Properties and Metabolic Diversity of Microbial Communities in Soils Treated with Steam Sterilization Compared with Methyl Bromide and Chloropicrin Fumigations (Soil Biology)
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概要
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The effects of steam sterilization (SS) on soil microbial properties including metabolic diversity of the microbial communities were examined in a greenhouse compared with those of two fumigants, methyl bromide (MB) and chloropicrin (CP). The numbers of fungi decreased in all the treatments. Nitrifiers, both ammonium-oxidizing bacteria and nitrite-oxidizing bacteria, were severely affected by the SS and CP treatments, resulting in their virtual disappearance. The decrease in the levels of microbial biomass C and N after the treatments suggested that the SS and CP treatments eradicated the microorganisms more effectively than the MB treatment and that the influence of the former persisted until the end of the experiment, 4 months after the treatments. Accumulation of NH_4-N was observed after the SS and CP treatments mainly due to the partial decomposition of the dead microorganisms and the marked decrease in the number of ammonium-oxidizing bacteria. The richness and average well color development (AWCD) values in the microbial communities after the SS treatment were evaluated by the carbon substrate utilization method using Biolog ECO MicroPlates. The values decreased markedly immediately after the treatment but showed a rapid recovery, while those after the CP treatment continued to decrease until the transplanting of tomato seedlings. The effect of the MB treatment on the soil microbial communities was less pronounced. The growth of the tomato plants was promoted by the SS and CP treatments due to the increase in the N supply at the initial stage of tomato growth.
- 社団法人日本土壌肥料学会の論文
著者
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SAKURAI Katsutoshi
Faculty of Agriculture, Kochi University
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IWASAKI Kozo
Faculty of Agriculture, Kochi University
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Tanaka Sota
Kochi Univ. Kochi Jpn
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Tanaka S
Graduate School Of Kuroshio Science Kochi University
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Tanaka S
Faculty Of Agriculture Kochi University
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Tanaka Sota
Faculty of Agriculture, Kochi University
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Maeda K
Faculty Of Pharmaceutical Sciences Osaka University
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MAEDA KAZUHIRO
Faculty of Pharmaceutical Sciences, Osaka University
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Sakurai K
Sophia Univ. Tokyo Jpn
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Sakurai K
Faculty Of Agriculture Kochi University
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Sakurai Katsutoshi
Faculty Of Agriculture Kochi University
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Tanaka Sota
Faculty Of Agriculture Kochi University
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Maeda K
Faculty Of Agriculture Kochi University
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Kobayashi Takayoshi
Faculty of Agriculture, Kochi University
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Yamane Shinzo
Faculty of Agriculture, Kochi University
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Iwasaki Kozo
Faculty Of Agriculture Kochi University
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Iwasaki Kozo
Department Of Bioresources Sciences Faculty Of Agriculture Kochi University
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Sakurai K
Department Of Biophysics Graduate School Of Science Kyoto University:core Reserch For Evolutional Sc
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Kobayashi Takayoshi
Faculty Of Agriculture Kochi University
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Yamane Shinzo
Faculty Of Agriculture Kochi University
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Iwasaki K
Faculty Of Agriculture Kochi University
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Iwasaki Kozo
Kochi Univ. Kochi Jpn
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Maeda Kazuhiro
Faculty of Agriculture, Kochi University
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