杭州市居民区土壤磷的积累和释放潜力

被引：9

作者：

章明奎

符娟林

厉仁安

机构：

[1] 浙江大学资源科学系

来源：

浙江大学学报(农业与生命科学版) | 2004年 / 03期

基金：

浙江省自然科学基金;

关键词：

居民区土壤; 磷积累; 潜在释放; 环境评价; 杭州市;

D O I：

暂无

中图分类号：

S153.1 [土壤化学研究法];

学科分类号：

摘要：

土壤磷的积累会增加磷的流失潜力,影响环境质量.本文对杭州市49个居民区土壤的研究表明,大部分居民区土壤磷积累明显,平均总磷含量约为农业土壤的2倍.86%的居民区土壤的水可溶性磷含量超过10mg/kg;59%的土壤磷饱和度超过25%(环境敏感临界指标).杭州市居民区土壤磷主要以HCl-P为主,占总磷的50%～60%.居民区土壤磷的积累和潜在释放能力随居民区年龄的增加而增加.模拟试验表明,当土壤pH下降至5.0(低磷土壤)或6.5(高磷土壤)时,土壤磷的释放迅速增加.当土壤总磷量超过1.2g/kg时,可使土壤磷的饱和度超过25%,对环境产生潜在的负影响.

引用

页码：66 / 70

页数：5

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