广东省林地土壤有效态锌、镉含量及其与有机质和pH的关系  

Available Zn and Cd Contents in Relation to pH and Organic Matter in Forest Soils of Guangdong Province

作　　者：宫彦章[1,2] 刘月秀[1,3] 刘姝媛[1,2] 叶金盛 曾曙才[1,2] 

机构地区：[1]华南农业大学林学院,广东广州510642 [2]农业部生态农业重点开放实验室,广东广州510642 [3]南京林业大学森林资源与环境学院,江苏南京210037 [4]广东省林业调查规划院,广东广州510500

出　　处：《华南农业大学学报》2011年第1期15-18,共4页Journal of South China Agricultural University

基　　金：广东省社会发展计划项目(2008B030302008);农业部生态农业重点开放实验室项目(2010-LH02)

摘　　要：通过对主要森林类型林下土壤进行野外调查和室内测定,研究了粤北、粤东、粤西和珠江三角洲4个地区林地土壤有效Zn、Cd含量、pH和土壤有机质含量,并分析了后二者与有效Zn、Cd的相关关系.结果表明:广东林地土壤A层有效Zn、Cd质量比分别为2.770和0.045 mg.kg-1,B层分别为1.071和0.013 mg.kg-1,A层含量显著高于B层.有效Zn、Cd平均含量以粤北最高,粤东和珠江三角洲次之,粤西最低.土壤有效Zn、Cd含量与有机质含量呈极显著正相关关系.土壤A层有效Zn、Cd含量与pH相关性不显著,B层有效Zn、Cd含量与pH呈显著负相关关系.Based on field soil survey and lab test,contents of available Zn,Cd and their relations to organic matter（OM） and pH values in forest soils of northern,eastern and western parts of Guangdong and Pearl River Delta region were studied and relations between available Zn,Cd and pH,OM were analyzed.Results showed that available Zn and Cd contents in the A horizons of the forest soils were 2.770 and 0.045 mg·kg-1,respectively,and those in the B horizon were 1.071 and 0.013 mg·kg-1,respectively,the latter significantly lower than A horizons.Mean contents of available Zn and Cd in forest soils of northern Guangdong were the highest,followed by those in eastern Guangdong,Pearl River Delta region and western Guangdong in a decreasing order.Contents of available Zn and Cd were found to be significantly positively correlated with OM contents in both A and B horizons,and significantly negatively correlated with pH values in B horizons.

关 键 词：林地土壤 有效锌 有效镉 有机质 PH 

分 类 号：S718[农业科学—林学]