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진신흠,고문석,이종언,이현종,김은주 한국동물자원과학회 2002 한국축산학회지 Vol.44 No.1
본 시험은 제주도내 92개 낙농가중 3지역 8개 낙농가 착유우 262두에서 생산되는 우유의 품질을 분석하고, 고품질 우유생산에 저해 요인이 되는 유방염 원인균을 분석 처방하여 체세포 수가 낮은 신선한 고품질의 우유를 생산코자 시험을 수행하였다. 6∼10월 중 일일 1두당 평균 산유량은 22.4㎏, 평균 유지율은 3.69%였다. 우유내 평균 세균수는 15천/㎖로 대체로 양호 하였으며, 체세포 수는 농가 평균 254.6천/㎖ 였고, 착유우 742분방에 대한 6∼10월간 체세포수의 분포 비율은 우유 ㎖당 20만 이하 68.8%, 20∼50만 18.8%, 50만 이상 12.4%였다. 유방염 원인균별 발생분포는 포도구균성이 47분방으로 가장 많았으며, 연쇄상 구균성 17분방, 바실러스성 12분방 등으로 분석되었다. 산유량, 유지율, 세균 수, 체세포 수를 적용한 농가별 월간 조수입은 두당 평균 407천원이였으며, E와 A 농가에서는 456∼445천원으로 높은 반면, H농가는 314천원으로 낮아 농가간에 큰 소득 차이가 있었다. 결론적으로 낙농소득 향상을 위해서는 사양체계 개선에 의한 산유량 및 유지 율을 높이고, 위생적인 사양관리로 세균 수를 낮추며, 유방염의 예방 및 정기 검진에 의한 적정 처방으로 체세포 수를 경감시켜야 할 것으로 사료된다. This study was conducted to investigate the milk quality produced from dairy farms in Jeju province and to analyze the variety of pathogenes and the number of somatic cells in the milk. Data were collected from 262 lactating cows from 8 farms of three regions and the results obtained are summarized as follows, 1. The average daily milk yields and milk fat contents from June and October were 22.3 ㎏ and 3.7%, respectively. 2. The average number of bacterial counts in raw milk was 1.5×10^4/㎖, but that in farm A was over 3.0×10^4/㎖. 3. The somatic cell counts were 2.5×10^5/㎖ in average and those in farm G and H were higher than those in other farms. Their distribution in 262 lactating cows from June to October was as follows; less than 2.0×10^4 /㎖ in 68.8% of cows, 2.0-5.0×10^4/㎖ in 18.8% of cosws and more than 5.0×10^4/㎖ in 12.4% of cows. 4. Of the 113 isolates (compartments of cow udder) from mastitic milk, Staphylococcus aureus was found in 47, Streptococcus ogalatiae in 17 and Bacillus in 12. 5. The average monthly income of the farmers was 407 thousand won/head, and that in farm A or E was higher than that of farm H (456-475 thousand won vs. 314 thousand won) In conclusion, to improve income dairy farmers should reduce the somatic cell counts in the milk and mastitis infection through regular disinfection and inspection
월동기 청초급여가 젖소 산유량 및 유조성에 미치는 영향
진신흠,백윤기,조덕준,서문현,정창조 제주대학교 농과대학 제주도축산문제연구소 1991 畜産論叢 Vol.6 No.1
Effect of feeding fresh Italian ryegrass, oat forage and corn silage were compared for milk yield, butter fat percentage and milk components during winter period. Nine milking Holstein cows at mid lactation stage were used in the experiment.
겉뿌림 초지에 대한 삼요소시비수준이 초지생산성 및 식생에 미치는 영향
진신흠,고서봉,윤익석,이종렬,김문철 ( Sin Heum Jin,Seo Bong Ko,Ik Suk Yoon,Jong Yeol Lee,Moon Chul Kim ) 한국축산학회 1980 한국축산학회지 Vol.22 No.3
Orchardgrass (Dactylis glomerata C.), tall fescue (Festuca arundinacea L.), perennial ryegrass (Lolium perenne L.), Kentucky bluegrass (poa pratensis L.), and ladino clover ( Trifolium repens L.) were sown on a native grassl and dominated by Imperata cylindrica by the oversown method. When the different levels of nitrogen, phosphorus and potassium were applied, the following results were obtained : 1. The dry matter yields of whole pasture were increased by increment of nitrogen fertilizer. Of the newly sown pasture plants, the botanical composition of grasses was increased, but that of clover was decreased. 2. The botanical composition, however, was not influenced by the phosphorus and potassium level. The rate of the newly sown pasture plants in the second year was 20-63% and the ratio of the grasses and legume was 60 : 40. 3. There was statistically marked significance for the dry matter yield by the increment of nitrogen levels; 122.4㎏ (0 ㎏ N), 182. 6㎏ (O ㎏ N) and 230. 9㎏ (20㎏) per 10 a were shown in the first year while 111. 3㎏ (0 ㎏ N), 135. 2㎏ (10 ㎏ N) and 182. 8㎏ (20 ㎏ N) per l0a in the second year. 4. There was no difference among dry matter yields obtained from various phosphorus and potassium levels in the first year, whereas some increased yield was observed in the second year.
조아재비의 사료가치에 관한 연구 2 . 조아재비 , 존슨그라스 , 재래피의 영양소함량 비교 시험
진신흠(S . H . Jin),정창조(C . C . Choung) 한국축산학회 1993 한국축산학회지 Vol.35 No.6
Experiments were conducted to determine the effect of pasture altitude, fertilizer levels and maturity stage on Jo-a-jae-bee (Setaria chaadrachne, HONDA) production. Trials on nutrient contents of Jo-a-jae-bee in ccmparison with Johnson grass (Sorghum helepease (L.) pers) and Japanese millet (Echinocloa crusgalli var. frumentacea), respectively. Proximate analysis and assays for minerals of the hay and silage were determined. Crude protein content of the forages decreased but crude fiber and cell wall contents increased with maturity(P$lt;0.05). Ca contents in hays and silages of Jo-a-jae-bee, Johnson grass and Japanese millet were 0.23, 0.39 and 0.39%, 0.2d, 0.39 and 0.42%. respectively. Ca content in Jo-a-jae-bee was much lower than those in Japanese millet and Johnson grass. P content in hays and silages of Jo-a-jae-bee, Johnson grass and Japanese millet were O.19, 0.22 and 0.33% and 0.19, 0.27 and 0.33%, respectively. Fe was the only mineral that was higher in Jo-a jae-bee than in others.