Effect of inoculating arbuscular mycorrhizal fungi and rhizobium on soybean by utilizating organic phosphorus source

Organic P was used as phosphorus resource.A pot experiment was carried out to investigate the effect of inoculating arbuscular mycorrhizal fungi and rhizobium on phosphorus uptake by soybean under different P source supplies.Comparing with the control,different phosphorus sources greatly promoted the plants growth,plants dry weight was improved by 9.40%,7.28% and 5.84%,respectively.The results showed that single nodule fresh weight and dry weight both increased due to inoculating AMF and dual inoculation,and the mycorrhizal colonization of dual inoculating soybean was higher than that of AMF inocuating soybean.Comparing with the corresponding non-inoculated control,the P uptaking of Phytate and Lecithin dual inoculation treatment plant was increased 33.78% and 34.96% respectively,dual innoculating rhizobium and mycorrhizal could significantly enhance the phosphorus absorbtion rate of soybean in different P source supplies.Therefore,the results approved that arbuscular mycorrhizal fungi and nitrogen-fixing microoganisms played important roles in facilitating the plants growth.