克拉玛依农业开发区不同土地利用方式下土壤质量的特征研究

以克拉玛依农业开发区为研究区，采用野外调查与室内分析相结合的方法，研究克拉玛依农业开发区不同土地利用方式下土壤质量的特征变化。样品分析结果表明：土壤pH值在7．52～8．60，呈碱性。土壤全磷、全钾、容重、pH值变化不明显，而土壤速磷、碱解氮、速钾、有机质含量变异较大。主成分分析结果显示：第一、二、三个主成分的累计贡献率为72．22％，可以作为对土壤质量的概括。通过对不同土地利用方式下的土壤等级划分得出：不同土地利用方式下的土壤质量依次为耕地〉人工草地〉林地〉荒地，并针对不同类型提出了改善措施。

Study on Soil Qualitative Characteristics of Different land Utilization Way in Agricultural Development Zones of Karamay

The change of characteristics of soil quality in Karamay Agricultural Development zones was studied under different land utilization way,based on the field investigated data and analyzed results in laboratory.The results showed that the pH values of soils vary in a range of 7.52-8.60,the total P,K,bulk density and pH values were little variable compared with the available N,P,K and organic matter content;the results of principal component analysis of soil nutrients revealed that the contribution ratio of the first,second and third principal component was 72.22% as a conclusion of the soil quality.By dividing the soil grade under the different land utilization way,the arrange of order of the soil quality was:the farmlands > the manmade grasslands >the plantation> the wilds;Moreover,some measures are put forward.