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      • 축산에서 기후변동 관련 기체의 발생원과 방지대책

        류종원 한국축산시설환경학회 1998 축산시설환경학회지 Vol.4 No.1

        There are a lot of trace gas of gaseous pollutants produced from farm animals. CO2 and CH4 are gases produced directly by the animal. NH3, N2O are produced from animal waste. Most of the effects of these gaseous pollutants on the farm animals have not been investigated in detail. CO2 emission from animal is very little. CH4 release from ruminant is also considered to be a significant factor in potential global warming. Nitrous oxide (N2O) emissions could be avoided by using organic or mineral fertilizer only as much as is needed by plant growing. This paper gives an overview about problems and solving strategies for possibilities for reduction of gaseous pollutants. The way to reduce the gaseous pollution risks from livestock systems are discussed.

      • 가축분뇨가 토양에 미치는 영향 및 자연순화농업의 연구방향

        박기도,박창영 한국축산시설환경학회 2007 축산시설환경학회지 Vol.13 No.1

        흙은 작물생산을 위해 토양 중에 공급된 양분을 물리․화학․생물학적인 기작을 통해 이용한다. 작물생산성이 좋고 건전하며 질이 좋은 토양은 작물이 바로 흡수이용 할 수 있는 수용성 양분, 치환하여 이용하는 치환성 양분, 또 다소 오랜 시간이 걸려 무기화 할 수 있는 유기성 양분 등을 적절하게 잘 나누어 가지고 있는 토양이다. 농업을 지속적으로 유지하기 위해서는 농업의 근간이 되는 토양이 건정해야 함은 당연하다. 자연순환농업에서 가축분뇨가 분명 우수한 양분자원이지만 토양분석에 의해 필요한 양 만큼만 시용되지 않고 무분별하게 과다한 양이 농경지에 사용된다면 토양의 건정성 및 질은 악화될 것이다. 이상에서 열거된 가축분뇨를 활용한 자연순환농업을 올바르게 정착시키고 농업환경을 보전하면서 가축분뇨의 자원화 문제를 친환경적으로 정착하기에는 여러 가지 어려움이 많을 것이다. 양분총량제 도입, 축산의 지역과밀 해소방안, 축산과 경종의 유기적인 체계구축 등 올바르고 현실성 있는 정책의 실현과 다양한 가축분뇨 자원화 기술개발 및 환경에 미치는 영향에 관한 종합적 연구를 바탕으로 가축분뇨 자연순환농업이 수행되어져야 한다.

      • 한국 국토의 질소부하화 질소오염 방지대책

        류종원 한국축산시설환경학회 1997 축산시설환경학회지 Vol.3 No.2

        This paper was discussed N-balance of the republic of Korea. About 397Kg N/ha was inputted into the chemical fertilizer, animal feed, precipitation and nitrogen fixation. About 15kg N/ha was outputted from the Korea. The amount of N surplus was 397kg N/ha and loaded into environment. This causes the problem of water, air and soil pollution. It should take measures to improve the situation, such as depending more on selfsufficient feed and using nutrient cycling functions of soils.

      • 고온환경에 있어서 면양의 제일위내 VFA 조성비율이 일반임상소견 및 Insulin 분필반응에 미치는 영향 - VFA-TG 인공영양사육법의 응용 -

