Changes of Soil Respiration after Partial Sterilization by Autoclaving or Addition of Agrochemicals

概要

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Changes of the soil respiration after partial sterilization by autoclaving or addition of chemicals were analyzed under laboratory conditions at 25℃. Partial sterilization was simulated by mixing autoclaved and fresh soil. When the weight ratio of autoclaves soil to total soil was about 10 to 30%, The rate of soil respiration was relatively constant and the curves were similar to that of the fresh soil itself. After the application of a fumigant, chloropicrin and in the above simulation at the ratios above 50%, soil respiration was suppressed temporarily and then stimulated after 0.3-3 days. The higher the concentration of the chemicals, or the higher the ratio of autoclaves soil, the longer the time lag before a steep rise of soil respiration was observed. When fresh soil was inoculated to the autoclaved soil, the smaller the size of inoculum, the longer the time lag before a steep rise of soil respiration was observed.
社団法人日本土壌肥料学会の論文