Chloropicrin (Pic) and dazomet (DZ) are effective soil fumigants that are often used to reduce soil-borne pathogens that would otherwise reduce crop yield. As Pic is scheduled to be banned, we investigated whether its consumption could be halved by alternating it with DZ. We observed that Pic alternated with DZ increased the soil NH₄⁺-N content by 28.74–47.07 times, increased available potassium content by 40.80%−46.81% and increased electrical conductivity by 39.23%−85.81%. It generally improved the soil’s physicochemical properties. High-throughput DNA sequencing showed that Pic alternated with DZ changed the taxonomic diversity of bacteria and fungi by increasing the relative abundance of Bacillus and Firmicutes, and by decreasing Proteobacteria, Acidobacteria and Sphingomonas. Moreover, Pic alternated with DZ can inhibit key soil pathogens by more than 90% and significantly increased strawberry yield by 78.22%−116.12%. In terms of strawberry production, we recommend using DZ in the first year and Pic in the second year. Our results showed significant ecological benefit and yield benefit when Pic consumption was halved by alternating it with DZ.

氯化苦 (Pic) 和达唑美 (DZ) 是有效的土壤熏蒸剂，通常用于减少土壤传播的病原体，否则会降低作物产量。由于 Pic 计划被禁止，我们调查了是否可以通过与 DZ 交替来减少其消耗量。我们观察到Pic与DZ交替使土壤NH ₄ ⁺ -N含量增加28.74-47.07倍，有效钾含量增加40.80%-46.81%，电导率增加39.23%-85.81%。它普遍改善了土壤的理化性质。高通量 DNA 测序表明，Pic 与 DZ 交替改变了细菌和真菌的分类多样性，通过增加芽孢杆菌和厚壁菌的相对丰度，并通过减少变形杆菌、酸杆菌和鞘氨醇单胞菌。此外，Pic与DZ交替可抑制土壤关键病原体90%以上，显着提高草莓产量78.22%-116.12%。草莓产量方面，我们推荐第一年用DZ，第二年用Pic。我们的结果表明，当 Pic 消耗与 DZ 交替而减半时，显着的生态效益和产量效益。