| 岩溶断陷盆地高原面洼地不同坡位土壤抗蚀性研究 |
| 点此下载全文 |
| 引用本文：刘鹏,蒋忠诚,李衍青,蓝芙宁,于洋,黄映霞.2021.岩溶断陷盆地高原面洼地不同坡位土壤抗蚀性研究[J].地球学报,42(3):373-381. |
| DOI：10.3975/cagsb.2020.091401 |
| 摘要点击次数: 5940 |
| 全文下载次数: 4494 |
|
| 基金项目:国家重点研发专项计划课题(编号: 2016YFC0502503);广西重点实验室建设项目(编号: 19-185-7);国家自然科学基金青年基金(编号: 41502342);国家自然科学基金面上项目(编号: 41471447) |
|
| 中文摘要:为揭示断陷盆地区高原面洼地不同坡位土壤的抗蚀性能, 以高原面洼地不同坡位灌草地(上坡、中坡、下坡、坡底)不同土层(0–20 cm、20–40 cm)土壤为研究对象, 通过对土壤抗蚀性16个指标的测定与分析, 研究了不同坡位对土壤抗蚀性的影响。结果表明: 在不同深度土层中, 土壤水稳性大团聚体含量都呈现出上坡>下坡＞坡底>中坡(P＜0.05), 且随着土层深度的增加含量减少; 各坡位土壤抗蚀性, 0–20 cm土层, 上坡＞下坡＞坡底＞中坡(P＜0.05), 20–40 cm土层, 下坡＞坡底＞上坡＞中坡(P＜0.05), 随着土层深度的增加, 土壤抗蚀性逐渐降低; 粘粒、有机碳、电导、PAD、MWD湿为评价喀斯特断陷盆地坡位土壤抗蚀性的最佳五指标。建议根据各坡位土壤抗蚀性的差异采取不同措施, 减小水土漏失同时增强土壤的抗蚀能力, 以改善当地生态环境。 |
| 中文关键词:断陷盆地 土壤抗蚀性 坡位 洼地 |
| |
| A Study of Soil Anti-erodibility of Different Slope Positions on Plateau Depression in Karst Gabin Basin |
|
|
| Abstract:In order to reveal the anti-erodibility of soil of different slope positions on Plateau depression in karst gabin basin, the authors took the soil of different soil layers (0–20 cm, 20–40 cm) in different slope positions (up slope, middle slope, downhill and slope bottom) in plateau depression area as the research object. Through the determination and analysis of 16 soil anti- erodibility indexes, the influence of different slope positions on soil anti-erodibility was studied. The results are as follows: In different depths of soil layer, the content of soil water stable macro-aggregate is in order of up slope > downhill > slope bottom > middle slope (P＜0.05), decreasing with soil depth. The soil anti-erodibility is in order of 0–20 cm soil layer, up slope > downhill > slope bottom > middle slope(P＜0.05), 0–40 cm soil layer, downhill > slope bottom > upper slope > middle slope (P＜0.05). With the increase of soil depth, soil anti-erodibility gradually decreases; clay, organic carbon, electric conductance, PAD and MWDwet are five best indexes for evaluating the soil anti-erodibility of slope position in karst fault basin. It is suggested that different measures should be taken according to the difference of soil anti-erodibility of different slope positions, so as to reduce water and soil leakage, enhance soil anti erosion capability and improve the local ecological environment. |
| keywords:fault basin soil anti-erodibility slope position depression |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|
