复合微生物制剂改善土壤生物学特性和防治烟草黑胫病的研究

烟草是我国重要的经济作物,利用微生物制剂改善土壤性质,防治烟草土传病害是实现绿色防控的重要途径.利用实验室已筛选的多功能有益微生物进行复配,研究了两种复合微生物制剂T1(芽孢杆菌、假单胞菌、不动杆菌)和T2(芽孢杆菌、假单胞菌、鞘氨醇菌)对土壤理化性质的影响以及对烟草黑胫病的防治效果.结果表明,与未施用微生物制剂的对照...

Evaluation of compound microbial agents in management of soil physical and chemical properties and biocontrol of tobacco black shank

Tobacco as the world’s most important non-food agricultural crop has great economic importance in China.It is a vital manner for tobacco green management using microbial agents to regulate soil properties and control soil-borne diseases.In this study,four beneficial bacterial strains were used to make two compound microbial agents which were determined the effect on soil physical and chemical properties and tobacco black shank.Agent T1 was composed by Bacillus sp.S711,Pseudomonas sp.S1130 and Acinetobacter sp.S1063 while T2 included Bacillus sp.S711,Pseudomonas sp.S1130 and Sphingobium sp.S1191.Both agents T1 and T2 increased the enzymatic activities of soil dehydrogenase,urease and sucrase,and also improved soil microbial biomass carbon and nitrogen,even the intensity of soil respiration.Importantly,the results indicated that T2 was more efficient than T1.Compared to agent T1,T2 specifically increased the enzymatic activity of catalase and decreased soil microbial metabolic quotient.Agent T2 had a high control efficiency at 76.4%for tobacco black shank,which is significantly higher than treated by T1,which had a very low control efficiency at 22.7%.These results suggest that the compound microbial agent T2 would be potentially used in soil management and biological control of soil-borne diseases.