Effects of 5 plant growth-promoting rhizobacteria on the growth and quality of Medicago sativa
Five plant rhizosphere growth promoting bacteria (PGPR)isolated from previous research were used as materials to study their effects on alfalfa growth and quality by pot experiment,and the plant height,stem diameter,and contents of crude protein,ether extract and crude fiber were determined under different treatments,in order to provide a basis for utilizing PGPR bacterial fertilizer to obtain high quality and high yield alfalfa in arid and semiarid areas.The re-sults showed that these 5 PGPR strains could promote alfalfa growth and improve quality effectively.However,the effect of different strains varied.The plant height and stem diameter of alfalfa were increased by 11.2% to 75.2% and 4.1% to 22.2% respectively,and the contents of crude protein and ether extract were increased by 6.0% to 20.1% and 3.8% to 1 2.7% respectively.The contents of acid detergent fiber (ADF)and neutral detergent fiber (NDF)were decreased by 1.8% to 3.8%,1.4% to 4.4% respectively.The strain Gnyt1 performed the best effect and shown the potential for fur-ther development and utilization.
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万方数据
维普
