酸化和有机质积累对茶园土壤铅生物有效性的影响

作者:章明奎;方利平;张履勤 刊名:茶叶科学 上传者:朱一平

【摘要】本文用土培试验研究了质地差异较大的二种茶园土壤酸化和有机质积累引起的水溶性铅、有效态铅和铅的化学形态的变化。结果表明,土壤酸化可显著地促进其它形态的铅向可交换态铅转化,增加土壤铅的水溶性和生物有效性。当土壤pH较高(pH>4)时,增加土壤有机质可促进土壤铅的活化,但在pH较低(pH<4)的土壤中,有机质积累降低了土壤中的有效态铅。酸化和有机质积累对铅的生物有效性影响在砂质土壤比粘质土壤更为明显。

全文阅读

茶叶科学2005,25(3):159—164 Journalof Tea Science 酸化和有机质积累对茶园土壤铅生物有效性的影响 章明奎1,方利平1,张履勤2 (1.浙江大学环境与资源学院资源科学系,浙江杭州,310029;2.浙江省林业勘测设计院,浙江杭州,310020) 摘要:本文用土培试验研究了质地差异较大的二种茶园土壤酸化和有机质积累引起的水溶性铅、有效态铅和铅的化学形态的变化。结果表明,土壤酸化可显著地促进其它形态的铅向可交换态铅转化,增加土壤铅的水溶性和生物有效性。当土壤pH较高(pH>4)时,增加土壤有机质可促进土壤铅的活化,但在pH较低(pH<4) 的土壤中,有机质积累降低了土壤中的有效态铅。酸化和有机质积累对铅的生物有效性影响在砂质土壤比粘质土壤更为明显。 关键词:茶园土壤;酸化;铅;有机质积累;生物有效性 中图分类号:$571.1;S153.6+1 文献标识码:A 文章编号:1000--369X(2005)03一159—06 Effects ofAcidification and Organic Matter Accumulation on Lead Bio-availability in Tea Garden Soils ZHANG Ming—kuil,FANG Li.pin91,ZHANG Lu.qin92 (1.College of Environmental Science and Natural Resources,Zhejiang University,Hangzhou 310029,China; 2.Zhejiang Forestry Surveying and Designing Institute,Hangzhou 310020,China) Abstract:The inej。eased accumulation of lead(Pbl in tea is widely concerned.The study on the factors influencing Pb concentration in tea is necessary for the production of high quality tea.In this study.soils of two tea gardens (Yellowish red soil and Red soil)were collected and incubated by adding acid and organic manure for studying the effects of acidification and organic matter accumulation on Pb bio-availability of tea garden soils.Water-soluble Pb, NH40Ac extractable Pb and chemical forms of Pb in the incubated soils were characterized.The results showed that soil acidification promoted transformation of other forms of Pb into exchangeable Pb,and thus increased water solubility and bio—availability of Pb in the soils.Accumulatio

参考文献

引证文献

问答

我要提问