川中丘陵区不同土地利用方式的石灰性紫色土土壤腐殖质特征  

Characteristics of Soil Humus in Different Land Use Types in Hilly Area of Central Sichuan Basin

作　　者：刘秋香 刘泉[1,2] 张怡颖 王小国[2] 陈朝镇[1] LIU Qiuxiang;LIU Quan;ZHANG Yiying;WANG Xiaoguo;CHEN Chaozhen(School of Resource and Enviromental Engineering,Mianyang Teachers' College,Mianyang,Sichuan 621006;Chengdu Institute of Mountain Disasters and Environment,Chinese Academy of Sciences,Chengdu,Sichuan 610041)

机构地区：[1]绵阳师范学院资源环境工程学院,四川绵阳621006 [2]中国科学院成都山地灾害与环境研究所,四川成都610041

出　　处：《绵阳师范学院学报》2019年第2期111-116,共6页Journal of Mianyang Teachers＇ College

基　　金：四川省教育厅项目(16ZB0311);四川省科技厅项目(2018JY0223);绵阳师范学院研究生创新项目(XYCCX201809);绵阳师范学院研究生培养质量项目(XY-ZLGC201607;XY-ZLGC201401);绵阳师范学院教学改革项目(Mnu-JY16128;Mnu-JY1758)

摘　　要：以川中丘陵区石灰性碱性紫色土为研究对象,初步分析了林地、旱地、水田和撂荒地土壤腐殖质组成和性质,并探讨土壤腐殖质与土壤全氮含量关系.结果表明:(1)表层和亚表层土壤腐殖质含量均为林地最高,其次为旱地、水田、撂荒地.根据我国土壤肥力分级标准,林地、水田、旱地表层(L1)土壤腐殖质含量中等,撂荒地含量偏低;(2)四种土地利用方式表层和亚表层(L2)土壤腐殖质组成中,均以胡敏素碳相对数量最高,除水田亚表层土壤胡敏酸碳含量高于富里酸碳含量外,其他三种土地利用方式的土壤富里酸碳的相对数量均高于胡敏酸碳相对数量;(3)四种土地利用方式表层土壤H/F值均小于1,表明川中丘陵区碱性紫色土为富里酸型土壤.四种土地利用方式表层土壤的腐殖化程度从高到低依次为:旱地>林地>水田>撂荒地.同种利用方式下,旱地、撂荒地表层和亚表层土壤腐殖质腐殖化程度无显著差异.水田、林地亚表层土壤腐殖质腐殖化程度均高于亚表层;(4)腐殖质、胡敏酸、富里酸、胡敏素含量与土壤全氮含量相关系数分别为0. 899、0. 790、0. 682、0. 909,呈线性正相关.Taking calcareous alkaline purple soil in the hilly area of Middle Sichuan as the research object,the composition and properties of humus in soil of paddy field,dryland,woodland and abandoned land were analyzed,and the relationship between soil humus and total nitrogen content in soil was discussed.The result shows that:(1)The humus content in surface and subsurface soils was the highest in woodland,followed by dryland,paddy field and abandoned wasteland.According to the classification standard of soil fertility in China,the humus content of surface layer(L1)of woodland,paddy field and dryland was medium,while that of abandoned wasteland was low;(2)humus content of surface layer and subsurface layer(L2)of four land use patterns was the highest,except humic acid carbon of subsurface layer of paddy field.Except for the content of fulvic acid carbon,the relative amount of fulvic acid carbon in the other three land use patterns was higher than that of humic acid carbon.(3)The surface soil H/F values of the four land use patterns were all less than 1,indicating that the alkaline purple soil in the hilly area of central Sichuan was fulvic acid type.The humification degree of the surface soil of the four land use patterns was in the order of dryland>woodland>paddy field>abandoned wasteland.Under the same utilization mode,there was no significant difference in humification degree of Soil Humus in dry land,abandoned surface layer and subsurface layer.The humification degree of humus in paddy and woodland subsurface soil was higher than that in subsurface soil;(4)The correlation coefficients of humus,humic acid,fulvic acid and humin content with total nitrogen content in soil were 0.899,0.790,0.682 and 0.909,respectively,showing a linear positive correlation.

关 键 词：土壤 胡敏酸 富里酸 腐殖质 胡敏素 土地利用方式 

分 类 号：S151.9[农业科学—土壤学]