不同种植模式配施生物有机肥对香蕉枯萎病的防治效果研究

采用完全随机区组试验,研究添加了生防菌株解淀粉芽孢杆菌的生物有机肥在不同耕作模式下对香蕉生长和香蕉枯萎病防治效果的影响。结果表明,在不同种植模式下,施用生物有机肥对香蕉株高、茎围的影响与施用等价格化肥相比无显著差异。施用生物有机肥和采用套作模式均能降低香蕉枯萎病病情指数,其中以香蕉\韭菜套作配施生物肥处理效果最好,在香蕉植株移栽121 d时,其病情指数较香蕉净作配施化肥处理低54.2%。在本试验条件下,与香蕉单作配施化肥相比,香蕉\韭菜套作配施生物有机肥能显著提高根际土壤中可培养细菌数量(p0.05),同时显著降低尖孢镰刀杆菌数量(p0.05)。相关分析表明,土壤中尖孢镰刀杆菌数量与土壤根际可培养细菌数量成显著负相关关系(p0.01),与病情指数成显著正相关关系(p0.01)。

Effects of combining bioorganic fertilizer with different cropping systems on controlling fusarium wilt disease of banana

A randomized block experiment was conducted in micro-plots to study the effects of bioorganic fertilizer mixed with strain AF11b(Bacillus amyloliquefaciens) on the growth of banana plants and the controlling of banana fusarium-wilt disease in different cropping systems.The results show that the effects of the bioorganic fertilization on the growth of banana are not extremely significant in the different cropping systems compared with the chemical fertilization.The disease index is significantly decreased by the bioorganic fertilizer application and intercropping systems.Compared to the control treatment,the combination of the bioorganic fertilizer with intercropping banana and Chinese Leek(Allium tuberosum) shows a good banana resistance to Fusarium oxysporum decreasing disease index by 54.2% after 121 days of transplanting,and at the same time the number of culturable bacteria is increased significantly(P<0.05),while the number of Fusarium oxysporum is decreased significantly(P<0.05).The correlation analysis show that the number of Fusarium oxysporum is negatively correlated with the number of culturable bacteria(P<0.01),while the number of Fusarium oxysporum is positively correlated with disease severity index(DSI)(P<0.01).