Abstract: Abstract：In order to clarify the eff ectiveness of the combined application of diff erent amounts of dazomet and microbial agents in preventing tomato soil borne diseases，a greenhouse plot experiment was conducted using conventional fertilization as a control（CK）．The eff ects of 20 g · m-2 and 40 g · m-2 amounts of dazomet combined with Trichoderma harzianum agent and fertilizer，Paecilomyces lilacinus and bacteria combined agent and fertilizer on tomato rhizosphere soil microorganisms ，Meloidogyne，tomato growth，quality，and yield were studied．The results showed that the number of bacteria in the fumigated soil was signifi cantly higher than that of CK，and the diff erence among fumigated treatments was not signifi cant．Meloidogyne were not found in the fumigation soil，while the number of Meloidogyne in CK was 2170 in 1 kg soil．The incidence rate of tomato plants in the treatments was signifi cantly lower than that in CK，but it was not signifi cant among the four treatments．Secondly，the plant heights of tomato in treatments M20 and T20 fumigated with dazomet at a dosage of 20 g · m-2 were higher than that in treatments M40 and T40 fumigated with dazomet at a dosage of 40 g · m-2．However，no signifi cant diff erence was observed on the stem diameter among the treatments，indicating that the combination of different dosages and microbial agents has a certain promoting effect on tomato growth and a positive effect on tomato yield．In summary，considering cost saving，efficiency improvement and environmental protection，it is indicated that the application of soil fumigantion with dazomet at the dosage of 20 g · m-2 combined with Trichoderma harzianum agent and fertilizer could control the tomato soil borne diseases eff ectively and improve the tomato yield and quality．

Key words: Keywords：dazomet, microbial agent, soil microorganisms, prevention eff ect, yield

摘要： 摘 要：为明确不同棉隆用量与微生物菌剂联合应用对番茄土传病害的防效，采用温室小区试验法，以常规施肥为对照（CK），研究 20 g · m-2 和 40 g · m-2 棉隆用量与自制哈茨木霉菌剂和菌肥、商品淡紫拟青霉复合菌剂和菌肥配施对番茄根际土壤微生物、根结线虫以及番茄长势、品质和产量的影响。结果表明，各处理土壤中细菌数量显著高于CK，且处理间差异不显著； 各处理土壤中根结线虫均未发生，而CK 根结线虫数量为2 170 条 · kg-1；各处理番茄植株发病率均显著低于CK，且处理间发病率差异不显著；各处理株高、茎粗、果实糖酸比、产量均显著高于CK，说明不同用量棉隆与微生物菌剂联合应用对番茄生长有一定促进作用，且对产量提高具有积极效应。在20 g · m-2 和40 g · m-2 棉隆用量下，土壤中微生物含量（放线菌除外）、番茄株高、茎粗、折合产量均无显著差异。综上，考虑节本增效和环境保护等方面，应用土壤熏蒸剂棉隆20 g ·m-2 联合施用哈茨木霉菌剂和菌肥技术，能够达到有效防控番茄土传病害和增产提质双重效果。

关键词: 关键词：棉隆, 微生物菌剂, 土壤微生物, 防效, 产量