Inoculation effects of phosphoric bacteria agent on alfalfa

Inoculated effects of phosphoric bacteria agents on potted alfalfa （Medicago sativa） after 77 d indoor incubation have been evaluated in this study. The results indicated that inoculating the phosphoric bacteria agent could improve alfalfa growth significantly. Compared with control (without the phosphoric bacteria agent), numbers of root nodule and yield of alfalfa increased 32.4% and 45.95%; and contents of WSC, CP and NDF were improved 0.40%, 2.24% and 4.88%, respectively. Compared with a calcium superphosphate treatment, contents of WSC, CP and NDF of potted alfalfa inoculated with the phosphoric bacteria agent were also improved 0.03%, 0.02% and 0.32%, respectively. The suitable dosage of the phosphoric bacteria agent was 22.5 kgha-1 and increased the production by 12.9% compared with application of 750 kgha-1 chemical P and K fertilizer.