接种根瘤菌和菌根真菌对三叶草生长及对土壤Pb2+吸收的影响

采用盆栽实验,设计了不接种(CK)、接种根瘤菌、接种丛枝菌根真菌、双接种根瘤菌和菌根真菌4种处理,探讨了三叶草的生长情况及对土壤中Pb2+吸收的影响。结果表明:三叶草对Pb具有一定的吸收能力,两次采样中,CK处理三叶草Pb浓度分别为15.38mg/kg和15.57mg/kg,均为各处理中最高;接种根瘤菌可明显提高三叶草生物量,接种菌根真菌能明显减少三叶草对土壤中Pb的吸收。接种根瘤菌和菌根真菌减少三叶草对Pb2+的吸收和向地上部运输。

Effect of Inoculating Rhizobium and Mycorrhiza Fungi on the Growth of Clover and Its Absorption of Pb2＊ from Soil

In pot experiments, four treatments consisting of inoculation of rhizobia, inoculation of arbuscular mycorrhizal fungi, inoculation of the both above and non-inoculation as CK were designed to study the effects on clover growth and Pb absorption. The results showed that the clover had a certain capability to absorb Pb. Actually, in the twice samples, as CK the clover Pb concentrations were 15.38 and 15.57mg/kg respectively, being the highest among the four treatments; by inoculation of rhizobia, the biomass of clover was increased, meanwhile by inoculation of arbuscular mycorrhizal fungi the Pb absorption of clover was reduced significantly ; by inoculation of both rhizobia and mycorrhizal fungi reduced the clover Pb absorption from soil, and prevented Pb transport from clover roots to shoots.