| 植被恢复过程中芒萁覆盖对侵蚀红壤氮组分的影响 |
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| 引用本文： | 聂阳意,陈坦,吕茂奎,张康靖,曾敏,邓翠,任寅榜,谢锦升.植被恢复过程中芒萁覆盖对侵蚀红壤氮组分的影响[J].生态学报,2018,38(19):6964-6971. |
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| 作者姓名： | 聂阳意 陈坦 吕茂奎 张康靖 曾敏 邓翠 任寅榜 谢锦升 |
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| 作者单位： | 谢锦升12;福建师范大学地理科学学院;湿润亚热带山地生态国家重点实验室培育基地;湿润亚热带生态-地理过程省部共建教育部重点实验室 |
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| 基金项目： | 国家自然科学基金项目（31370465）；国家重点研发计划项目（2016YFD0600204） |
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| 摘 要： | 氮素是限制陆地生态系统生产力的重要因子。采用时空代换法,以红壤侵蚀区未治理、恢复12年和30年的马尾松林为研究对象,对比分析了林下芒萁覆盖地与裸地表层土壤之间氮同位素、不同形态氮组分含量以及不同组分氮含量所占比例之间的差异。结果表明:在所有马尾松林中,芒萁覆盖增加了表层土壤的全氮含量,δ~(15)N值则比林下裸地显著降低了33. 8%—83.1%(P0.05)。随着恢复年限增加,林下芒萁覆盖地表层土壤δ~(15)N值显著下降,而林下裸露地δ~(15)N值没有显著变化(P0.05)。不同恢复年限马尾松林的芒萁覆盖地表层土壤微生物生物量氮、可溶性有机氮和铵态氮含量显著高于林下裸地(P 0.05),而硝态氮含量则显著低于林下裸地(P0.05)。随恢复年限增加,表层土壤微生物生物量氮、可溶性有机氮、铵态氮含量均呈增加趋势,而硝态氮含量则呈下降趋势,不同形态氮占全氮比例表现为:微生物生物量氮铵态氮可溶性有机氮硝态氮。相关分析表明土壤δ~(15)N值与硝态氮极显著正相关,与其他氮组分极显著负相关(P0.01)。由此可见,与林下裸地相比,芒萁覆盖在植被恢复过程中有助于提高表层土壤中全氮、微生物生物量氮、可溶性有机氮和铵态氮含量,降低硝态氮的淋溶损失风险,促进土壤氮保持和积累,从而有利于退化红壤生态系统的恢复。
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| 关 键 词： | 植被恢复 芒萁 氮保持 15N稳定同位素 侵蚀红壤 |
| 收稿时间： | 2017/8/27 0:00:00 |
| 修稿时间： | 2018/4/13 0:00:00 |
Effects of Dicranopteris dichotoma coverage on nitrogen components during the vegetation restoration process in eroded red soil |
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| NIE Yangyi,CHEN Tan,L&#; Maokui,ZHANG Kangjing,ZENG Min,DENG Cui,REN Yinbang and XIE Jinsheng.Effects of Dicranopteris dichotoma coverage on nitrogen components during the vegetation restoration process in eroded red soil[J].Acta Ecologica Sinica,2018,38(19):6964-6971. |
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| Authors: | NIE Yangyi CHEN Tan L&#; Maokui ZHANG Kangjing ZENG Min DENG Cui REN Yinbang and XIE Jinsheng |
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| Institution: | College of Geographical Science, Fujian Normal University, Fuzhou 350007, China;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China,College of Geographical Science, Fujian Normal University, Fuzhou 350007, China;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China,College of Geographical Science, Fujian Normal University, Fuzhou 350007, China;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China,College of Geographical Science, Fujian Normal University, Fuzhou 350007, China;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China,College of Geographical Science, Fujian Normal University, Fuzhou 350007, China;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China,College of Geographical Science, Fujian Normal University, Fuzhou 350007, China;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China,College of Geographical Science, Fujian Normal University, Fuzhou 350007, China;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China and College of Geographical Science, Fujian Normal University, Fuzhou 350007, China;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China;Province-Ministry Co-Constructed Ministry of Education Key Laboratory of Humid Subtropical Eco-geographical Process, Fuzhou 350007, China |
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| Abstract: | |
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| Keywords: | vegetation restoration Dicranopteris dichotoma nitrogen fixation 15N stable isotope eroded red soil |
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