| 围栏封育对不同类型高寒草地植物及土壤养分的影响 |
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| 引用本文： | 王芳,何永涛,付刚,牛犇,张豪睿,李猛,王志鹏,王向涛,张宪洲.围栏封育对不同类型高寒草地植物及土壤养分的影响[J].资源与生态学报（英文版）,2020,11(3):290-297. |
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| 作者姓名： | 王芳 何永涛 付刚 牛犇 张豪睿 李猛 王志鹏 王向涛 张宪洲 |
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| 作者单位： | 中国科学院地理科学与资源研究所生态系统网络观测与重点实验室拉萨高原生态试验站;中国科学院大学;中国科学院大学资源与环境学院 |
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| 基金项目： | The Strategic Priority Research Program of the Chinese Academy of Sciences(XDA19050502);The Strategic Priority Research Program of the Chinese Academy of Sciences(XDA20010201);The National Key Research Projects of China(2017YFA0604801);The National Key Research Projects of China(2016YFC0502001);The National Natural Science Foundation of China(31770477) |
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| 摘 要： | 围栏封育是高寒草地最为常见的保育方式,不同类型草地的封育效应可能会存在差异。开展该方面的研究,可以评估围栏封育对草地恢复的效应,为藏北高原不同类型退化草地的恢复措施提供科学依据。本研究以藏北地区的高寒草甸、高寒草原和高寒荒漠3类草地为研究对象,采用单因素方差分析对生物量、叶片–土壤养分含量以及化学计量比进行差异性检验,探讨了围栏封育对这3类高寒草地植物和土壤养分的影响。结果表明,围栏封育能显著提高这3类草地群落的地上生物量,但仅提高了10–20 cm高寒荒漠的地下生物量;围栏封育显著提高了高寒荒漠优势植物叶片的养分含量和10–20 cm土壤中全氮、全钾、有机碳的含量,并显著改变了C、N、P之间的化学计量比;而在高寒草甸和高寒草原围栏封育仅仅显著增加了高寒草原中优势物种叶片的N含量,其他养分指标和化学计量比均没有表现出显著的差异。以上结果表明,从植物和土壤养分来看,围栏封育对高寒荒漠草地的保育作用最为显著。
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| 关 键 词： | 围栏封育 高寒草甸 高寒草原 高寒荒漠草原 植物养分 土壤养分 |
| 收稿时间： | 2020-03-04 |
Effects of Enclosure on Plant and Soil Nutrients in Different Types of Alpine Grassland |
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| WANG Fang,HE Yongtao,FU Gang,NIU Ben,ZHANG Haorui,LI Meng,WANG Zhipeng,WANG Xiangtao,ZHANG Xianzhou.Effects of Enclosure on Plant and Soil Nutrients in Different Types of Alpine Grassland[J].Journal of Resources and Ecology,2020,11(3):290-297. |
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| Authors: | WANG Fang HE Yongtao FU Gang NIU Ben ZHANG Haorui LI Meng WANG Zhipeng WANG Xiangtao ZHANG Xianzhou |
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| Institution: | 1. Lhasa Plateau Ecosystem Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | Enclosure is one of the most widely used management tools for degraded alpine grassland on the northern Tibetan Plateau, but the responses of different types of grassland to enclosure may vary, and research on these responses can provide a scientific basis for improving ecological conservation. This study took one site for each of three grassland types (alpine meadow, alpine steppe and alpine desert) on the northern Tibetan Plateau as examples, and explored the effects of enclosure on plant and soil nutrients by comparing differences in plant community biomass, leaf-soil nutrient content and their stoichiometry between samples from inside and outside the fence. The results showed that enclosure can significantly increase all aboveground biomass in these three grassland types, but it only increased the 10-20 cm underground biomass in the alpine desert. Enclosure also significantly increased the leaf nutrient content of the dominant plants and contents of total nitrogen (N), total potassium (K), and organic carbon (C) in 10-20 cm soil in alpine desert, thus changing the stoichiometry between C, N and P (phosphorus). However, enclosure significantly increased only the N content of dominant plant leaves in alpine steppe, while other nutrients and stoichiometries of both plant leaves and soil did not show significant differences in alpine meadow and alpine steppe. These results suggested that enclosure has differential effects on these three types of alpine grasslands on the northern Tibetan Plateau, and the alpine desert showed the most active ecological conservation in the responses of its soil and plant nutrients. |
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| Keywords: | enclosure alpine meadow alpine steppe alpine desert steppe plant nutrient soil nutrient |
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