哈尔滨建成区土壤养分变异及相关分析

Analysis of variablity of soil nutrients and correlation on built-up area of Harbin

分析哈尔滨建成区土壤有机质和pH变异性与各养分值间相关性，利用GIS软件绘制样点分布图，采用SPSS12软件包进行描述性分析和相关分析。结果表明哈尔滨建成区整体土壤表现为弱碱性，从利用方式上表现出由草地一林地一路边pH呈上升趋势。建成区pH变异均小于10％，表现为弱变异性，其他养分除呼兰区速效磷变异达103．97％为强变异外，其他养分变异均在10％-100％为中等变异。建成区有机质含量范围为15．4～73．3g·kg-1，平均值为45．6g·kg-1，变异幅度为21．23％～69．56％。有机质和全氮、速效钾呈极显著正相关，有机质和全钾、pH呈负相关性但不显著。建成区土壤碱解氮含量较为适中，有效磷、速效钾含量较高。

The paper analyses the variability of SOM and pH values and the content＇s relativity among the nutrients. The paper applied the GIS software to drew the map of samples＇ distribution and applied SPSS12 to analyze the data＇s correlation. The result showed that the urban soil is alkalescent on the whole, the pH value has a increasing tendency from soil in grassland, forest land and roadside. The variability of urban soil pH are all less than 10%. Other nutrient variability are ranging from 10% to 100% except for available phosphorus which reaches 103.97% of Hulan district. The content of SOM content in urban area range from 15.4-73.3 g. kg-1, the average value is 45.6 g- kg1, and variability are ranging from 21.23%- 69.56%. SOM has a significant positive correlation with total N and available K, and took negative correlation with total K and pHo The content of available N is medium, but the content of available P and K is high.