【摘要】 １９９２～１９９３年在四川用一种土壤添加剂对烟草和番茄青枯病进行了小区防治试验，当剂量分别为７５克／株和１００克／株时，防治效果分别达５９．６％和７８．９％，显著优于同时参试的农药。盆栽试验结果显示，添加剂的防病机制主要是通过土壤中有益微生物群体而实现的，施用添加剂的土壤比对照土壤中的放线菌和芽孢杆菌的数量增加１０～１０３倍更多还原

【Abstract】 A mixture of soil amendment, similar to S H mixture by Sun and huang from Taiwan, was used at the rates of 1 to 2% (w/w) to control bacterial wilt caused by Pseudomonas solanacearum. Marked effects have been observed in both fiel d and greenhouse trials. The organic and inorganic mixture consisted of 4.4% bag asse, 8.4% rice husk power, 4.25% oyster shell power, 8.25% urea, 2% KNO 3, 12% 3Ca(H 2PO 4) 2·H 2O+7CaSO 4, 5% CaO, 0.3% Na 2B 4O 7, 0.5% ZnSO 4 54 . 9% mineral ash. About 20% chicken manure were added to the mixture at the rial o f tomato field. In naturally infected field of tobacco and tomato by Ps. solan acearum, the amendment could control 59.6% and 78.3% of the disease. Heat trea tment of the soil and mixture by antoclaving, the effects could decline geatly i n greenhouse. The results suggested that the mixture of soil amendment may have suppressed the pathogen through stimulating growth of saprophytic microorganisms , especially Aclinomyces and Bacillus spp.更多还原