뒷흰가는줄무늬밤나방은 열대거세미나방 성페로몬 트랩에 지속적으로 상당수 유인되는 있는 비래해충이지만, 국내에서 뒷흰가는줄무늬 밤나방에 대한 정보는 매우 미흡한 실정이다. 향후 뒷흰가는줄무늬밤나방에 대한 다양한 연구 진행을 위해서는 대량사육에 관한 선행연구가 요구 된다. 본 연구에서는 뒷흰가는줄무늬밤나방 대량사육을 위한 인공사료 2종의 개별 및 조합 공급과, 집단 또는 개체사육이 발육 및 산란에 미치는 영향을 분석하였다. 기존 나방류 사육용 2종의 인공사료에 대한 발육특성을 비교한 결과, 검거세미나방 인공사료 제공시 유충은 높은 생존율과 빠른 발육을 보였으나, 번데기 무게는 감소하였다. 2종 인공사료 간 산란수에는 유의한(P < 0.05) 차이가 없었다. 집단사육은 개체사육에 비해 유 충의 빠른 발육과 번데기 무게 및 생존율 감소를 야기하였다. 또한, 먹이와 사육 방법에 따라 암컷과 수컷에 미치는 영향이 달랐다. 뒷흰가는줄무 늬밤나방의 대량 사육을 위해서는 부화 직후 검거세미밤나방 인공사료를 이용해서 집단 사육한 후, 2령 혹은 3령 이후에는 개체사육하는 것이 효 율적일 것으로 판단되었다.

The odor substances generated in a feed manufactory operating for the commercialization of animal-vegetable materials were analyzed and the odor reduction efficiency by a chemical scrubber was evaluated. The major causative substances in the feed manufactory comprised about 45.4% of ketone compounds and about 13.3% of aldehyde compounds. On the other hand, the removal efficiencies of diacetyl and acetoin as ketone compounds were 77.3% and 78.1%, respectively, by a chemical scrubber. Additionally, the removal efficiencies of acetaldehyde, butyraldehyde, valeraldehyde, 2-furancarboxaldehyde, and nonanal were 86.0%, 78.9%, 67.4%, 52.8%, and 71.9%, respectively. These rates were higher than the odor generation substance contribution rate as a result of treating the exhaust gas generated from the feed manufactory by the chemical scrubber using 5% of C3. It was also found that xylene, methylcyclopentane, benzene, ethylbenzene, 1,3,5-trimethylbenzene, and decane were almost not removed.

Recently, in Korea various kinds of genetically modified (GM) crops have been imported and used as a raw material to manufacture foods and livestock feeds, but the different social concerns about the benefits and the potential risks of GM crops are being shown with a different reaction from the public. Thus a persistent management is required for the safe utilization of genetically modified organism (GMO). PCR analysis of transgene into crop is generally performed for the efficient post management of GMOs. The most important prerequisite for the application of nucleic acid detections is to decide the effective DNA-extraction methods. Particularly, in the case of processed feeds, the nucleic acids of which may be damaged by heating, high pressure, pH treatments, fermentation, etc. in processing, DNA must be extracted with high sensitivity from the samples to perform the PCR successfully. In this study, seven of DNA-extraction methods used commercially and non-commercially were compared with respect to the yields and quality of DNA extracted from livestock feeds and those crop materials. Amounts of genomic DNA obtained from the extraction methods varies according to feed configurations and crop materials. The DNA yield and uniformity of samples extracted with PG, CTAB, and QF method is greater than that obtained from other extraction methods. In the DNA integrity of the selected extraction methods, PCR analysis showed distinct amplifications and similar patterns in detecting crop endogenous genes and GMO genes. These results would be applicable for the selection of an adequate DNA-extraction method in extracting processed feeds and/or crop materials.

본 연구는 섬유소분해 효소제를 공급수준에 따라 비육전기 및 비육후기 한우 거세우에 적용하였을 때 성장 및 도체성적에 미치는 영향을 조사하기 위하여 수행하였다. 시험동물은 비육전기 및 비육후기 거세우로 각각 54두씩 총 108두를 대상으로 하였으며, 시험 개시 시 공시된 비육전기 및 후기 거세우의 평균체중은 각각 397.4±27.2(평균 17개월령), 525.2±47.4kg(23개월령) 이었다. 시험사료는 비육전기사료와 비육후기 사료를 구분하여 대조구 사료에 섬유소분해 효소제 0.05(E0.05, L0.05), 0.15% (E0.05, L0.15)를 첨가한 비육전기 및 비육후기 각각 3처리구에 각 처리당 6마리씩 3반복으로 완전임의배치하여 실시하였다. 비육후기 한우 거세우에서 농후사료 섭취량은 대조구와 L0.15구에서 L0.05와비교하여 증가하였으며, 총 건물섭취량 역시 동일한 결과를 나타냈다(p<0.001). 반면, 비육전기 및 후기 한우 거세우 모두 증체량 및 사료효율은 유의한 차이를 나타내지 않았다. 한편 비육후기 거세우의 도체특성은 L0.05와 L0.15구에서 대조구와 비교하여 지방색이 유의하게 높은 것으로 조사되었다 (p<0.01). 등심조직의 지방산 분석은 대조구와 처리구는 유의한 차이를 나타내지 않았다. 결과적으로 본 시험에 사용된 섬유소 분해효소의 비육기 한우 거세우에 대한 첨가효과는 등심의 지방색이 짙어진 것을 제외하고 없는 것으로 나타났으며, 추후 볏짚 위주의 조사료 급여체계에서 효소제 첨가수준 및 효소역가에 대한 추가적인 연구가 필요할 것으로 판단된다.

