不同土地利用方式土壤物理性质特征分析  

Characterization of Soil Physical Properties Under Different Land Use Types

作　　者：任婷婷[1] 王瑄[1] 孙雪彤 邱野[2] 李德利 

机构地区：[1]沈阳农业大学水利学院,沈阳110161 [2]沈阳市于洪区水利局,沈阳110141 [3]本溪市水务局,辽宁本溪117020

出　　处：《水土保持学报》2014年第2期123-126,共4页Journal of Soil and Water Conservation

基　　金：辽宁省自然基金项目(201102193)

摘　　要：通过野外调查和室内试验相结合的方法,选择天然次生林、人工林地、坡耕地、荒草地、果树台田和花田6种典型地块作为研究对象,对比分析不同土地利用方式的土壤含水量、容重、团聚体分形特征。结果表明:土壤含水量从坡上到坡下逐渐增加,而土壤容重则表现为:坡下<坡中<坡上;土壤颗粒组成间的差异性较明显,极细沙粒和细砂粒的含量较高,其次是粉砂粒,粘粒含量最低;土壤湿筛团聚体分形维数和风干团聚体分形维数呈现相同的变化规律,其大小依次为天然次生林<荒草地<果树台田<人工林地<坡耕地<花田;湿筛后土壤团聚体分形维数显著增加,以荒草地的增量最小(0.07),花田的增量最大(0.14)。Taking 6 kinds of land use type such as natural secondary forest （NS）, artificial forest land （AF）, slope farmland （SF）, weeds grassland （WG）,fruit machine field （FM）, flower field （FF） as research object, soil bulk density,soil porosity, soil water-holding capacity and fractal features and soil aggregates were stud- ied based on field survey and laboratory experiment. The results showed that： Soil water content of slope in- creased gradually from top to upper to lower,while soil bulk density of slope followed the order as of lower〈 middle%upper. Significant difference was found in soil granular structure under different land use types. Very fine sand and fine sand content was higher, the second was power, clay content was lowest. Wet- screened aggregate fractal dimension of soil and dry aggregate fractal dimension presented the same change rule,in the order of NS%WG〈FM%AF〈SF%FF. After wet-screened, soil fractal dimension increased sig- nificantly, the minimum increment of soil fractal dimension was WG （0.07）, while the maximum increment of soil fractal dimension was FF （0.14）.

关 键 词：土地利用方式 土壤水分 土壤容重 颗粒组成 团粒分形维数 

分 类 号：S152.5[农业科学—土壤学] S152.4[农业科学—农业基础科学]