关键词: 植物根际促生菌, 黑青稞, 产量, 作物营养

Abstract: In order to develop bacterial fertilizer with better growth promoting effect on black highland barley,11 excellent bacterial strains of plant growth promoting rhizobacteria(PGPR)isolated from the rhizosphere of black highland barley were prepared into 11 kinds of PGPR bacterial fertilizer.Total fertilizer(urea 150 kg/ha+calcium superphosphate 120 kg/ha)was used as control(CK),the 11 kinds of bacterial fertilizer above+half dose of chemical fertilizer(urea 75 kg/ha+calcium superphosphate 60 kg/ha)were used as 11 treatments，and they were arranged in randomized blocks in field,to study the effects of PGPR bacterial fertilizer on growth,yield and quality of black highland barley.The results showed that most of the 11 tested PGPR bacterial fertilizers could significantly promote the growth,increase the yield,and improve the nutritional quality of black highland barley when it was treated with PGPR bacterial fertilizer+half dose of chemical fertilizer compared with CK.Among them,the growth promoting effect of bacterial fertilizer SR10‑6 was the most outstanding.Compared with CK,the emergence number,plant height at mature stage,root length at jointing stage,root volume at jointing stage of black highland barley increased by 112.50%,15.05%,22.39% and 5.88% respectively;the 1‑000 grain weight,grain number per spike,yield increased by 6.15%,23.91% and 97 09% respectively compared with CK;the contents of crude fat,phosphorus,potassium and zinc in grains increased by 41.67%，11.31%，17.07% and 55.86% respectively compared with CK.In conclusion,the SR10‑6 strain（Serratia sp.）could be used as an excellent strain for the production and promotion of black highland barley special biological fertilizer.

Key words: Plant growth promoting rhizobacteria, Black highland barley, Yield, Crop nutrition