内江市公园绿地土壤重金属Cu分布研究

On the Cu Distribution in the Soil of Park Green Land of Neijiang

对内江市大干园、塔山公园、大洲广场、人民公园0-20cm土层中的Cu、有机质和pH值进行研究,以农耕地为对照,结果表明：（1）土壤中Cu含量塔山公园显著低于人民公园,各公园绿地与农耕地差异不显著,各公园绿地土壤Cu为国家一级标准;（2）不同坡位Cu含量总体表现为：下坡＞中坡＞上坡;（3）各绿地土壤pH值为7.4～8.33,有机质含量差异不显著;（4）公园绿地土壤中Cu含量与有机质、pH值之间相关性不显著.

A survey was made of the heavy metal Cu, the organic substances and the pH value in the layer of 0-20cm soil taken from the Daqian Park, Tower Hill Park, Dazhou Square and People＇s Park in Neijiang; and a comparison was made with the farm land and the results showed that ： （1） the Cu content in the soil of Tower Hill Park was significantly lower than that of people＇s Park. No significant difference was found between the green land and agricultural land. The content of Cu in green land is up to the state＇s first-class standard for the soil Cu content; （2） the overall Cu content detected for different positions of slope is.. downsope 〉 mesoslope 〉 upslope; （3） the green land soil pH value were between 7.4 and 8.33, and the difference of organic content was found to be insignificant; （4） the Cu content in soil was not significantly related with the organic matter and pH value.