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무기태 인산제의 이용성에 관한 연구 5 . MAP 와 다른 사료용 인산제의 종류와 첨가수준이 육계의 성장 , 영양소이용율 , 혈액 및 경골성분에 미치는 영향
이돈우(D . W . Lee),오희정(H . J . Oh),한인규(I . K . Han),하종규(J . K . Ha) 한국축산학회 1987 한국축산학회지 Vol.29 No.5
Feeding and metabolic trials were conducted to study effects of source and level of dietary phosphorus on the growth rate, nutrient utilizability, blood and bone mineral compositions of broiler chicks. Phosphorus sources used were monoammonium phosphate (MAP), bone meal (BM), dicalcium phosphate (DCP) and tricalcium phosphate (TCP). Dietary phosphorus levels were 0.3(VL), 0.5(L), 0.7(0), 0.9(H) and 1.1%(VH), which were achieved by adding different levels of DCP. Results obtained are summarized as follows: 1. Adding BM as a dietary phosphorus source resulted in slightly better growing performance and nutrient utilization without statistical significance. Dietary phosphorus did not influence, the levels of serum Ca and P. However, bone Ca and P levels in chicks fed BM were much higher (P$lt;0.05) than those fed other phosphorus sources. 2. Optimum level of dietary phosphorus (0.7%) gave the best result in growth rate, nutrient utilization and bone calcification. Extreme phosphorus levels (0.3% and 1.1%) resulted in poor growing performance and nutrient utilization when compared with other three medium levels of dietary phosphorus (0.5, 0.7 and 0.9%).
대두박의 열처리시 온도가 단백질 및 아미노산의 이용성에 미치는 영향
이돈우(D . W . Lee),정광택(K . T . Chung),김병기(B . K . Kim) 한국축산학회 1991 한국축산학회지 Vol.33 No.10
This experiment was conducted to investigate the effect of heating temperature on the protein and amino acid utilization of soybean meal(SBM) in the rumen and small intestine. Soybean meal was treated at the temperatures of 100, 120, 140 and 160℃ in a dry oven and protection ratio of protein was calculated by the NH₃-N concentration changes measured by in vitro incubation at 3, 6 or 12 hrs for each treatment. The ruminal disappearance of heat treated soybean meal(HSBM, 140℃) was measured after of 3, 6, 12 and 24 hrs incubation in situ, and the intestinal utilization was measured by pepsin-HCI digestion method. The followings are the results obtained: In vitro NH₃-N concentration was significantly(P$lt;.01) decreased with increase of heating temperature. The protection ratio of protein was significantly increased with the increase of heating temperature; the increase was 100% in average at 140℃. The dry matter and protein disappearance of nontreated sobean meal (NSBM) and heat treated soybean meal in situ were increased as incubation time increased. Average dry matter and protein disappearance of HSBM were significantly higher than those of SBM The dry matter and nitrogen digestibilities of HSBM(26.22%, 39.17%) by HCI-pepsin digestion were significantly higher than those of NSBM(43.46%, 69%), but NSBM was higher than HSBM in total digestibility. The disappearance of arginine was high in NSBM while that of cystine in rumen was high in HSBM. Proline disappearance was low in both NSBM and HSBM. In average, rumen digestibility of total amino acid of NSBM was higher than that of HSBM, while utilization of essential amino acids was higher in HSBM.
질소시비수준이 Italian ryegrass 및 청예 옥수수의 질산염 축적에 미치는 영향
윤창,전우복,이돈우 ( C . Yoon,W . B . Chun,D . W . Lee ) 한국축산학회 1990 한국축산학회지 Vol.32 No.1
This study was conducted to investigate the influence of the level of nitrogen fertilization and cutting date on the nitrate accumulation in Italian ryegrass and forage corn. Italian ryegrass and forage corn were applied with three different levels of nitrogen fertilization(10, 20 and 40kg N/10a), and the experiment was performed at the field of CNU in kwang-ju, from 1986 to 1987. The results obtained were summerized as follows : l. Significant difference were observed in nitrate concentration in Italian ryegrass and forage corn when nitrogen fertilizer were applied(p $lt;0.05). 2. The concentration of nitrate in forage corn seems to be less than that in Italian ryegrass.
무기태린 공급제의 이용성에 관한 연구 2 . 사료용 제2인산 칼슘제의 첨가수준이 육계의 성장 , 영양소이용율 , 혈액 및 경골성분에 미치는 영향
한인규,하종규,이기웅,고종열,이돈우 ( In K . Han,J . K . Ha,K . U . Lee,J . Y . Ko,D . W . Lee ) 한국축산학회 1986 한국축산학회지 Vol.28 No.12
This study was carried out to assess effects of various levels of dietary phosphorus on the growth of broiler chicks, nutrient digestion and blood and bone parameters. Various levels of dietary phosphorus were added to experimental dits with dicalcium phosphate. Five treatments (LL; lower, L; low, O; optimum, H; high, HH; higher) having various dicalcium phosphate levels were involved in this trial. Feeding trials as well as metabolic trials and determination of bone and blood parameters were conducted. Of the various levels of phosphorus, a level (Optimum level in present trial) recommended. by NRC resulted in the best performance of chicks regardless of experimental period and modification of dietary ingredients. Parameters of bone, blood and digestibility and utilizability of nutrients were interrelated each other, but had little correlation with growth rate with a few exception.
무기태린 공급제의 이용성에 관한 연구 4 . MAP 의 첨가수준이 면양의 성장 , 영양소이용율 , 혈액성분에 미치는 영향
한인규(I . K . Han),하종규(J . K . Ha),고종열(J . Y . Ko),이기웅(K . U . Lee),이돈우(D . W . Lee) 한국축산학회 1987 한국축산학회지 Vol.29 No.1
Present study was conducted to compare effects of various levels of monoammonium phosphate (MAP) in promoting the growth of lambs, to determine nutrient digestion influenced by MAP levels, and to examine the effect of MAP levels on blood parameters. Various levels of dietary phosphorus were added to experimental diet with monoammonium phosphate. Four levels of MAP used in lamb trial were 0%, 0.4%, 0.8% and 1.2%. Feeding trial as well as metabolic trial and determination of blood parameters were conducted. Results obtained are summarized as follows. 1. Of the four MAP levels used in lambs studies, 0.4% MAP resulted in the best body weight gain. 2. Total feed intake and feed efficiency in sheep fed 0.4% MAP appeared to be higher than those fed 0%, 0.8%o and 1.2%, but differences were not significant. 3. Values of blood Ca, P and urea were erratic and no consistent trends were observed. 4. Increasing MAP levels in sheep diets did not significantly influence nutrient digestibilities and nitrogen retention.