        홍경선,정태영,좌야굉명,지하농랑,중와방야,안보계일 한국축산시설환경학회 1997 축산시설환경학회지 Vol.3 No.1

        This study was conducted to investigate the combined effects of VFA composition of rumen fluid and heat exposure (30${\pm}$2$^{\circ}C$) on the general clinical view and insulin secretory response to glucose in sheep. The total infusion of nutrients was examined in sheep via the technique of continuous alimentation. Four adult Suffolk sheep fitted with a permanent ruminal cannula and a simple T-shaped duodenal cannula were used. A peristaltic pump was used to infuse the solutions of volatile fatty acid triglycerides (VFA-TG) consisting of 70 triacetin : 20 tripropionin : 10 tributyrin (low propionin division: LP) and 50 triacetin : 40 tripropionin : 10 tributyrin (high propionin division: HP) on the basis of energy and minerals into the rumen, and casein solution into the duodenum. The effects of heat exposure and type of the levels of VFA-TG solutions on the insulin secretory response to glucose in sheep were investigated by using hyperglycemic clamp (HGC) technique. The results obtained are summarized as follows: 1. During the heat exposure (latter half of the infusion period), respiration rate, heart rate and rectal temperature increased (P<0.01, P<0.01, P<0.05), but the levels of VFA-TG solutions (LP and HP division) did not affect the general clinical view except for the heart rate. 2. In the HGC technique, glucose infusion rate (GIR) and mean plasma insulin increments (MPII) tended to be ower in the heat exposure than in the thermoneutral environment, but no significant difference was found among the treatments. GIR and MPII remained unchanged between the levels of VFA-TG solutions. 3. In the HGC technique, ratio of MPII to GIR (MPII/GIR) which represents pancreatic ${\beta}$-cell response to glucose stimulation remained unchanged among the treatments.

      • 착유시설 형태에 따른 착유 노동생산성에 관한 연구

        정태영,김형화,김동일,이정호,이홍표,김종민,이연섭 한국축산시설환경학회 1997 축산시설환경학회지 Vol.3 No.2

        This study was peformed to compare work routine time and performance of milking systems by measuring motion and time in milking procedure. Data were collected from thirteen dairy farms among which milking was done by bucket in two farms, by pipelines in three, by tandem parlors in four including one remodeled side-opening, by herringborn parlors in three and by a parallel milking parlor. Recording time and motion for milking parlor. Recording time and motion for milking procedure was performed by stopwatch and notebook computer. Work routine elements were recorded and calculated into cows milked per-man-hour(CMPH). The results are as follows : Average milking time per cow(MTPC) in bucket and pipeline milking systems usually installed in cow stall were 442.7 and 395.8 seconds, respectively. And average CMPH of bucket and pipeline milking system were 144.5, 303.3, 272.5 and 380.3 seconds, respectively. And CMPH of tandem, herringbone, parallel and modified side-opening systems were 24.9, 11.9, 13.2 and 9.5 heads, respectively. CMPH was the highest in the tandem milking system and the lowest in the bucket milking facilities. CMPH, when milked in a parlor resulted in high value compared with bucket or pipeline milking systems installed in cow stable. They showed considerably low CMPH compared with the results of other countries. The reason why so low CMPH could be derived from type and mechanization of facilities and equipment, operator's ability, number of operator, idle time and milking procedure.

      • 무창분만돈사의 온.습도 환경 분석

        이성현,조한근,장유섭 한국축산시설환경학회 1997 축산시설환경학회지 Vol.3 No.2

        Recently, local swine producers are rapidly adopting the indoor production system which developed in foreign countries. However, this imported system is reported as not functioning properly because of different climate conditions. The objective of this project was to investigate the environment characteristics of a windowless delivery swine building. The parameters studied were the heating and cooling loads, the daily changes of indoor temperature and relative humidity, the horizontal and the vertical distributions of indoor temperature, and the effect of mist cooling on indoor temperature. From this study, the following are founded : 1. The maximum cooling and heating loads were - 317.0kcal/㎡$.$h and 336.5kal/㎡$.$h in summer and in winter. The large loads seems to be on account of inappropriate operations of ventilating fans. 2. The daily variations of relative humidity in indoor were smaller than those in outside. Those values both in summer and in winter as relative humidities in door was lower than optimum for growing pigs, the additional humidifier might be helpful to increase the relative humidity in indoor. 3. The horizontal distribution of the indoor temperature was found to be uniform in the variation range of 1$^{\circ}C$. 4. The vertical distribution of the indoor temperature was not found to be uniform; the temperature of upper part was higher than that of slot part. 5. Average values of indoor temperature became lower by 3$^{\circ}C$ by mist cooling. But the variation of temperature was found to be larger; The middle part of the room was cooled down, but the corner part of the room was not affected by misting due to uneven nozzle configuration.

