The effect of biofertilizer Bradyrhizobium japonicum and mycorrhizal fungus Glomus mosseae and phosphorus in yield of soybean Glycine max L. and the efficiency of using phosphorus fertilizers

Abstract

Two factorial field experiments were conducted in the summer season of the year (2010) under Gypsiferous soil conditions, one sterilized and the other non-sterilized. to study the effect of biofertilizer bacteria Bradyrhizobium japonicum and mycorrhizal fungus Glomus mosseae at defferent levels of phosphorus ( 0, 80, 160 and 240 kg p.ha-1) in yield of soybean) Glycine max L.)and the efficiency of using phosphorus fertilizer. The results obtained can be summarized as follows:Seed yield was increased significantly as effected by inoculation with Rhizobium as compared with un inoculation treatments. as Percentage of increasing in seed yield (40.07 and 50.46%), seeds phosphor uptake ( 58.31 and 86.68%) in the soil sterilized and non sterilized, respectively. Resulted mycorrhizal inoculation increased significantly also in seeds yield and concentration of phosphorus, seeds phosphorus uptake, an increased of percentage of (153.37and 148.05%),(52.17 and 52.38%),(277.93 and 261.06%) in the soil sterilized and non sterilized. The results showed fertilizer phosphate significantly increased as compared with non fertilized, the treatment fertilized level of 160 Kg p.h1, had given higher values in seeds yield, seeds phosphorus content, seeds phosphorus uptake in both experiments. Results showed interaction between inoculation with rhizobium and phosphate fertilization, and interaction between inoculation with mycorrhizal fungi and phosphate fertilization, and triple interaction Rhizobial, mycorrhizal and phosphor, to give the inoculated treatment and fertilized level 160 kgP.ha -1 highest values: in seeds yield, seeds phosphorus content, seeds phosphorus uptake in the soil sterilized and non sterilized, also results showed interaction between inoculation with rhizobium and VAM fungus significantly increased on treatment inoculatied with mycorrhizal fungus single, and treatment inoculatied with rhizobium single, and treatment un inoculatied.The phosphorus use efficiency Increased cleary by inoculation with rhizobium single, and inoculation with mycorrhiza fungus single, and interaction between rhizobium and mycorrhiza, as were ( 11.50, 25.05 and 34.47 kg seeds / Kg p) added and (11.16, 19.76 and 30.28 kg seeds / kg p) added, while treatment non inoculatied (4.29 and 3.27 kg seeds / kg p) added, respectively.

Keywords

Biofertilizer, P, Soybean