| 西双版纳不同森林类型凋落叶与土壤碳氮变化研究 |
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| 引用本文： | 卢同平,张文翔,牛洁,林永静,武梦娟.西双版纳不同森林类型凋落叶与土壤碳氮变化研究[J].热带作物学报,2016,37(8):1526-1533. |
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| 作者姓名： | 卢同平 张文翔 牛洁 林永静 武梦娟 |
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| 作者单位： | 云南师范大学高原湖泊生态与全球变化实验室,云南昆明 650500;云南省高原地理过程与环境变化重点实验室,云南昆明 650098 |
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| 基金项目： | 国家自然科学基金（No. 41461015）；云南省中青年学术技术带头人后备人才（No. 2015HB029）；云南省水利厅（No. 2014003）；江苏省博士后基金（No. 1501060B）。 |
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| 摘 要： | 通过对西双版纳原始林、次生林和橡胶林土壤和凋落叶碳氮含量及碳氮比值间的变化特征研究,探讨林型变化下生态系统中生物化学计量比值的分异规律。研究结果表明:样品中土壤和凋落物氮对C/N值的影响要高于碳。西双版纳土地利用类型决定了土壤和凋落叶的碳氮含量,原始林SOC含量最高,橡胶林初产期(10 a)最低,而STN含量总体上橡胶林要高于原始林和次生林,不同树龄橡胶林土壤氮含量随林龄增加和割胶的进行发生了流失。不同林型间土壤有机碳(SOC)、全氮(STN)和凋落物碳氮比(C/N)的差异性显著,而土壤碳氮比、凋落物碳氮含量与林型相关性较弱。SOC、STN含量与凋落叶碳氮含量具有一定的负相关关系,说明土壤碳氮主要来自凋落物分解后养分的循环过程。
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| 关 键 词： | 不同林型 土壤 凋落叶 氮流失 相关性 生态化学计量学 |
Changes of Withered Leaves and Soil Carbon and Nitrogen in Different Forest Types in Xishuangbanna |
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| LU Tongping,ZHANG Wenxiang,NIU Jie,LIN Yongjing and WU Mengjuan.Changes of Withered Leaves and Soil Carbon and Nitrogen in Different Forest Types in Xishuangbanna[J].Chinese Journal of Tropical Crops,2016,37(8):1526-1533. |
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| Authors: | LU Tongping ZHANG Wenxiang NIU Jie LIN Yongjing and WU Mengjuan |
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| Abstract: | Based on the analysis of the carbon(C)and nitrogen(N)content and C/N of soil and withered leaves in different forest types(e.g. virgin forest, secondary forest, rubber plantation), Xishuangbanna, the distribution characters of stoichiometric ratio in biogeocenose were discussed. The results showed that the effect of N on C/N was higher than that of C. The type of land use was predetermined the C and N content of soil and withered leaves, and the content of soil organic carbon(SOC)was the highest in virgin forest, but the lowest in the rubber plantation(10 years). However, the content of total nitrogen was higher than virgin and secondary forest generally, and the content of N in rubber plantationwas a corresponding increase in rubber ages and tapping. It had significant difference between SOC and STN of soil and C/N of litter in different forest types, and vise versa in C/N of soil and the content of C and N of rubber plantation. The negative correlation, which between SOC, STN and the content of C and N of withered leaves, showed that the C and N of soil were mainly come from the nutrient recycling process. |
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| Keywords: | Different forest types Soil Litter Nitrogen loss Correlation Ecological stoichiometry |
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