苹果幼树铜、镉分布特征与累积规律研究  

The Distribution and Accumulation of Cuprum and Cadmium in Young Apple Tree

作　　者：张连忠[1] 路克国[1] 杨洪强[1] 

机构地区：[1]山东农业大学园艺学院,泰安271018

出　　处：《园艺学报》2006年第1期111-114,共4页Acta Horticulturae Sinica

基　　金：山东省山区生态资源保护及综合开发利用的研究与示范项目;山东省中青年科学家奖励基金项目(02BS021)

摘　　要：以3年生盆栽苹果(红富士/平邑甜茶)为试材,土壤施入重金属铜(Cu)和镉(Cd)后,于生长季不同时期检测根、枝、叶内铜、镉的含量变化。结果表明,苹果根系、新梢和叶片中Cu和Cd累积量都随着土壤Cu和Cd施入量的增加而增大。从春梢展叶开始,根系和新梢Cu、Cd含量逐渐增加,到春梢停长时达到最高,之后下降;叶片Cu、Cd含量变化比根系和新梢滞后,到秋梢生长期才达到最高。Cu、Cd在不同器官的累积量由高到低为:根系>枝干>新梢>叶片;苹果根系吸收和积累Cu的能力大于Cd,但Cd向地上部的迁移能力大于Cu。The experiment was carried out using pot-cultured three-year-old Fuji apple tree （ Malus pumila/Malus hupehensis Rehd. ） after cuprum （Cu） and cadmium （Cd） applied to soil. The content of Cu and Cd in roots, shoots and leaves was measured during the growing season. The results shows that the accumulation of Cu and Cd in roots, shoots and leaves all increases with the increase of the content of Cu and Cd in soil. The content of Cu and Cd in roots and shoots rises step by step from the period of leaf expanding to the period of new shoot growth and gets the peak at the period of new shoot stopping growth in spring. The change of content of Cu and Cd in leaves lag behind that in roots and shoots. The content of Cu and Cd in leaves get the peak at the period of shoot growth again in autumn. The order of Cu and Cd content from high to low in different parts of apple is root 〉 trunk 〉 shoot 〉 leaf. Root can absorb more Cu. There are more Cu is accumulated in roots and more Cd is transferred to top.

关 键 词：苹果树 铜 镉 重金属 累积 

分 类 号：S661.1[农业科学—果树学]