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이유자돈에서 유제품 대체를 위한 혈청 단백질과 밀 글루텐의 평가
김인호,김춘수 ( I . H . Kim,C . S . Kim ) 한국축산학회 1998 한국축산학회지 Vol.40 No.2
Two experiments were conducted to determine the nutritional value of spray-dried porcine plasma (SDPP) and wheat gluten (WG) in diets for early-weaned pigs. In Experiment 1, 144 weanling pigs were used in a growth assay for 35 days. Experimental diets fed from day 0 to 14 postweaning were 1) a dried skim milk (DSM)-dried whey-soybean meal based as control and 2) and 3) SDPP and WG used to replace DSM on a protein basis. All pigs were fed the same corn-soybean meal-dried whey-based diet from day 14 to 35. For day 0 to 14, pigs fed SDPP had greater feed intake than pigs fed WG (P$lt;0.05). However, for day 14 to 21 (i. e., during the transition period to the Phase II diet), pigs fed diets with WG had the greatest rate of gain and feed intake compared with pigs fed DSM or SDPP during Phase I (P$lt;0.05). Overall, pigs fed diets with WG or SDPP had greater rates and efficiencies of gain than pigs fed DSM (P$lt;0.05). In Experiment 2, 108 weanling pigs were used in a growth assay for 35 days to determin the optimal blend WG and SDPP for use after weaning. Treatments were 1) 100% SDPP, 2) 50% SDPP and 50% WG, and 3) 100% WG. Similar to Experiment 1, all pigs were switched to common corn-soybean meal-dried whey-based diet for day 14 to 35. For day 0 to 14, there were no differences in growth performance. However, there was a quadratic response in gain/feed, with pigs fed the 50:50 blend having the lowest gain/ feed for day 14 to 35 and day 0 to 35 (P$lt;0.05). There was no difference in DM digestibility at day 13 postweaning. However, there was linear response in N digestibility when WG was increased (P$lt;0.10). In conclusion, SDPP improves growth rate for the initial postweaning phase. However, feeding WG during Phase I results in improved growth performance during the transition to the Phase II diet.
주요 대두제품과 영양소 ; 에너지 비율 조정 유무가 조기이유자돈의 성장능력에 미치는 영향
김인호,김지훈,김춘수 ( I . H . Kim,J . D . Hancock,M . R . Cabrera,J . H . Kim,C . S . Kim ) 한국축산학회 1998 한국축산학회지 Vol.40 No.2
Two experiments were conducted to determine the effects of various soybean preparations and dry extruded whole soybeans (DEWS) with or without adjustment for nutrient : calorie ratios on growth performance in early-weaned pigs. For Exp. 1, a total of 144 pigs (initial BW of 4.7 ㎏) was used in a 56-d growth assay to determine the effects of different soybean preparations on growth performance. Experimental diets were fed in three phases from d 0 to 35 postweaning (i.e., d 0 to 7, 7 to 21, and 21 to 35 postweaning). Treatments were a soybean meal (SBMrbased regimen, a DEWS regimen, and finally, a specially processed soy products (SP) regimen (i.e., soy isolate from d 0 to 7, soy concentrate from 7 to 21, and extruded soy flour from 21 to 35). On d 35 postweaning, the pigs were switched to a common SBM-based grower diet for a period of 3 wk. For d 0 to 7, pigs fed SBM gained 21% less (P$lt;0.001) and were 24% less efficient (P$lt;0.003) than pigs fed the DEWS and the soy protein isolate (P$lt;0.001). Average daily feed intake (ADFI) was not affected by dietary treatments, however, pigs fed the soy protein isolate had the greatest average daily gain (ADG) of any treatment (P$lt;0.02), and numerically, the best efficiencies of gain. No statistical differences were found for ADG, ADFI, or gain/ feed among treatments from d 7 to 21, 21 to 35, and 35 to 56 of the experiment (P$gt;0.12). For Exp. 2, 72 weanling pigs (4.8 ㎏ avg BW) were used. Treatments were 1) corn-SBM-based control; 2) and 3) corn-DEWS with or without nutrient calorie ratios adjusted. Frorp d 0 to 7, pigs fed with DEWS trended to Dave better gain/feed (P$lt;0.09) than those fed diets with SBM. From d 0 to 17, pigs fed DEWS had dower ADFI (P$lt;0.04) and a trend for better gain/feed (P$lt; 0.07) than pigs fed SBM. However, overall (d 0 to 31), there were no differences (P$gt;0.22) in ADG or gain/feed among pigs fed SBM vs DEWS, but pigs fed DEWS had a 7% numerical advantages in gain/ feed. In conclusion, DEWS can be used to replace 100% of the SBM in diets for early-weaned pigs without negative affects on growth performance.