【摘要】 【目的】本文在接种马铃薯黄萎病病原菌下,研究钾肥及配施枯草芽孢杆菌对马铃薯黄萎病发病率和马铃薯生长的影响。【方法】通过盆栽试验,采用伤根法接种马铃薯黄萎病病原菌的方法。【结果】钾肥配施枯草芽孢杆菌对马铃薯黄萎病的防效要优于单施钾肥,其中试验处理K3VB、K2VB、K1VB处理对马铃薯黄萎病防效分别是相应单施钾肥K3V、K2V、K1V的处理的1. 09、1.67、3. 51倍。施用枯草芽孢杆菌可以使马铃薯植株钾积累量增加,植株钾积累量与马铃薯黄萎病发病率呈显著负相关。试验还发现施用钾肥后对马铃薯株高、根干物重、地上干物重都有显著促进作用,而配施枯草芽孢杆菌后效果更加显著,其中K3B处理的株高、根干物重、地上干物重是K3处理的1. 21、1. 2、1. 14倍。【结论】钾肥及配施枯草芽孢杆菌对马铃薯黄萎病有一定的防控效果,同时也可以促进马铃薯的生长。更多还原

【Abstract】 【Objective】Under potato wilt pathogen inoculation,the effect of potassium fertilizer combined with Bacillus subtilis on the growth and the incidence of Verticillium wilt of potato.【Method】The pot experiment was used to inoculate the pathogen of Verticillium wilt of potato by inoculating root method.【Result】The application of potash fertilizer with Bacillus subtilis to prevent Verticillium wilt of potato was better than that of single application of potassium fertilizer,of which the control effect of K3 VB,K2VB and K1 VB treatments on Verticillium wilt of potato were 1. 09,1. 67,3. 51 times under fertilizer K3 V,K2V and K1 V treatments. Bacillus subtilis increased the potassium accumulation in potato plants,and there was a significant negative correlation between potassium accumulation and potato Verticillium wilt incidence.It was also found that potassium fertilizer had a significant effect on potato height,dry matter weight and aboveground dry matter weight,and the effect of Bacillus subtilis was more significant after applying potassium fertilizer,of which the height of plant,the weight of root dry matter and the weight of dry matter on the ground by K3 B were 1. 21,1. 2 and 1. 14 times of K3. 【Conclusion】Potash fertilizer and Bacillus subtilis had a certain control effect on Verticillium wilt of potato and could also promote the growth of potato.更多还原