| Highly effective Sinorhizobium meliloti was inoculated to alfalfa(Medicago sativa L.) which was planted with tall fescue(F.arundinacea Schreb),smooth bromegrass(Bromus inermis Leyss.) and ryegrass(L.multiflorum Lam.) to establish gramineous grass/alfalfa mixtures.Compared with the control(uninoculating treatment),in alfalfa/tall fescue mixture,the biomass yield of alfalfa was increased by 17%,that of tall fescue was increased by 15.1%,and the total yield was increased by 16.3%;in alfalfa/smooth bromegrass mixture,the biomass yield of alfalfa was increased by 14.0%,that of smooth bromegrass was increased by 51.0%,and the total yield was increased by 20.5%;in alfalfa/ryegrass mixture,the biomass yield of alfalfa was incraesed by 7.6%,that of ryegrass was increased by 4.8%,and the total biomass yield was increased by 6.8%.The results indicated that inoculating highly effective Sinorhizobium meliloti could increase the LER(Land equivalent ratio) and the CR(Competitive ratio) of grass crops. |