본 연구는 한우 거세우 95두 (평균체중 226 kg)를 이용하여 농후사료와 조사료 분리급여구, TMR구 그리고 TMR을 발효시킨 F-TMR구로 나누어 22개월동안 사육하여 도축하였을 때, 사료효율, 도체성적 및 경제성분석에 미치는 영향을 조사하기 위하여 실시되었다. 건물 및 TDN 섭취량은 육성비육 각 단계 별로 F-TMR구에서 가장 많았다 (p<0.05). F-TMR구의 경우, 일일증체량은 육성기에는 처리구중 가장 적었으나, 비육후기에는 타 처리구에 비해 약 48%나 높았다 (p<0.05), 사료효율은 전 육성비육기간 동안 비슷한 수준으로 유지되었다. 도체중과 배최장근단면적에서는 F-TMR 급여구에서 가장 높았으나 (p<0.05), 등지방두께가 가장 얇았던 (p<0.05) 분리급여구에서 육량지수와 육량 A등급 비율이 높았다. F-TMR구의 근내지방도가 타구에 비해 현저히 (p<0.05) 증가되어 육질 1+등급이상 출현율이 96%에 달하였다. 경제성 분석에서 사료비는 F-TMR구가 분리급여구에 비해 40%가 증가되었으나 증체량과 육 질등급의 향상으로 인하여 순수익은 29%나 증가되었다.

A field study was conducted to compare growth, feed utilization and nutrient excretions by feeding extruded pellet (EP) and moist pellet (MP). Slow growing flounder were used as the experimental animal to find out a prominent result in terms of growth and feed utilization. Weight gain of fish fed the experimental diets for 8 weeks reached 105.3 g for EP and 107.1 g for MP, while fresh feed intake was 98.7 g for EP and 279.4 g for MP. Feed conversion ratio was 0.94 and 2.61 for EP and MP, respectively which was 0.77 and 0.94 when corrected on dry matter basis. Even though protein efficiency ratio (2.26 vs 2.21), specific growth rate (0.69% vs 0.70%), daily weight gain (2.06 g vs 2.10 g) and mortality (4.0% vs 4.1%) were similar between EP and MP, protein retention efficiency of fish fed EP was superior (53.3%) to that of fish fed MP (39.6%). Protein intake of fish for 8 weeks was similar from 52.3 g for EP to 53.3 g for MP, while protein gain was higher in fish fed EP (27.9 g) than in fish fed MP (21.1 g). Protein excretion by feeding EP and MP reached 232 g and 300 g, respectively per kg gain, suggesting that protein loads could be greatly reduced in practical culture system through the use of EP. Phosphorus (P) intake was much lower in fish fed EP (1.63 g) than in fish fed MP (2.18 g), while retention of P was higher in fish fed EP (0.88 g) than in fish fed MP (0.78 g), showing the retention efficiency of 54.0% and 35.9%, respectively. Fish fed EP excreted 7.1 g of P per kg gain which was much lower than that of fish fed MP (13.1 g). The present results clearly showed that EP feeding for flounder is not only productive but also environmentally friendly.

This study was carried out to obtain good livestock production in comparison with 3 different pasture mixture (Control : TI = Potomac orchardgrass + Bastion perennial ryegrass + Fawn tall fescue + Regal white clover, T2 = Potomac orchardgrass + Bastion pe

Ulmus davidiana Nakai (UDN) has been traditionally used as a herbal medicine in Korea. In the present study, we investigated the anti-ecotoxic potential of a 116 kDa glycoprotein isolated from UDN (UDN glycoprot ein) in regulating fecal malodor and feed efficiency in mice. We found that UDN glycoprotein (200 μg/ml) has an inhibitory effect on the cell death induced by an ecotoxicological endocrine disrupting chemical, bisphenol A, in colon epithelial HT-29 cells. UDN glycoprotein did not show significant differences regarding the weight of ecotoxicity-related organs (liver, heart, kidneys, and spleen) and the levels of serum glutamate oxaloacetate transaminase, glutamate pyruvate transaminase, and lactate dehydrogenase in mice for 2 weeks, compared to the control. Additionally, UDN glycoprotein reduced the levels of hydrogen sulfide and ammonia as markers of fecal malodor in mice. Interestingly, UDN glycoprotein can improve the mouse feed efficiency. In conclusion, our data indicate that anti-ecotoxicological UDN glycoprotein has the ability to increase the feed efficiency and reduce the fecal malodor by maintaining the viability of colonic epithelial cells in mice.