酸性土壤改良剂与生防制剂协同防控香蕉枯萎病的效果

Biocontrol Efficacy on Fusarium Wilt of Banana by the Collaborative of Acid Soil Ameliorant and Biocontrol Materials

将酸性土壤改良剂分别与生防制剂结合,通过温室盆栽试验研究其防控香蕉枯萎病的效果。酸性土壤改良剂分别与放线菌菌剂处理(Act A)和生物有机肥处理(BIOA)的协同防效(61.1%和58.3%)均高于单独施用酸性土壤改良剂(ASA)(49.7%)、放线菌菌剂(Act)(55.6%)和生物有机肥(BIO)的处理(52.8%)。至试验结束时,各处理土壤的p H值显著高于对照(CK)(p<0.05);Act和BIO处理显著降低了香蕉根际尖孢镰刀菌数量(p<0.05);Act A和BIOA处理能显著提高香蕉根际细菌和放线菌数量并降低真菌数量。各处理显著促进香蕉生长,且能提高土壤有机质、有机碳、全氮、速效钾含量和电导率。结果表明,酸性土壤改良剂和生防制剂可有效协同防控香蕉枯萎病。

Fusarium wilt of banana is a lethality soil-borne disease and it is very important to control the threaten.Biocontrol efficacy on Fusarium wilt of banana was evaluated in this study based on greenhouse condition and physiological and biochemical analyzation, and the biocontrol materials were acid soil ameliorant collaborated with bioorganic fertilizer and actinomycetes agents. The results were listed as follows： treatments of collaborative of acid soil ameliorant and biocontrol materials（ Act A and BIOA） showed higher biocontrol efficacy（ 61.1% and 58.3%）than those of Act（55.6%） and BIO（52.8%）, respectively. The soil p H value of ASA, Act, BIO, Act A and BIOA increased to some degree, and significantly higher than that of CK（ 5.13）（p 0.05） at the end of experiment（ 56 days after transplanting）. Application of biocontrol materials could significantly reduce the population of F. oxysporum in banana rhizosphere soil（p0.05） and the collaborative of acid soil ameliorant strengthened this effect. Treatments Act A and BIOA could also significantly increase bacteria population, while decrease fungi population. Compared with CK, the stem diameter, length and biomass of banana plant in all treatments increased significantly and the organic matter, organic carbon, total nitrogen, available potassium and electric conductivity also increased.