| 退化红壤丘陵区森林凋落物初始化学组成与分解速率的关系 |
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| 作者姓名： | Chen FL Jiang B Zhang K Zheng H Xiao Y Ouyang ZY Tu NM |
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| 作者单位： | 1. 中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京,100085
2. 湖南农业大学农学院,长沙,410128 |
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| 基金项目： | 国家自然科学基金项目(40871130,30600474)资助 |
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| 摘 要： | 通过小盆+凋落袋控制试验,研究了我国南方退化红壤丘陵区8种森林凋落物和4种混合凋落物初始化学组成与分解速率的关系.结果表明:阔叶凋落物中的氮、磷、钾、镁含量显著高于针叶凋落物,木质素、碳含量显著低于针叶凋落物;凋落物分解速率与凋落物初始氮、磷、钾、镁含量呈显著正相关,与凋落物初始碳、木质素含量以及木质素/氮、木质素/磷和碳/磷值呈显著负相关;木质素含量解释了凋落物分解速率变异的54.3%,是影响分解速率的最关键因子,凋落物碳、氮、磷含量也与分解速率密切相关,它们与木质素含量一起可解释分解速率变异的81.4%.在退化红壤丘陵区植被恢复过程中,低木质素含量、高氮磷含量的阔叶物种的引入有利于加速凋落物的分解速率和土壤肥力的恢复进程.
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| 关 键 词： | 森林凋落物 化学组成 凋落物分解速率 红壤丘陵区 |
Relationships between initial chemical composition of forest leaf litters and their decomposition rates in degraded red soil hilly region of Southern China |
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| Chen FL,Jiang B,Zhang K,Zheng H,Xiao Y,Ouyang ZY,Tu NM.Relationships between initial chemical composition of forest leaf litters and their decomposition rates in degraded red soil hilly region of Southern China[J].Chinese Journal of Applied Ecology,2011,22(3):565-570. |
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| Authors: | Chen Fa-lin Jiang Bo Zhang Kai Zheng Hua Xiao Yi Ouyang Zhi-yun Tu Nai-mei |
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| Institution: | CHEN Fa-lin1,JIANG Bo1,ZHANG Kai1,ZHENG Hua1,XIAO Yi1,OUYANG Zhi-yun1,TU Nai-mei2(1State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China,2College of Agronomy,Hunan Agricultural University,Changsha 410128,China) |
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| Abstract: | A pot experiment with litter bags was conducted to study the relationships between the initial chemical composition of 8 kind forest leaf litters and 4 kind mixed leaf litters and their decomposition rates in degraded red soil hilly region of Southern China.Comparing with needle-leaf litters,broad-leaf litters had significantly higher contents of N,P,K,and Mg,but significantly lower contents of lignin and C.The decomposition rates of test litters were significantly positively correlated with the litters ini... |
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| Keywords: | forest litter chemical composition litter decomposition rate red soil hilly region of Southern China |
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