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어린 돼지에 대한 Sulfachloropyridazine + Trimethoprim 합제의 성장촉진 효과
최진호,최형송 ( J . H . Choi,H . S . Choi ) 한국축산학회 1985 한국축산학회지 Vol.27 No.7
To evaluate the effects of a mixture of sulfachloropyridazine sodium (100 ppm) + trimethoprim (20 ppm) in promoting growth and improving feed efficiency of starting pigs, a total of 80 weaning three-way crossbred (Yorkshire × Landrace × Duroc) pigs weighing an average of approximately 10㎏ was used for a period of 50 days. Animals were divided into 8 pens of 10 pigs each. Each pen was assigned to one of 2 treatments with 4 replications (2 pens of males and 2 pens of females). Animals were fed a pig starter diet either with or without supplementation of sulfachloropyridazine sodium + trimethoprim (S + T). Pigs fed the diet containing S+T mixture gained significantly (P $lt; 0.01) more weight than nonmedicated control pigs. Medicated animals consumed numerically more feed than nonmedicated animals and feed efficiency was improved by feeding S+T mixture, although differences in feed intake and feed efficiency were not statistically significant.
무기능 유황에 의한 메치오닌 대치가 부로일러의 성장율 및 영양소 대사에 미치는 영향
최진호,한인규 ( J . H . Choi,In K . Han ) 한국축산학회 1974 한국축산학회지 Vol.16 No.1
A total of 468 day-old broiler chicks of Shaver strain was used in this experiment to study the effects of substitution of different levels of sodium sulfate for methionine on the growing performance, nutrient utilizability, serum amino acid content and retention of nitrogen and sulfur for a period of 6 weeks. Three levels of methionine (0, 0.2 and 0.4%) and four levels of sodium sulfate (0, 0.1, 0.3 and 0.6%) were arranged by 3×4 factorial design. The results obtained from a series of experimentation are summarized as follows; 1. A little improvement in growth rate and feed efficiency of chicks was obtained from adding sodium sulfate to a diet deficient in sulfur amino acids, although no statistical significance was found. 2. Concentration of almost all the neutral and acidic amino acids in serum hydrolyzates was decreased by feeding sulfur amino: acid-deficient and inorganic sulfate-supplemented diets. This finding was interpreted to mean that more amino acids had been incorporated into muscle protein than into serum protein by methionine-sparing action or some other possible specific actions of sulfate. The concentration of methionine itself was not decreased. This would mean that free methionine concentration in: serum was increased. 3. Dry matter and nitrogen free extract utilizations by chicks were increased with increasing levels of sodium sulfate but were decreased by increasing the dietary methionine level. Metabolizable energy content per kilogram of diet was also increased by adding sodium sulfate to the diet with low level of methionine and decreased by methionine supplementation (P$lt;0.01). 4. Nitrogen retention data showed the similar trend to those of utilizability of the other nutrients (P$lt;0.01). Significant interaction between methionine and sulfate was also found (P$lt;0.05). 5. Data for sulfur balance were largely dependent on nitrogen balance data with correlation coefficient, r=0.81 (P$lt;0.01). It is concluded from the results that growth response of chicks to sodium sulfate was at lean partially attributed to the action of sulfate to enhance utilizability of some nutrients and that sulfur metabolism was intimately related to metabolism of nitrogen. In this regard, more extensive studies are to be made to set up the metabolic significance of sulfur and dietary requirement of animals for sulfur.