石家庄市城乡交错带土壤养分空间特征分析

Analysis on Soil Nutrients Spatial Characters in the Suburb Region of Shijiazhuang City

应用多元统计分析方法,对石家庄市城乡交错带内具有代表性的25个样点的土壤养分含量进行了评分、排序和分类。结果表明:第一主成分主要反映土壤养分的综合含量特征,第二主成分则主要反映土壤速效钾含量的高低,且有机质与全氮和速效磷的相关系数分别为0.906和0.606。土壤养分含量空间分布呈现一定的规律性,且与城乡交错带景观格局空间特征表现一致。西北部速效钾的含量偏高,平均土地景观格局指数S1=4.329;而东南部速效钾含量偏低,S2=3.544。土壤综合养分含量东北部较低,S3=3.511;东南部和西部较高,S4=4.148。

Using multivariate statistical analysis methods, the contents of soil nutrients of 25 representative samples in the suburb region of Shijiazhuang City were scored, sorted and classified. Through principal component analysis, the results concluded that the first principal component reflected the comprehensive contents of soil nutrients, while the second mainly reflected the high or low level of the available K. Meanwhile, the correlation coefficient between organic matter and total nitrogen was 0. 906, and organic matter and available phosphorus was 0. 606. Spatial distribution of contents of soil nutrients expressed some regularity, which was consistent with the landscape space pattern of the suburb region. The content of available K was high in the northwest, the average index of landscape space pattern Sl = 4. 329, and low in the southeast （S2 = 3. 544） . The comprehensive content of the soil nutrients was low in the northeast （S3 = 3. 511 ）, and high in the southeast and the west （S4 = 4. 148） .