| 滇东南喀斯特小生境土壤水分差异性及其影响因素 |
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| 引用本文： | 匡媛媛,范弢.滇东南喀斯特小生境土壤水分差异性及其影响因素[J].浙江农林大学学报,2020,37(3):531-539. |
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| 作者姓名： | 匡媛媛 范弢 |
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| 作者单位： | 云南师范大学 旅游与地理科学学院，云南 昆明 650500 |
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| 基金项目： | 国家自然科学基金资助项目(41661004，41261007) |
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| 摘 要： | 目的 土壤水分是喀斯特石漠化地区植被恢复的关键因子，分析滇东南喀斯特小生境土壤水分差异性及其影响因素，可为喀斯特生态系统的恢复提供科学依据。 方法 以滇东南普者黑峰林湖盆区为研究区，选取石灰岩灌丛、清香木Pistacia weinmannifolia次生林、云南松Pinus yunnanensis人工林下的不同小生境(石沟、石坑、土面)为研究对象，分析小生境土壤水分的差异性及影响因素。 结果 ①各小生境的土壤水分季节性差异显著(P＜0.05)，平均土壤含水率从高到低依次为石沟(42.24%)、石坑(41.63%)、土面(32.98%)，并随着土层深度的增加而减少。②石灰岩灌丛进行自然和人工恢复后，小生境的土壤含水率增加，从高到低依次为清香木次生林(35.80%)、云南松人工林(31.67%)、石灰岩灌丛(29.36%)，自然恢复优于人工恢复。③小生境土壤水分差异性受到生境类型、土壤性质、植被群落的影响，植被往往优先选择生境条件优越的石坑和石沟小生境。不同土层深度的小生境土壤水分差异性受到土壤性质和土壤优先流的影响。 结论 喀斯特石漠化地区进行植被恢复要结合植被群落和小生境类型，优先选择石沟和石坑小生境，自然和人工恢复相结合，以促进喀斯特生态系统的恢复和改善。图4表2参28
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| 关 键 词： | 土壤学 喀斯特 小生境 土壤水分 植被群落 滇东南峰林湖盆区 |
| 收稿时间： | 2019-06-26 |
Differences and influencing factors of soil moisture in karst microhabitats in southeast Yunnan |
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| KUANG Yuanyuan,FAN Tao.Differences and influencing factors of soil moisture in karst microhabitats in southeast Yunnan[J].Journal of Zhejiang A&F University,2020,37(3):531-539. |
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| Authors: | KUANG Yuanyuan FAN Tao |
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| Affiliation: | College of Tourism and Geography Science, Yunnan Normal University, Kunming 650500, Yunnan, China |
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| Abstract: | Objective This study aims to analyze differences in soil moisture and influencing factors of karst microhabitats of the eastern Yunnan Plateau, so as to provide scientific basis for the restoration of karst ecosystems. Method We studied karst niches (stone ditch, stone pit, soil surface) with different vegetation types, including limestone shrub, Pistacia weinmannifolia secondary forest and Pinus yunnanensis artificial mature forest under the forest-lake basin of Puzhehei karst. Result (1) In each niche soil moisture was significantly higher in the rainy season than in the dry season(P＜0.05), and the order of average soil moisture was stone ditch (42.24%)＞stone pit (41.63%)＞soil surface (32.98%). (2) With natural and artificial restoration of limestone shrub, soil moisture increased from natural secondary forest over Pinus yunnanensis plantation to limestone shrub. Pistacia weinmannifolia secondary forest (35.80%)＞Pinus yunnanensis artificial mature forest (31.67%)＞limestone shrub (29.36%). (3) The difference in soil moisture in karst niches was influenced by the type of habitats, soil properties and vegetation type. Vegetation often preferred the karst niches of stone pit and stone ditch with superior habitat conditions. Conclusion Vegetation restoration in karst rocky desertification areas should be combined with vegetation communities and niche types, and stone ditch and stone pit niches should be given priority to vegetation restoration. The combination of natural restoration and artificial restoration can effectively improve karst ecosystems. Ch, 4 fig. 2 tab. 28 ref.] |
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