Effect of Phosphate-solubilizing Bacteria on Available Phosphorus and Various Forms of Inorganic Phosphorus Contents in Reclaimed Soils
QIAO Zhiwei
HONG Jianping
FANG Zhao
LI Shirong
Abstract：In order to explore the effect of phosphate-solubilizing bacteria on phosphorus(P),the tricalcium phosphate-solubilizing abilities of phosphate-solubilizing bacteria and their combinations were tested using laboratory shake-flask culture,so as to determine the optimal combination,and then the effect of the optimal combination of phosphate-solubilizing bacteria on the available P and various forms of inorganic P contents in reclaimed soils was studied.The results showed that the available P content was the highest in the culture broth of Rahnella sp (W2)+ fluorescent Pseudomonas 1 (W3)+ fluorescent Pseudomonas 2 (W4),which was 609.1 mg/L.Thus,W2+W3+W4 was selected as the optimal combination of phosphate-solubilizing bacteria.The application of fertilizer with optimal combination of phosphate-solubilizing bacteria increased available P content in reclaimed soil,and the order was BG(phosphate-solubilizing bacteria fertilizer+ tricalcium phosphate)>B(phosphate-solubilizing bacteria fertilizer)>MG(matrix+tricalcium phosphate)>M(matrix)>CK(blank).At the corn seedling,jointing and harvest stage,the contents of available P of B treatment significantly increased by 15.7％,119.7％,54.1％ compared with the M treatment,respectively;the contents of available P of BG treatment increased by 55.8％,91.8％,88.9％ compared with the MG treatment,respectively.At the corn seedling and harvest stage,the application of phosphate-solubilizing bacteria fertilizer significantly increased by 86.6％,88.7％,38.6％,83.3％ compared with the M treatment at the harvest stage,respectively;the order of Ca10-P and O-P contents was MG>BG>M>B>CK,the influence of phosphate-solubilizing bacteria on the content of O-P was small,the influence of phosphate-solubilizing bacteria on the content of Ca10-P was big,the Ca10-P contents of B and BG treatments decreased by 5.8％,23.1％ and 9.5％,24.4％ compared with the M and MG treatments,indicating that phosphate-solubilizing bacteria could decrease the content of Ca10-P in reclaimed soil.Soil available P content had significantly positively correlation with contents of Ca2-P,Ca8-P,Al-P,Fe-P,and no significant correlation with the contents of O-P and Ca10-P.
Keywords：phosphate-solubilizing bacteriareclaimed soilsavailable phosphorusvarious forms of inorganic phosphorus
Publication Date：2017-09-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 50-55 )