| 青藏高原典型草地植被退化与土壤退化研究 |
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| 引用本文： | 郝爱华,薛娴,彭飞,尤全刚,廖杰,段翰晨,黄翠华,董斯扬.青藏高原典型草地植被退化与土壤退化研究[J].生态学报,2020,40(3):964-975. |
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| 作者姓名： | 郝爱华 薛娴 彭飞 尤全刚 廖杰 段翰晨 黄翠华 董斯扬 |
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| 作者单位： | 中国科学院西北生态环境资源研究院沙漠与沙漠化重点实验室, 兰州 730000;中国科学院大学, 北京 100049,中国科学院西北生态环境资源研究院沙漠与沙漠化重点实验室, 兰州 730000,中国科学院西北生态环境资源研究院沙漠与沙漠化重点实验室, 兰州 730000,中国科学院西北生态环境资源研究院沙漠与沙漠化重点实验室, 兰州 730000,中国科学院西北生态环境资源研究院沙漠与沙漠化重点实验室, 兰州 730000,中国科学院西北生态环境资源研究院沙漠与沙漠化重点实验室, 兰州 730000,中国科学院西北生态环境资源研究院沙漠与沙漠化重点实验室, 兰州 730000,中国科学院西北生态环境资源研究院沙漠与沙漠化重点实验室, 兰州 730000 |
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| 基金项目： | 国家自然科学基金项目（41771233） |
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| 摘 要： | 采用野外样方调查和室内分析法,探讨了青藏高原不同退化程度高寒草原和高寒草甸植被群落结构、植物多样性、地上-地下生物量、根系分配及土壤理化特性差异。研究表明:(1)随着退化程度加剧,高寒草原禾草优势地位未改变,高寒草甸优势种莎草逐渐被杂类草取代。(2)随着退化程度加剧,高寒草原地上生物量显著降低(P0.05),高寒草甸地上生物量先保持稳定再下降。高寒草甸地下生物量较高寒草原地下生物量对退化响应更敏感。(3)高寒草原退化过程中,莎草地上物生量变化不明显(P0.05),禾草地上生物量贡献率由88.12%减少至53.54%,杂类草地上生物量贡献率由0.08%增加至42.81%;高寒草甸退化过程中,禾草和杂类草地上生物量先增加后减小,莎草地上生物量占比由69.15%减少至0.04%,杂类草地上生物量占比由12.56%增加至92.61%。(4)随着退化程度加剧,高寒草原根系向浅层迁移,高寒草甸根系向深层迁移。(5)退化对高寒草甸土壤含水量(θ)、土壤有机碳(SOC)、总氮(TN)及土壤容重(BD)影响均比高寒草原更强烈。本研究对青藏高原退化草地恢复治理具有重要的参考价值。
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| 关 键 词： | 高寒草地 退化 植被生产力 植物群落 土壤特性 |
| 收稿时间： | 2018/9/16 0:00:00 |
| 修稿时间： | 2019/9/19 0:00:00 |
Different vegetation and soil degradation characteristics of a typical grassland in the Qinghai-Tibetan Plateau |
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| HAO Aihu,XUE Xian,PENG Fei,YOU Quangang,LIAO Jie,DUAN Hanchen,HUANG Cuihua and DONG Siyang.Different vegetation and soil degradation characteristics of a typical grassland in the Qinghai-Tibetan Plateau[J].Acta Ecologica Sinica,2020,40(3):964-975. |
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| Authors: | HAO Aihu XUE Xian PENG Fei YOU Quangang LIAO Jie DUAN Hanchen HUANG Cuihua and DONG Siyang |
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| Institution: | Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;University of Chinese Academy of Sciences, Beijing 100049, China,Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China,Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China,Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China,Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China,Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China,Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China and Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China |
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| Abstract: | |
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| Keywords: | alpine grassland degradation plant productivity plant community soil properties |
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