蚯蚓和有效微生物群对果园土壤镉吸附—解吸及苹果镉含量的影响  

The Effects of Earthworms and Effective Microorganisms on the Adsorption-Desorption of Cadmium in Orchard Soils and Cadmium Accumulation in Apple

作　　者：申为宝[1,2] 杨洪强[1,3] 申洁[4] 乔海涛[1] 

机构地区：[1]山东农业大学园艺科学与工程学院,山东泰安271018 [2]山东省临沂市农业局,山东临沂276001 [3]作物生物学国家重点实验室,山东泰安271018 [4]浙江大学竺可桢学院,杭州310058

出　　处：《园艺学报》2008年第11期1561-1566,共6页Acta Horticulturae Sinica

基　　金：国家自然科学基金项目(30671452;30571285)

摘　　要：以果园棕壤土和3年生盆栽苹果(Malus domestica Borkh.)为试验材料,研究引入蚯蚓和有效微生物群(EM)后,土壤对镉离子(Cd2+)的吸附-解吸行为及苹果根系和果实镉含量的变化。结果表明,随着土壤Cd2+含量增加,土壤对Cd2+的吸附率降低,解吸率提高;Langmuir方程显示,经过蚯蚓和EM处理的土壤对Cd2+的吸附强度和对Cd2+的最大缓冲容量(MBC)下降;在土壤Cd2+含量较高时,蚯蚓和EM降低了土壤对Cd2+的吸附率,提高了解吸率,EM效果更明显。苹果根系和果实镉含量随着土壤施Cd2+而增加,蚯蚓和EM明显促进根系对镉的吸收及镉在果实中的积累,在土壤镉含量较高时,蚯蚓和EM的作用更显著。The Cd^2＋ adsorption - desorption in soil and the content Of Cd^2＋ in roots and fruits were studled by treatment with the earthworm and effective microorganisms （EM）, using the orchard brown soils and potted three-year-old apple trees （Malus domestica Borkh. ） as materials. The results showed that the adsorption ratio of the Cd^2＋ in the soils reduced and the desorption ratio of Cd^2＋ enhanced as the soil Cd^2＋. concentration increasing. According to the Langmuir equation, the adsorption strength and the maximum buffering capacity （MBC） of the soil to Cd^2＋ decreased after the soil was treated with the earthworm and EM. The earthworm and EM reduced the adsorption ratio of the soil for Cd^2＋ and increased Cd^2＋ desorption ratio in the soil of higher Cd^2＋ concentration. And the EM had more obvious effect compared with earthworm. In the root and fruit, Cd content increased with Cd^2＋ concentration increasing in the soil. The earthworm and EM significantly promoted the uptake of Cd^2＋ in the root and the accumulation of Cd^2＋ in the fruit, and the effect was more remarkable when the Cd^2＋ concentration was higher in the soil.

关 键 词：苹果 蚯蚓 微生物 镉 吸附 解吸 

分 类 号：S661.1[农业科学—果树学]