Influence of Rhizobium Co-inoculated with Arbuscular Mycorrhiza and Phosphate Solubilizing Bacteria on the Growth of Peanut Tainan 9 variety

Abstract

The study of rhizobium co-inoculated with arbuscular mycorrhiza and phosphate solubilizing bacteria on peanut growth in pot experiment was laid out on completely randomized design (CRD). The experiment consisted of 5 treatments; 1) control (without microorganism), 2) rhizobium (R: Rhizobium sp.),3) R + arbuscular mycorrhiza (R+AM),4) R + Phosphate Solubilizing bacteria (R+PSB: Rhizobium sp. + Bacillus sp.) and 5) R+AM+PSB with 4 replications. The results showed that co-inoculated of microorganisms (R+AM+PSB) provided the highest root length, and the highest fresh weight and dry weight of shoot and root. The treatment of R+AM showed the peak of nodules number (115 nodules/plant), nodules fresh weight and dry weight (0.65 and 0.16 g/plant). R+AM+PSB treatment increased the percentage of AM root length colonized at 26.64%. However, total nitrogen content in peanut shoot was highest in R+PSB. The concentrations of phosphorus and potassium in peanut shoot and root parts were not significant among treatments. Co-inoculate of R and PSB produced the highest nitrogen fixation at 87.73 mg N/plant.