纤维素分解菌与无机磷细菌的相互作用

大多数土壤全磷含量较高 ,但由于其固定能力很强 ,不仅有效磷含量较低 ,而且施入的水溶性磷肥很快转化为无效形态。活化土壤中无效磷库 ,提高其有效性 ,是一个具有重要实践意义的研究课题。研究结果表明 ,土壤中存在许多具活化无效磷功能的微生物 ,尤其在根际土壤中解磷微生物的数量比非根际要多[8] ,这些微生物统称为解磷菌。增加土壤或根际解磷菌的数量 ,就能活化土壤中的无效磷 ,提高磷的利用率。但土壤中的解磷菌大多数是腐生性的 ,其生长繁殖需要碳源 ,而多数情况下 ,土壤碳源很少 ,且主要是农作物残体 ,其主要成分是纤维素和半纤维素 …

Interaction between Cellulose-Decomposing Microorganisms and Inorganic Phosphobacteria

Simply inoculating inorganic phosphobacteria on rice straw powder showed low capacity to release P from phosphate rock.However,the capacity increased largely after adding a small amount of glucose to the straw medium at same time.This capacity was also stronly enhanced very much when both cellulose decomposing microorganisms and inorganic phosphobacteria were inoculated together in the medium.Particularly,the water extractable P in the sand medium was largely augmented when the inorganic phosphobacteria was inoculated following 4 days incubation with inoculating cellulose decomposing microorganisms.