• 제목/요약/키워드: desirable number of beef cattle

검색결과 3건 처리시간 0.024초

한우 가격 파동의 인과순환적 구조분석과 정책 시뮬레이션 (Causal Loop Analysis and Policy Simulation on the fluctuation of Korean Cattle Price)

  • 최남희
    • 한국시스템다이내믹스연구
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    • 제14권3호
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    • pp.135-163
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    • 2013
  • This study aims to analyze the feedback loops and policy simulation of price fluctuation of Korean Cattle. The Korean Cattle market shows the 'Cycle of Beef' since 1970. In general, the market for agricultural commodities exhibit repeated cycles of prices and production. Why Beef products market in Korea shows the fluctuation of cattle and beef price repeatedly for forty years? To find an answer, this paper explores the feedback structure of the dynamics of the beef market by the systems thinking and build a stock-flow diagram model for the simulation of future behavior of the market sector of the Cattle. The dynamic simulation model was developed to identify and analyze the cyclical behavior among many variables, which is the number of cattle (calves, cow, etc.), the price of cattle, the demand for beef, the desirable number of cattle, slaughter, etc. The results of this study demonstrate that dominant feedback loops between the number of cattle and livestock prices. The demand for Beef and slaughter with time delay, also the results of the simulation to explain the persistence of future price fluctuations and actions meat market until 2025.

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냉수침지 숙성법이 진공포장 한우육의 연도 및 미생물 증식에 미치는 효과 (Effects of Submersion Aging in Chilled Water on Tenderness and Microbial Growth of Vacuum-Packed Hanwoo Meat)

  • 주선태;이한기;강근호;신철우;양한술;문성실;이정일;김영환;박구부
    • 한국축산식품학회지
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    • 제22권3호
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    • pp.228-233
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    • 2002
  • 본 연구는 진공포장 한우육의 냉수침지 숙성방법이 한우육의 연도 및 미생물증식에 미치는 영향을 구명하고자 수행하였다. 저장기간이 경과함에 따라 근절길이는 냉수침지 처리구가 저장 3일째 유의적(p<0.05)으로 긴 것으로 나타났으며, 저 장 3일째를 제외 한 저 장기간 동안 유의적 인 차이는 없었으나 대조구에 비해 긴 경향을 보였다. 또한 유리칼슘 농도에 있어서도 저장 7일 째 냉수침지 처리구가 유의적(p<0.05)으로 높게 나타났으며, 역시 저장 7일째를 제외한 저장기간 동안 유의적인 차이는 없었으나 대조구에 비해 높은 경향을 보였다. 한편 전단가와 근원섬유 소편화 지수에 있어서는 저장기간이 경과함에 따라 두 처리구간에 있어서 유의적인 차이는 나타나지 않았지만, 냉수침지 처리구가 상대적으로 낮은 전단가와 높은 소편화지수의 경향을 보였다. 이 같은 결과는 냉수침지 숙성이 일반공기순환냉장고의 숙성보다 근절의 길이를 길게 하고, 근형질내 칼슘의 농도를 높이며, 소편화 지수를 높게 한 결과 연도를 향상시킬 수 있다는 가능성을 제시한 것으로 사료된다. 덧붙여, 총세균수는 일반공 기순환냉장실에 저장한 것에 비해 냉수침지 처리구가 유의적(p<0.05)으로 낮은 것으로 나타나, 온도의 변이를 줄이는 것에 기인하여 미생물의 성장억제에도 효과적일 것으로 사료된다.

가축분뇨의 자원화 용량 평가에 관한 연구 (A Study on Recycling Capacity Assessment of Livestock Manure)

  • 안태웅;최이송;오종민
    • 환경영향평가
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    • 제17권5호
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    • pp.311-320
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    • 2008
  • Reusing livestock manure have various advantages in securing soil organic resources, and since the costs needed for converting them into liquefied fertilizers are relatively moderate compared to normal treatment, such methods are necessary. In this study, the Recycling Capacity Assessment of Gyeonggi-do was carried out by comparing between the fertilizer demands for specific crops based on the cultivation areas and the amount of fertilizer resources that are generated from livestock manure. From this assessment, the possibility of obtaining resources by converting livestock manure into fertilizers were evaluated. The amount generated of Livestock Manure in Gyeonggi-do were evaluated by applying the emission units to the number of livestock manure. And from the amount generated of Livestock Manure, the amount of fertilizer produced from Livestock Manure were calculated by using the fertilizer a component rate. When considering the amount of fertilizer produced from Livestock Manure based on the type of livestock, N 6,626 ton/year, $P_2O_5$ 1,824 ton/year, $K_2O$ 4,480 ton/year were produced from milk cow manure, while N 5,247 ton/year, $P_2O_5$ 2,772 ton/year, $K_2O$ 2,879 ton/year, were produced from beef cattle manure. N 14,924 ton/year, $P_2O_5$ 7,205 ton/year, $K_2O$ 6,750 ton/year were produced from pigs and N 12,651 ton/year, $P_2O_5$ 4,458 ton/year, $K_2O$ 5,542 ton/year were produced by chickens. So the total amount of fertilizers that can be obtained from livestock manure were 3,668 ton/year Nitrogen, 16,259 ton/year phosphate and 19,651 ton/year kalium. And the total fertilizer demands in Gyeonggi-do were Nitrogen 27,200 ton/year, Phosphate 8,853 ton/year, and kalium 13,211 ton/year respectively. Nitrogen which had higher demands than production quantities were considered as limitation factors in crop growth. So the Recycling Capacity Assessment was carried out mainly based on Nitrogen. Since the Nitrogen quantities that can be provided by recycling livestock manure were 3,532 ton/year lesser than the Nitrogen demands, it is estimated that it would be desirable to convert livestock manure into resources. But in order to properly convert the entire livestock manure into organic resources, the seasonal situation that effects the nitrogen demands of crops along with the regional effects due to the industrial structures should be seriously analyzed. In addition, a system that can effectively produce and manage fertilizer should be established.