additions were significantly greater than the control. P content of leaf litters of the control, N, P and N+P additions increased by 7％,18％,59％ and 46％ respectively, and was significantly higher than their initial P content, among which P content of leaf litters treated with P or N+P additions was significantly greater than the control. K content of leaf litters changed irregularly, and that treated with N or N+P additions was significantly smaller than the control,while that treated with P addition was significantly greater than the control. Remaining amounts of N and K of leaf litter in the control were significantly greater than the other treatments, and remaining amount of P treated with N addition was significantly less than the control.[Conclusion]N, P and N+P additions can accelerate leaf litter decomposition in M. macclurei woodland, P addition had the best effect. It is suggested that P fertilizer might be added appropriately in M. macclurei woodlands to promote nutrient cycling.关键词
火力楠林/凋落叶/分解速率/外源性N和PKey words
Michelia macclurei/leaf litter/decomposition rate/external N and P分类
农业科技引用本文复制引用
郑欣颖,佘汉基,薛立,蔡金桓..外源性氮和磷对火力楠凋落叶分解的影响[J].华南农业大学学报,2018,39(1):107-113,7.基金项目
中央财政林业科技推广示范项目(2015-GDTK-07) （2015-GDTK-07）
