Comparative Studies on the Decomposition of Rice Straw and Straw Compost by Plant Pathogens and Microbial Saprophytes in Soil : I. Similarity in Respiration between the Pathogens and the Saprophytes

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Respiration was compared between Pseudomonas caryophylli and P. putida, between Streptomyces scabies and S. sp., and between Rhizoctonia solani and Trichoderma viride when they decomposed rice straw and straw compost in soil. On the whole, the maximum rates of respiration and the cumulative CO_2 evolution during the 0-60 d period of incubation were similar between the two bacteria, between the two actinomycetes, and between the two fungi when they decomposed rice straw in soil. It is concluded that rice straw is able to provide energy and nutrients for both pathogens and saprophytes. When the six microorganism decomposed straw compost in soil, the maximum rates of respiration and the cumulative CO_2 evolution during the 0-60 d period of incubation were low in comparison with the straw decomposition, and hence similar between the pathogens and the saprophytes. It is assumed that a well-matured straw compost is safer than straw in relation to soilborne diseases.
一般社団法人日本土壌肥料学会の論文