田间尺度下农地土壤质量评价——以榆林市榆阳区芹河乡为例  

Evaluation of Soil Quality Under Field Scale——Taking Qinghe Township in Yuyang District in Yulin City as an example

作　　者：杨波[1] 王艳[2] 董莉丽[1] 

机构地区：[1]咸阳师范学院资源环境与历史文化学院,陕西咸阳712000 [2]陕西省榆林市榆阳区农业技术推广中心,陕西榆林719000

出　　处：《咸阳师范学院学报》2016年第2期71-74,共4页Journal of Xianyang Normal University

基　　金：陕西省重点扶持学科建设项目(0602);咸阳师范学院科研基金项目(12XSYK036)

摘　　要：以陕西省榆林市榆阳区芹河乡农地土壤为研究对象,共采集253个土壤样品,选取有机质、碱解氮、有效磷、速效钾、侵蚀度和p H值为主要指标。通过因子分析方法确定该地区土壤质量评价体系,利用Arc GIS9.3绘制土壤质量隶属度评价图。结果表明:利用因子分析方法在该地区进行土壤质量综合评价是客观可行的,该方法较好地反映了该地区土壤质量的实际情况。该地区Ⅰ、Ⅱ、Ⅲ、Ⅳ级耕地所占比例分别为1.21%、36.41%、54.74%、7.63%,西南和东北方向土壤肥力质量较高,西北部和东南部地区土壤肥力质量较低。与第二次土壤普查数据进行比较,碱解氮、有机质有效磷和全氮等各种养分增幅不一致,养分呈现总体含量增加的趋势,但速效钾含量下降,由富钾区向缺钾区转变趋势明显。253 soil samples were collected from the Qinghe township in Yuyang district in Yulin city. Soil organic matter, alkaline nitrogen, available phosphorus, available potassium and erosion degree were seen as comprehensive assessment indexes. Soil quality evaluation system was set up with factor analysis method. The membership functions comprehensive assessment figures were drawn by Arc GIS9.3 to show soil quality spatial variation. The result showed that factor analysis method could evaluate soil quality. The first-class, the second-class, the third-class and the forth-class arable land accounted for 1.21%, 36.41%, 54.74% and 7.63% respectively. Soil quality index was high in south-west and north-east area, while the north-west and south-east area was low. Compared with the second soil survey data,the growth of available nitrogen, available phosphorus and SOM were different. The overall nutrient content showed an increasing trend, but available K content was declining, which was an obvious tendency.

关 键 词：土壤养分评价 GIS空间插值 土壤质量 空间分布 

分 类 号：F321.1[经济管理—产业经济]