土壤理化性质对土壤-饲用植物系统铜、锰和锌含量的影响

Effects of Physicochemical Characteristics of Soil on the Contents of Cu,Mn and Zn on the System of Soil to Forage

对云南省巍山、洱源等9个县(市)土壤pH和阳离子交换量(CEC)及土壤和饲料样品的铜、锰和锌元素含量进行测定.结果表明:土壤铜、锰和锌元素含量在中性至酸性范围内,随酸性增强而升高;铜和锰含量元素随土壤保肥力的增强(CEC值的增大)而升高.饲料中锌元素的含量随土壤酸度增强而升高,饲料锰和铜的含量在pH 5-6范围内最高.随着土壤CEC增加,饲料铜含量也随着增加,但锰下降,锌先升后降.

The pH and cation exchange content （CEC） of soil and contents of Cu, Mn and Zn in soil and forage were determined in Weishan country, Eryuan country, Lijian counlry, Yongsheng country, Yuanjiang country,Tonghai country, Luliang country, Yiliang country and Zhaotong country in Yunnan province, The results showed as follow： 1） the contents of Cu, Mn and Zn in soil increased with increasing of acidity in the range of neutral to acid. The contents of Cu and Mn in soil also increased with increasing of keeping fertility （CEC）. The contents Zn in forage increased with increasing of pH of soil, whereas the contents of Mn and Zn in forage is highest when pH is in the range of 5 to 6. The concentration of Cu in forage increased, Mn reduced but Zn reduced after increased with increasing of CEC in soil.