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喀斯特石漠化皆伐迹地不同微地形和小生境下的土壤侵蚀差异
殷清慧1,2, 谢世友1,3, 蔡先立4
1.西南大学 地理科学学院, 重庆 400715;2.安顺学院 资源与环境工程学院, 贵州 安顺 561000;3.西南大学 三峡库区生态环境教育部重点实验室, 重庆 400715;4.贵州省普定喀斯特生态系统观测研究站, 贵州 普定 562100
摘要:
[目的]探讨喀斯特山区皆伐迹地不同微地形、小生境下土壤侵蚀的差异,为喀斯特皆伐迹地生态修复及防治提供依据。[方法]研究区采用铁栏围成封闭区域,用测钎法以1m×1m的距离布设测钎,对山地不同微地形、小生境的土壤侵蚀进行原位年监测,用箱图比较其土壤侵蚀深度差异,并作显著性分析。[结果]研究区不同微地形、不同小生境在土壤侵蚀程度上差异明显,微地形土壤侵蚀深度总体呈现为:凸形 > 平直形 > 凹形,微地形与土壤侵蚀呈显著相关。小生境土壤侵蚀平均深度表现为:石沟 > 石土面 > 石侧 > 土面 > 石缝,组间小生境与土壤侵蚀无明显相关,但石沟与土面呈现显著相关。[结论]岩溶区山地皆伐迹地应据微地形、小生境不同,实施差异化生态修复及防治工作,凸形微地形和石沟、石土面小生境是防治的关键。
关键词:  石漠化  皆伐迹地  微地形  小生境  土壤侵蚀
DOI:10.13961/j.cnki.stbctb.2019.04.007
分类号:S157.1;X157.1
基金项目:国家科技支撑计划项目"重庆北碚中梁山喀斯特槽谷石漠化综合治理技术与示范"(2011BAC09B01), "重庆地区喀斯特山地退化生态系统恢复与重建技术开发" (2006BAC01A16);贵州省科技厅联合基金项目(黔科合J字(2013)13号)
Differences of Soil Erosion Between Micro-topography and Microhabitat in Clear-cutting Site of Karst Rocky Desertification Area
Yin Qinghui1,2, Xie Shiyou1,3, Cai Xianli4
1.School of Geographical Sciences, Southwest University, Chongqing 400715, China;2.School of Resource and Environment Project, Anshun University, Anshun, Guizhou 561000, China;3.Key Laboratory of the Three Gorges Reservoir Region's Eco-environment(Ministry of Education), Southwest University, Chongqing 400715, China;4.Puding Karst Ecosystem Research Station, Puding, Guizhou 561000, China
Abstract:
[Objective] The differences of soil erosion between micro-topography, microhabitat in clear-cutting site of the karst region were studied in order to provide suggestions for ecological restoration and control in clear-cutting site of the karst region.[Methods] Soil erosion monitoring method of pin was employed to monitor annually soil erosion in situ (differentmicro-topography, microhabitat) at a distance of 1 m×1 m within a research area enclosed by iron bars, and box chart and significance test were utilized to compare the difference of soil erosion between them.[Results] It was found that significant difference in the degree of soil erosion of different micro-topography and microhabitats in the study area. More specifically, depth of soil erosion of micro-topography manifested an overall scale of convex > flat > concave, while depth of soil erosion of microhabitat demonstrated an overall scale of stone-drain > stone soil surface > the side of stone > soil surface > rock tunnels. There was a significant correlation between micro-topography and soil erosion, while no significant correlation existed between microhabitats and soil erosion in groups, but stone-drain and soil surface were respectively correlate to each other significantly.[Conclusion] Ecological restoration and control should be carried out according to different micro-topography and microhabitat in karst mountain clear cutting site, and the key of control lied in the convex micro-topography, the microhabitat of stone-drain and stone soil surface.
Key words:  rocky desertification  clear-cutting site  micro-topography  microhabitat  soil erosion