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| 四川盆地紫色土小流域土壤的可蚀性 | |
| 引用本文： | 刘泉,李占斌,李鹏,韩建刚.四川盆地紫色土小流域土壤的可蚀性[J].绵阳师范学院学报,2012,31(2):106-109. |
| 作者姓名： | 刘泉 李占斌 李鹏 韩建刚 |
| 作者单位： | 1. 绵阳师范学院资源环境工程学院,四川绵阳621000／中国科学院水利部水土保持研究所,陕西杨凌712100 2. 中国科学院水利部水土保持研究所,陕西杨凌712100／西安理工大学西北水资源与环境生态教育部重点实验室,陕西西安710048 3. 西安理工大学西北水资源与环境生态教育部重点实验室,陕西西安,710048 4. 江苏大学,江苏镇江,212013 |
| 基金项目： | 国家自然科学基金项目，陕西省教育厅科研项目陕西省教育厅重点实验室项目 |
| 摘 要： | 为揭示不同土地利用方式和植被类型对紫色土壤可蚀性的影响,调查和测试了紫色土丘陵区3个典型小流域内林地、园地和旱耕地的表层土壤（0-20 cm）的理化性质,并利用EPIC公式计算了土壤可蚀性K值,结果表明：样地表层土壤（0-20 cm）可蚀性K值大小顺序依次是：SP4〉SP7〉SP5〉SP2〉SP6〉SP3〉SP1;除全磷与K值相关性较小外,K值与其他影响因子达到了显著（极显著）相关;K值与各影响因子之间的相关程度：有机碳〉砂粒〉粉粒=黏粒〉全氮〉全磷。因此,提高有机碳含量,降低化肥的使用量,促进土壤团聚体形成,增加团聚度,是增加紫色土抗蚀性能的重要途径。 |
| 关 键 词： | 土壤可蚀性 K值计算 土地利用 紫色土 四川盆地 |
On Soil Erodibility of Purple-soil in Small Watersheds in Sichuan Basin |
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| LIU Quan,LI Zhan-bin,LI Peng,HAN Jian-gang.On Soil Erodibility of Purple-soil in Small Watersheds in Sichuan Basin[J].Journal of Mianyang Normal University,2012,31(2):106-109. | |
| Authors: | LIU Quan LI Zhan-bin LI Peng HAN Jian-gang |
| Institution: | 1.Mianyang Normal University,Mianyang,Sichuan 621000;2.Institute of Water & Soil Conservation, CAS and MWR,Yangling,Shaanxi 712100;3.Key Lab of Northwest Water Resources and Environment Ecology of Ministry of Education,Xi’an University of Technology,Xi’an Shaanxi 710048; 4.Jiangsu University,Zhenjiang,Jiangsu 212013) |
| Abstract: | In order to reveal the impacts of different patterns of land use and vegetation types on the purple soil erodibility,investigated and monitored the soil properties of surface soil(0-20cm) in forestry land,garden-plot and cultivated land of 3 typical agro-watersheds in purple soil region,and the values of soil erodibility K were calculated by using the EPIC model.Results show that the order of the K is SP4>SP7>SP5>SP2>SP6>SP3>SP1.the K value is lowly correlated with the total phosphorus,while others are significant,and even extremely significant.The correlation of K values and impact-factors is TOC>SAN>SIL=CLA >TN>TP.Thus,the principal countermeasures to improve soil anti-erodibility for the purple soil are to improve the organic matter,reduce the quantity of chemical fertilizer,promote soil-aggregate formation,and increase aggregate ratio. |
| Keywords: | Soil erodibility the K value calculations land use purple soil Sichuan Basin |
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