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Bacillus subtilis 接種이 土壤微生物相에 미치는 影響(2) : 셀루로즈 및 키틴 添加區에서의 微生物相의 變動
孔惠淑 건국대학교 1993 대학원 학술논문집 Vol.37 No.-
This study has been conducted to investigate the indigenous adaptability of Bacillus subtilis to soil added with cellulose and chitin, and antagonistic interaction between soil pathogenic Fusarium oxysporum and B.subtilis , as wel1 as the effects of B.subtilis on the periodic change of soi1 microflora in soi1 treated with the organic matters by culture in vitro. 1.The number of B.subtilis was increased with the application of organic matters, in particu1ar cellu1ose, furthermore it was more increased in the plot inocu1ated with B. subtilis than in the control plot. 2.The number of total bacteria was increased with the application of organic matters, in particular chitin, however it was not f1uctation with inoculation of B.subtilis. 3.The number of fungi was increased with the application organic matters, in particular chitin. 4.The number of actinomycetes was remarkab1y increased the app1ication of chitin, furthermore it was more increased with inoculation of B.subtilis. 5.The number of spore-forming bacteria(Bacillus sp.)was increased with application of organic matters, in particular chitin, furthermore it was increased with inoculation of B. subtilis. 6.The number of gram-negative bacteria was increased with the application of organic matters, in particular chitin, furthermore it was increased with inoculation of B.subtilis the late period of soil incubation. 7.The number of F.oxysporum was increased with the application of organic matters. in particular chitin, and it was decreased with the level of contrast plot with inoculation of B.subtilis by application of cellulose, meanwhile it was increased in chitin plot on the contrary.
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孔惠淑,柳恩珠,梁昌述 建國大學校 附設 農業資源開發硏究所 1993 農資源開發論集 Vol.18 No.-
토양으로부터 분리한 B. subtilis를 有機物이 施用된 토양에 還元 接種하여 有機物 種類에 따른 B. subtilis의 토양중에서 適應·定着性 및 B.subtilis가 다른 土壤微生物相에 미치는 영향을 經時的으로 조사하였다. 또한 有機物이 시용된 토양중에서 B,subtilis와 植物 病原菌인 F. oxysporum을 동시에 接種하여 상호간의 拮抗的 關係를 검토한 결과는 다음과 같다. 1) B. subtilis菌數는 對照區에서보다 B. subtilis 接種區에서 增加를 보였고 단지 볏짚 및 크로버만을 사용한 區에서보다 볏짚 및 크로버 施用區에 B. subtilis를 접종한 區가 약 2배 정도 B. subtilis菌數의 증가를 보였다. 특히 B.subtilis를 有機物 施用區에 접종했을 때 볏짚 시용구가 크로버 시용구에서보다 B. subtilis菌數가 약 3배 정도 현저하게 증가하였다. 2) 細菌과 絲狀菌數는 대조구보다 B.subtilis 接種區에서 각각 23% 및 20%씩 감소하였으므로 또한 크로버 시용구에서보다 크로버+B. subtilis 접종구에서도 각각 33% 및 16%씩 감소하였고, 볏짚 시용구에서는 볏짚+B. subtilis 접종구에서 각각 29% 및 32%씩 감소경향을 나타내었다. 3) 胞子形成菌數는 대조구보다 B. subtilis 접종구에서 약 10배 정도 증가하였으며 단지 有機物만을 시용한 區보다도 크로버+B. subtilis 접종구와 +B. subtilis 접종구에서 각각 2배, 4배 정도의 증가경향을 보였다. 또한 gram(-)細菌도 胞子形成菌數와 비슷한 경향을 나타내었고, B. subtilis接種이 그람 음성 세균수의 변동에는 영향을 미치지 않았다. 4) F. oxysporum의 菌數는 크로버 시용구에서보다 크로버+F. oxysporum 접종구에서 25배 정도 증가하였으나 크로버+B. subtilis 접종구에서는 크로버+F. oxysporum 접종구보다 약 5배 정도의 감소경향을 나타내었다. 또한 F. oxysporum菌數는 볏짚+F. oxysporum區에서 볏짚 單獨施用區보다 3배 정도 증가하였으나 볏짚+B. subtilis+F. oxysporum접종구는 볏짚+F. oxysporum접종구보다 F. oxysporum의 數가 약 17배 정도 감소경향을 나타내었다. 더욱이 F. oxysporum菌數는 크로버+B. subtilis+F. oxysporum접종구보다 볏짚+B. subtilis+F. oxysporum접종구에서 약 40배 정도의 감소경향을 나타내었다. 5) 크로버 시용구의 토양 pH는 약 ph 9에 이르러 토양 ph가 alkali화되었으며 볏짚시용구의 토양 ph는 큰 변화 없이 약산성을 유지하였다. This study has been conducted to investigate the adaptation of Bacillus subtilis to the soil and the antagonistic interaction between B. subtilis and pathogen Fusarium oxysporum as well as the periodic change of soil microflora when B. subtilis was inoculated to the soil treated with organic matters. Some results obtained from this study are as follows : 1) The number of B. subtilis was more increased about 6 times in the plot inoculated with B.subtilis than in control plot. It was relatively double in the organic matter+ B. subtilis plot than in the only organic matter plot. B. subtilis was particuraly increased about 3 times in the straw +B. subtilis plot, compared with the clover +B. subtilis plot. 2) The number of total bacteria and fungi was decreased by 23% and 20% in the plot inoculated with B.subtilis respectively than in control plot. It was not only decreased by 33% and 16% in the clover+B. subtilis plot respectively than in the only clover plot but it was also decreased by 29% and 32% in the straw+B. subtilis plot respectively than in the only straw plot. 3) The number of spore-forming bacteria was increased about 10 times in the plot inoculated with B.subtilis than in the control plot. It was also increased 2 times and 4 times in the clover+B.subtilis plot and in the straw+B. subtilis plot respectively than in each organic matter plot. The number of gram-negative bacteria and the spore-forming bacteria were slightly increased in all the plot inoculated with B. subtilis. 4) The number of F. oxysporum was increased about 25 times in the clover+ F. oxysporum plot than in the only clover plot. But it was decreased about 5 times in the clover+B.subtilis+ F. oxysporum plot than in the clover +F. oxysporum plot. Furthermore, F. oxysporum was remarkably decreased about 40times in the straw+B. subtilis+ F. oxysporum plot than in the clover+b. subtilis+ F. oxysporum plot. It occured that B. subtilis had inhibited the growth of pathogen F. oxysporum when B. subtilis was inoculation to the soil treated with straw. 5) Soil pH was changed to pH 9 in the plot treated with clover to become the alkalification of experimental soil. Meanwhile it was not changed in the plot treated with straw.
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