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논문 기본 정보

자료유형
학술대회자료
저자정보
이상은 (국립한경대학교) 윤영만 (국립한경대학교)
저널정보
한국토양비료학회 한국토양비료학회 학술발표회 초록집 2008년도 추계학술발표회 논문집
발행연도
2008.9
수록면
100 - 115 (16page)

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초록· 키워드

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The nearly 75% of animal feed materials used for livestock production are imported every year in Korea. Most of imported feed ingredients are concentrated feeds such as com, wheat, soybean, soybean meal, etc. and they are used as the source materials for the production of assorted feed. The imported concentrated feeds are high in nitrogen and phosphorus. Therefore, the consistent import of feed ingredients may cause an increase of nutrient deposit in our agricultural ecosystem. In the current review, it was discussed with the situation of the feed importation and its nutritional composition to evaluate the nutrient load by the imported feeds onto agricultural ecosystem. The nutrient load caused by imported feeds in agricultural environment was compared with the nutrient demand for crop production. The amounts of N, P<SUB>2</SUB>O<SUB>5</SUB> and K<SUB>2</SUB>O introduced by the imported fteds in Korea were 371, 140 and 143 Ktons. And, the N, P<SUB>2</SUB>O<SUB>5</SUB> and K<SUB>2</SUB>O loads excreted from imported feeds in livestock were 148, 84 and 86 Ktons of N, P<SUB>2</SUB>O<SUB>5</SUB> and K<SUB>2</SUB>O and These nutrient loads by the imported feeds are at the percentage of N 52%, P<SUB>2</SUB>O<SUB>5</SUB> 52% and K<SUB>2</SUB>O 42% in the comparison of total nutrient amounts excreted from livestock animals in Korea. The 82.3% of nutrients excreted from livestock was recycled to crop land as compost and liquid fertilizer, and the others were discharged to river after water treatment processing or disposed to ocean. Also, passing through the recycling process far the production of compost and liquid fertilizer, the amount of nutrients was reduced by the ammonia vaporization of livestock feces and urine. Accordingly, N 81, P<SUB>2</SUB>O<SUB>5</SUB> 74 and K<SUB>2</SUB>O 76 Ktons in the nutrients excreted from livestock were estimated to be utilized in the crop land. Consequently, it was estimated that 44, 48 and 69 Ktons of N, $P_2O_5\;and\;K_2O$ were taken up with crops in the consideration of the ratio of mineralization, and the amounts of leached or deposited N, P<SUB>2</SUB>O<SUB>5</SUB> and K<SUB>2</SUB>O in crop land were estimated to be 37, 27 and 7 Ktons, respectively. It is estimated that 12%, 34% and 48% of N,P<SUB>2</SUB>O<SUB>5</SUB> and K<SUB>2</SUB>O introduced by the imported feeds were used by crops, and 10%, 34% and 5% of N, P<SUB>2</SUB>O<SUB>5</SUB> and K<SUB>2</SUB>O were leached or deposited in agricultural ecosystem. Therefore, considering the leached and deposited amounts of N, P<SUB>2</SUB>O<SUB>5</SUB> and K<SUB>2</SUB>O originated from the imported feed ingredients, the consistent import of feeds may gradually increase the nutrient load onto agricultural ecosystem.

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UCI(KEPA) : I410-ECN-0101-2014-521-000648181