三株生防菌对甘蓝根肿病的防治效果及促生作用研究

doi:10.16409/j.cnki.2095-039x.2020.03.017

摘要/Abstract

摘要： 极长链霉菌SL01、淡紫紫孢菌QLP12和非致病镰刀菌Fo47是具有广谱抑菌和促生作用的生防菌。为明确其对甘蓝根肿病的防效及对甘蓝的促生作用，通过种子萌发及苗期生长试验明确了3株生防菌最佳育苗期的使用浓度。温室试验表明，生防菌灌根处理可有效提高对甘蓝根肿病的防效，菌株Fo47和SL01处理的防效可达到90.38%，显著高于药剂处理；菌株QLP12处理的防效为69.78%，显著高于清水处理。田间试验中，菌株Fo47、QLP12和SL01均能表现出较好的生防效果，防效分别可达66.17%、60.20%和51.58%，甘蓝结球鲜重分别比对照增加了29.13%、43.69%和16.5%。品质试验中，3株生防菌都能提高叶片还原糖含量，菌株Fo47和SL01能降低叶片硝酸盐含量。研究表明，3株生防菌能促进甘蓝生长、提高叶片品质，同时对甘蓝根肿病具有很好的防效，为生物菌肥的开发利用提供理论依据。

关键词: 甘蓝根肿病, 生物防治, 促生作用, 品质

Abstract: Streptomyces longissimuss SL01, Paecilomyces lilacinus QLP12 and non-pathogenic Fusarium oxysporum Fo47 are biocontrol strains with significant disease control s and growth- promotion effects on plants. In order to clarify the control efficacy of the three strains on cabbage clubroot and growth-promoting effect on cabbage, the optimum seed-treating concentrations of the three strains were determined by seed germination test and cabbage seedling growth test. Geenhouse experiment showed that root irrigation with the three stains could effectively improve control efficiency on cabbage clubroot. The control efficacies of Fo47 and QLP12 could reach 90.38%, significantly higher than that of chemical treatment, and the control efficacy of QLP12 was 69.78%, significantly higher than that of water treatment. Field trials indicated that Fo47, QLP12 and SL01 all had good biocontrol effects, with the efficacies of 66.17%, 60.20% and 51.58%, respectively, and the increase rates of cabbage fresh weight of 29.13%, 43.69% and 16.5%, respectively. Quality test demonstrated that all the three strains could increase the reducing sugar content in leaves, and Fo47 and SL01 could also reduce the nitrate content in leaves. The above results showed that the three biocontrol strains can not only promote cabbage growth, improve the quality of leaves, but also had good control effect on cabbage clubroot, which provided a theoretical basis for the development and utilization of biofertilizer.

Key words: clubroot of Brassica oleracea, biological control, growth promotion, quality

中图分类号:

S476

贾瑞敏, 胡礼芳, 王彤彤, 马青, 王阳. 三株生防菌对甘蓝根肿病的防治效果及促生作用研究[J]. 中国生物防治学报, 2020, 36(3): 405-413.

JIA Ruimin, HU Lifang, WANG Tongtong, MA Qing, WANG Yang. Studies on Control Efficacy and Growth-Promotion Effect of Three Antagonistic Microbial Strains on Clubroot of Brassica oleracea[J]. Chinese Journal Of Biological Control, 2020, 36(3): 405-413.

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