山东省主要果园土壤中Cu、Zn的形态、含量及分布

对我国山东省主要果园土壤中的Cu、Zn元素的形态、含量及分布进行了研究。结果表明 :果园土壤中Cu、Zn元素的全量高于一般粮田土壤。在不同土壤类型中 ,形态分布各具特点 ,Cu元素在棕壤和褐土中的形态分布趋势一致 ,为矿物态 >有机态 >沉淀态 >交换态 ,在潮土和砂姜黑土中一致 ,为矿物态 >沉淀态 >有机态 >交换态 ;而Zn元素在这 4种土壤中的分布趋势相同 ,均为矿物态 >沉淀态 >有机态 >交换态。土壤中交换态的Cu、Zn含量随土壤pH值的增大而减小。Cu、Zn某些形态的含量与土壤中全量间有一定的相关性 ,其中沉淀态Cu与总Cu的关系较为紧密 ,2者呈极显著相关 ;矿物态Zn与总Zn也呈极显著相关。

Forms,Contents and Distribution of Cu,Zn in Some Orchard Soils in Shandong Province

The forms,contents and distribution of Cu,Zn in some orchard soils in Shandong Province were studied.The results showed that the contents of total Cu,Zn in orchard soils were higher than in other agricultural soils.Distribution of the elements varied with soil and form.For Cu,the distributions of different forms of the element showed a similar trend:residual>organically bound>precipitate>exchangeable in brown soil and cinnamon soil and residual>precipitate>organically bound>exchangeable in Chao soil and Shajiang black soil.But the distribution of different forms of Zn element was in the trend of residual>precipitate>organically bound>exchangeable in the four soils.Based on the physical and chemical properties of soils and the contents of total Cu,Zn in the soils studied,it is learned that the distribution of different forms of Cu,Zn elements in some soils is related to the properties of soils.With pH increasing,the contents of exchangeable Cu,Zn decreased in some orchard soils.And the contents of some forms of Cu,Zn are related to the contents of total Cu,Zn.Significant positive correlation existed between precipitate Cu and total Cu with correlation coefficient being 0.824.And so was the relationship between residual Zn and total Zn and its correlation coefficient was 0.993.