Effects of Bacillus mucilaginosus agents on the quantity of microorganism in ryegrass rhizosphere

This experiment was aimed to investigate the effect of 5 strains of Bacillus mucilaginosus, isolated from rhizospheres of Zea mays (K02), Poa pratensis (K05), Elymus dahuricus (K09), Lolium perenne (K11) and Agrostis palustris (K12) resipectively, on the quantity of microorganism in ryegrass (L.perenne) rhizosphere by using a dilution coating flat method. The result showed that after fertilizing with the agents, the quantities of bacteria and actinomycetes of three different sampling periods in ryegrass rhizosphere were significantly higher than those in control. The fungi quantity of three different sampling periods in ryegrass rhizosphere tended to decrease compared with control. It indicated that the effect of B.mucilaginosus agents on fungus quantity was negative, but they were beneficial to increase the quantities of bacteria and actinomycetes in ryegrass rhizosphere.