洋菇覆土蒸氣消毒對土壤微生物及病原菌影響之研究

Studies on the Effect of Steam Pasteurization of Casing Soil on Soil Microflora and Survival of Fungi Destructive to Mushroom

1.消毒過程中，微生物數目顯著減少，尤其放射菌較一般土壤為少。2.微生物中抗生物間之抗生作用以放射菌最大，放射菌細菌之抑制作用最為明顯，而對真菌較差。但細菌或真菌對放射菌缺乏抑制作用。3.覆土材料中之害蟲，經消毒後完全死滅。4.各種土壤病原菌經消毒後，除mucor外其餘均不生長。

1. The number of micro-organisms of casing soil was decree ing during the process of steaming sterilization, and that of actinomycetes was less than hat was found in natural soil before pasteurization 2. The actinomycetes which survived pasteurization had a stronger antibiosis to bacteria than to fungi. Neither fungi nor bacteria recovered during the steaming process exhibited signifiant antibiosis to actinomycetes. Therefore actinothycetes can be considered one of the nost important factor affecting the change of soil microflora following pasteurization. 3. Animal pests and fungi destructive to mushroom did not survive the process of casing soil pasteurization.