      • 육계의 계사 형태와 시설수준이 사육환경과 생산성에 미치는 영향

        최희철,서옥석,이덕수,한정대,강보석,이상진,김상호 한국축산시설환경학회 1999 축산시설환경학회지 Vol.5 No.2

        Three types of commercial broiler farms were surveyed to evaluate the effects of housing and production systems on environment and performances in broiler production. Environment condition of broiler house was better in windowless type than vinyl house. Ammonia, carbon dioxide and dust in vinyl house was 28ppm, 2,000ppm, 50.5CPM, respectively. Mortality was higher in vinyl house than that of widowless broiler house. Body weights at the age of 39 days were 1,551g, 1,607g and 1,620g of vinly house, open-sided broiler house and windowless broiler house, respectively. The incidence of abnormal carcass from the vinyl house was higher than those of the others.

      • 우리나라 중부지방 돈사의 구조 및 환경실태조사

        최홍림,송준익,김현태 한국축산시설환경학회 1999 축산시설환경학회지 Vol.5 No.1

        The structural and environmental characteristics of typical pig houses in different growth phases were surveyed and analyzed. Based on the data for thirty six selected farms in four provinces, Gyonggi-do, Gangwon-do, Choongnam, and Chonbook, in Central Korea, the goal is to eventually establish standard pig houses of sow and litter, nursery pigs, and growing-finishing pigs. The survey included farm scale, production specialization, structural dimensions of the houses and their ventilation systems, cooling and heating systems, and floor and pit systems related to manure collection. The survey showed 90∼99% of growing-finishing curtain installation rate was lower by 10∼20%. The sidewall curtain system, although popular, is not well insulated which leads to excessive heating costs in winter. Regarding flooring and manure collection system of the house, there was quite a lot variability among provinces, with 30∼80% of the houses installing scraper systems with concrete-slat floors in comparison with 30∼60% using a slurry system. Gangwon-do and Choongbook Chungwoo-goon are the predominant regions that installed a scraper system. A general trend toward enlargement and enclosure of pig houses for all growth phases was gaining popularity in most regions in recent years. A steady shift to three site production from a lumped system was also observed to prevent a disease transfer. The structural design of a standard pig house with its environmental control systems including ventilation and heating/cooling system was suggested for further validation study. In-depth analysis of the survey data is presented in the Results and Discussing section.

      • 육계 건물 및 시설에 대한 투자 분석

        김정주 한국축산시설환경학회 1997 축산시설환경학회지 Vol.3 No.1

        Most of Korean broiler farms are constructed with vinyl houses. Such types of broiler farms might be cheaper in terms of cost, but poor in terms of environment condition. According to enlargement of broiler farm size, high value production systems or automatic facilities are introduced in this field. However, investment may not always guarantee the profit of the management. Therefore, it is necessary to undertake the investment analysis before decision making for the investment. Under the assumption that 870 Pyoung(≒$3.3㎡) of a broiler farm within 1,740 Pyoung(≒3.3㎡) of land is built with the producing capacity of 50,000 heads of chicken in a time. The total investment is calculated to be 600 million won(1,000 won≒$1.1), and out of them 58.1% is provided by the owner, 31.6% from the government loan, 5.8% from government subsidy, and 5.3% from other agencies or banks. The expected profit of the broiler farm is 64.6 million won(1,000 won≒$1.1) per year. The IRR calculated is 0.0808 which means that the rate to profit of this project would be 8.1%. This also means that for this investment the interest rate of the capital provided should be less than 8.1% per year. Considering that the current opportunity cost of the own capital is 8.5% this project is not so attractive for those who is going to build broiler farms mainly with their own capital. In other words this project would not be profitable, unless the average interest rate of the loans provided for this project is less than 8.1% per year.

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