Problem to be solved: to provide a reduction and disinfection method and reduction disinfection material of a soil which is easy to apply to the soil and can obtain stable effect.At least one type of anaerobic anaerobic microorganisms or aerobic microorganisms selected from the group consisting of Streptomyces, bacillus, and pikia are administered to the soil and irrigated in the soil to form the soil table The surface is reduced by coating with a sheet-like covering material made of synthetic resin.Diagram【課題】土壌への適用が簡単であって、安定した効果が得られる土壌の還元消毒方法及び還元消毒資材を提供する。【解決手段】ストレプトマイセス（Streptomyces）属、バチルス（Bacillus）属、及びピキア（Pichia）属から成る群から選ばれる少なくとも１種類の通性嫌気性微生物又は好気性微生物を主成分とする還元消毒資材を土壌に投与し、前記土壌に潅水し、前記土壌の表面を合成樹脂から成るシート状の被覆材で被覆することによって該土壌を還元消毒する。【選択図】図１
