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| 4种亚热带树木凋落叶的分解研究 | |
| 引用本文： | 窦荣鹏,江洪,余树全,马元丹,宋新章,郭培培,张小川.4种亚热带树木凋落叶的分解研究[J].浙江林学院学报,2010,27(2):163-169. |
| 作者姓名： | 窦荣鹏 江洪 余树全 马元丹 宋新章 郭培培 张小川 |
| 作者单位： | 1. 浙江林学院,国际空间生态与生态系统研究中心,浙江,临安,311300 2. 浙江林学院,国际空间生态与生态系统研究中心,浙江,临安,311300;南京大学,国际地球系统科学研究所,江苏,南京,210093 3. 阿尔伯塔大学,可更新资源系,阿尔伯塔,埃德蒙顿T6G2R3 |
| 基金项目： | 国家重点基础研究发展计划(973计划)资助项目，国家自然科学基金资助项目，科学技术部数据共享平台建设项目，国际科技合作计划项目，科学技术部科技基础性工作专项，浙江省科学技术重项目，浙江省森林培育重中之重学科开放基金资助项目 |
| 摘 要： | 选择中国亚热带分布较广的树种马尾松Pinus massoniana,青冈Cyclobalanopsis glauca,香榧Torreya grandis ‘Merrillii’和山核桃Carya cathayensis，采用分解袋法对其凋落叶分解进行研究。结果表明：马尾松凋落叶分解最慢，年分解系数为0.49，香榧分解最快，年分解系数为1.70，分解速率从大到小依次为香榧、山核桃、青冈和马尾松。4种凋落叶的分解速率与初始全氮质量分数呈极显著正相关（P＜0.01），与初始全磷质量分数呈显著正相关（P＜0.05），凋落叶的初始氮、磷质量分数可以作为预测这4个树种在亚热带分解快慢的良好指标。分解过程中马尾松、青冈和山核桃凋落叶的氮和磷均有不同程度的富集现象。青冈和香榧的钾质量分数在前2个月就分别从6.22 和11.16 g·kg-1下降到1.96 和2.05 g·kg-1，之后趋于稳定，马尾松则表现为先下降后升高。图1表6参23 |
| 关 键 词： | 森林生态学 亚热带 凋落叶 分解袋法 养分循环 碳循环 |
Leaf litter decomposition of four tree species in subtropical China |
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| DOU Rong-peng,JIANG Hong,YU Shu-quan,MA Yuan-dan,SONG Xin-zhang,GUO Pei-pei,ZHANG Xiao-chuan.Leaf litter decomposition of four tree species in subtropical China[J].Journal of Zhejiang Forestry College,2010,27(2):163-169. | |
| Authors: | DOU Rong-peng JIANG Hong YU Shu-quan MA Yuan-dan SONG Xin-zhang GUO Pei-pei ZHANG Xiao-chuan |
| Institution: | 1. International Ecological Research Center , Zhejiang Forestry College, Lin＇an 311300, Zhejiang, China; 2. International Institute for Earth System Science, Nanjing University, Nanjing 210093, Jiangsu, China; 3. Renewable Resources, University of Alberta, Edmonton T6G2R3, Alberta, Canada) |
| Abstract: | In order to know its material cycling in the forest ecosystem for better sustainable management,leaf litter of four tree species(Pinus massoniana,Cyclobalanopsis glauca,Torreya grandis,and Carya cathayensis)from subtropical China was studied in a decomposition experiment with nylon bag using a correlation analysis.Leaf litter were collected in Chun'an County of Zhejiang Province,in March of 2006,drying at 80℃ to constant weight,packed with 144 nylon bags,then replaced to evergreen broad-leaf forest's ground surface.Twelve bags were withdrawn once a month.Then determine weight loss rate,and N,P,K,C and lignin contents variation.Results showed that the decomposition rate of T.grandis was fastest,annual decomposition coefficient(k)is 1.70,whereas the slowest was P.massoniana,k=0.49.The correlation analysis was significant for litter decomposition rate and both initial N concentration(r=0.99,P<0.01)and initial P concentration(r=0.97,P<0.05).During litter decomposition,N and P concentrations in leaf litter of Carya cathayensis,P.massoniana,and Cyclobalanopsis glauca increased.Also,rapid decreases were found in the first two months with K concentrations of Cyclobalanopsis glauca(6.22-1.96g·kg~(-1))and T.grandis(11.16-2.05g·kg~(-1));then they decrease slowly.However,P.massoniana decreased(0.88-0.54g·kg~(-1))in the beginning then increased(0.54-1.90g·kg~(-1)).Thus,initial N and P leaf litter concentrations were sensitive indicators for decomposition rates in subtropical China. |
| Keywords: | forest ecology subtropical leaf litter decomposition nutrient cycle carben cycle |
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