| 贵州毕节地区不同石漠化程度土壤理化性质特征 |
| |
| 引用本文： | 李开萍,刘子琦,李 渊,肖 杰,董晓超,曹 洋.贵州毕节地区不同石漠化程度土壤理化性质特征[J].水土保持学报,2017,31(4):205-210. |
| |
| 作者姓名： | 李开萍 刘子琦 李 渊 肖 杰 董晓超 曹 洋 |
| |
| 作者单位： | 贵州师范大学喀斯特研究院/国家喀斯特石漠化防治工程技术研究中心,贵阳,550001 |
| |
| 基金项目： | 国家“十三五”重点研发计划项目(2016YFC0502607)，贵州省科技计划重大专项(黔科合重大专项字[2014]6007号)，贵州师范大学博士科研启动基金项目(2017) |
| |
| 摘 要： | 为揭示喀斯特地区不同石漠化程度土壤理化性质特征及其影响机制,以贵州毕节石漠化地区土壤为研究对象,在雨季前、中、后对潜在、轻度、中度、强度石漠化程度的土壤进行了为期4年的监测,分析了不同石漠化程度土壤理化性质及其各项指标之间的相关性特征。结果表明:同一石漠化程度下,土壤有机质、全磷、有效磷、全氮和水解氮含量表现为雨季中雨季后雨季前。随着石漠化程度的加深,土壤田间持水量、毛管持水量、毛管孔隙度和总孔隙度升高,全磷、有效磷和有机质含量减少。与潜在石漠化程度相比,轻度、中度和强度石漠化程度的土壤全氮含量分别增加5.6%,20.9%,26.6%,水解氮含量分别增加3.5%,18.3%,36.2%,全钾含量分别增加15.8%,30%,46.3%,速效钾含量分别增加3.9%,11.3%,16.5%。相关性分析结果显示,土壤有机质、全磷、全氮含量、土壤容重、总孔隙度、毛管持水量之间相关性显著(p0.05),其中土壤有机质含量、全氮含量、容重、总孔隙度间相关性极显著(p0.01)。研究结果为石漠化综合治理工作提供理论与科学依据。
|
| 关 键 词： | 石漠化 土壤理化性质 贵州 |
Physicochemical Properties of Soil in Different Rocky Desertification in Bijie Area of Guizhou, China |
| |
| LI Kaiping,LIU Ziqi,LI Yuan,XIAO Jie,DONG Xiaochao,CAO Yang.Physicochemical Properties of Soil in Different Rocky Desertification in Bijie Area of Guizhou, China[J].Journal of Soil and Water Conservation,2017,31(4):205-210. |
| |
| Authors: | LI Kaiping LIU Ziqi LI Yuan XIAO Jie DONG Xiaochao CAO Yang |
| |
| Institution: | School of Karst Science, Guizhou Normal University/State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001 |
| |
| Abstract: | In order to reveal the physicochemical properties and their influence mechanism of soil in different rocky desertification in karst area,a four-year monitoring was conducted on soil in different rocky desertification degrees (potential,light,moderate,intensity) before,during and after rainy season in rocky desertification area,Bijie,Guizhou.Physicochemical properties and their correlation characteristics of different soils were analyzed.The results were as follows:In the soils with the same rocky desertification degree,the contents of soil organic matter,total phosphorus,available phosphorus,total nitrogen and hydrolysable nitrogen were all in order as during rainy season＞after rainy season＞before rainy season.With the deterioration of rocky desertification,soil retention ability,capillary retention ability,capillary porosity and total porosity of soil increased,and the contents of total phosphorus,available phosphorus and organic matter in soil decreased.Compared with the soil in potential rocky desertification degree,total nitrogen contents of soils in light rocky desertification,moderate rocky desertification and intensity rocky desertification increased by 5.6％,20.9％ and 26.6％,respectively,and hydrolysable nitrogen contents of different soils increased by 3.5％,18.3％ and 36.2％,respectively,total potassium contents of different soils increased by 15.8％,30％ and 46.3％,respectively,available potassium contents of different soils increased by 3.9％,11.3％ and 16.5％,respectively.Correlation analysis suggested that organic matter content,total phosphorus content,total nitrogen content,bulk density,total porosity and capillary retention ability correlated significantly (p＜ 0.05),and organic matter content,total nitrogen content,bulk density and total porosity correlated extreme significantly (p＜0.01).These results can provide theoretical and scientific basis for the comprehensive control of rocky desertification. |
| |
| Keywords: | rocky desertification physicochemical properties of soil Guizhou |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《水土保持学报》浏览原始摘要信息 |
| 点击此处可从《水土保持学报》下载免费的PDF全文 |
|
