[자원과학]혼합 비료 유기질비료의 발효과정 중 이화학성 및 미생물밀도 변화

소개글

우리나라에서는 1990년대 초부터 친환경 농업이 정책대상으로 논의되었고 1997년 환경농업육성법이 제정되었다. 2001년부터 친환경농업육성 5개년 계획을 통해 2005년까지 화학비료와 농약을 사용량기준으로 30%까지 절감하는 것을 목표로 하고 있다. 2002년 현재 친환경농산물 생간량이 20,534천톤으로 전체농산물 생산량의 3%를 차지하고 있으며, 이중 유기농산물 생산량 11.7%, 전환기유기농산물 생산량 1.2%, 무농약농산물 생산량 25.9%, 저농약농산물 생산량 61.1%로 저농약농산물이 대부분을 차지하고 있다 (Kim, 2003)
따라서 유기농산물 생산량의 증가를 위해 화학비료를 대체하면서 적정 생산량을 올릴 수 있는 유기질 자재의 농업적 활용이 중요한 대안으로 인식되고 있다.

목차

1. 요약(Abstract)
2. 서언
3. 재료 및 방법
4. 결과및 고찰
5. 적요
6. 인용문헌

본문내용

1. 요 약(Abstract)

This study was conducted to investigate the changes in physicochemical and microbiological properties during fermenting process of organic fertilizer which was made from the mixture of organic materials such as sesame oil cake, fish meal, blood meal, rice bran, ground bone meal, and natural minerals such as illite, crusted oyster shell and loess. They were mixed and fermented for 70 days. The sesame oil cake and rice bran, major ingredients for organic fertilizers, consisted of 7.6 and 2.6% total nitrogen, 3.6 and 4.6% P2O5, 1.4 and 2.2% K2O, respectively. The ground bone meal included 29.2% P2O5and illite included 3.8% K2O. Temperature of organic fertilizer during the fermentation rapidly increased over 50℃ within 2 days after mixing and stabilized similar to outdoor temperature after 40 days. Moisture content decreased from 36.3 to 16.0% after 1 month. C/N ratio of organic fertilizer slightly increased until 30 days thereafter, it slowly decreased. It resulted from the faster decrease of total nitrogen concentration compared with organic matter.

참고 자료

Bagstam, G 1979 Population changes in microorganisms during composting of spruce-back Ⅱ. Mesophilic and thermophilic microorganisms during controlled composting. J. Appl. Micobiol. Biotechnol.6:279-288.
Baker, M., B. Knoop, S. Quiring, A Beard, B. Lesikar, J. Sweeten, and R. Burns. 2003. composting guide index. Prepared by the Texas Agricultural Extension Service Solid and Hazardous Waste Management Initiative Team. Chap. I. The Decomposition process. http://aggie-horticulture. tamu.
edu/extention/compost/compost.html.
Cardenas, R. R., and L. K. Wang. 1989. Evaluation of city refuse compost maturity: A review. Biol. Wastes 27:115-14.
Champagne, E.T., R. M. Fao, J. A Liuzzo, J. W. Robinson, R. J. Gale, and F. Miller. 1985. Solubility behaviors of the minerals, proteins and phytic acid in rice bran with time, temperature and pH. Cereal Chem. 62:218-222.
Chino, M., S. Kanazawa, T. Mori, M. Araragi, and B. Kanke. 1983. Biochemical studies on composting of municipal sewage sludge mixed with sice hull. Soil Sci. Plant Nutr. 29:159-173.