Study the effect of Rhizobium bacteria, Mycorrhiza fungus and Urea solution dispersion on soybeans performance. (Glycine max L.)

In order to study the effect of Rhizobium bacteria, Mycorrhiza fungus and foliar application of urea on some quantitative and qualitative traits of soybeans under field condition in Ghaemshahr, an experiment was conducted in a Randomized Complete Block design experiment with four replications in 2009. The treatments were1-control(A), 2-Rhizobium bacteria (S), 3-Rhizobium bacteria Mycorrhiza fungus(S), 4-Rhizobium bacteria foliar application of urea (S), 5Rhizobium bacteria ㌧⢮롢 fungus foliar application of urea (S㏥), 6- foliar application of urea (U). The results showed that Rhizobium inoculation, Mycorrhiza fungus and foliar application of urea had not any significant impact on seed yield and yield components of soybean, but it had significant effect onseed protein contents, seed oil and seed number per pod on lateral branches. The results revealed that symbiosis of Rhizobium and Mycorrhiza and foliar application of urea at flowering had significant effect on oil and protein content, and soybean yield and it increased seed number per pods. The leaf area index determined during the the growing season showed that the treatment (S㏥) increased LAI. The highest LAI was produced at 80 days after planting date followed by U treatments at90 days after planting date. The highest dry matter (DM)was produced at treatment S. Plant height, nodule numbers, nodules dry matter had an ascending trend during the growth season in all treatments, M showed the highest plant height at while the control had the lowest plant height, S and M䯥 had the highest nodules dry weight. The control (A) had the lowest nodule dry weight.