Applied Biological Chemistry
- 제41권6호
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- Pages.457-464
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- 1998
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- 2468-0834(pISSN)
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- 2468-0842(eISSN)
지속적 농업을 위한 고성능토양의 개발 연구-II 유기질비료 시용에 따른 토양미생물상의 변화
Study on the Improvement of Soil for High Efficient and Sustainable Agriculture-II Changes of Population of Soil Microorganisms in the Fertilized Soil with Organic Materials
- Yoo, Sung-Joon (Department of Agricultural Biology, Chungnam National University) ;
- Chang, Ki-Woon (Department of Agricultural Chemistry, Chungman National University) ;
- Whang, Kyung-Sook (Department of Microbiology, Mokwon University)
- 발행 : 1998.10.31
초록
유기질 비료(돈분, 계분)의 시비량을 달리하여 토양에 첨가한 후 3년간 토양미생물상의 변화에 대하여 조사하였다. 통상농도의 NB(nutrient broth) 평판배지와 m배지를
For investigating the effect of amount of applied fertilizer with pig and chicken manures in the field, the number of soil bacteria were counted on the full strength conventional nutrient broth (NB) medium and its 100-fold dilution (DNB) medium. From the control soil samples without organic amendments, the number of bacteria on DNB medium was 5 to 10 times higher than that on NB medium. However, population density on NB medium was higher than on DNB medium from the treated soil with 60 and 120 Mg/㏊ for 3 years. Most of isolates from DNB plates did not grow on the NB plates. There were only grown on the 100-fold dilution medium, so it was called as DNB organisms. The DNB organisms were occupied as dominant group over 60% fo isolates in control soil. However, their occupation rates were rapidly decreased in the treatment soil with pig and chicken manures above 60 and 120 Mg per ha. These DNB organisms (oligotrophs) were significantly low population desities in the treatment soil with organic materials.
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