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아연의 공급형태와 첨가수준이 이유자돈의 생산성에 미치는 영향
안성호,엄재상,김대환,백인기 ( S . H . Ahn,J . S . Um,D . H . Kim,I . K . Paik ) 한국축산학회 1998 한국축산학회지 Vol.40 No.1
An experiment was conducted to study the effects of sources and levels of dietary Zn on the performance of the weanling pigs. Twenty four, 12 in each sex, 5 wks old 3-way crossbred (Y × L × D) pigs were assigned to 4 treatments of a 2 × 2 factorial design (Zn source × level). Zn sources were ZnO or methionine-Zn chelate (Met-Zn) and supplemental levels of Zn were 100 or 200ppm. Two pigs of each sex were housed in the raised floor pen and 3 pens were assigned to each treatment. Individual pig weight and feed intake of each pen were recorded weekly for 5 wks. Average daily feed intakes (ADFI) and average daily gains (ADG) were significantly (P$lt;0.01) different among treatments. ADFI and ADG were highest in Met-Zn-200 followed by ZnO-200, Met-Zn-100 and ZnO-100. The effects of supplemental Zn sources and levels and their interaction on ADFI were not significant. The effect of supplemental Zn level on ADG was significant (P$lt;0.05), but those of supplemental Zn source and interaction were not significant. There were no significant differences in feed conversion ratio and alkaline phosphatase activity in serum among treatments. IgG concentrations in serum were significantly (P$lt;0.05) influenced by the source, Met-Zn treatments being higher than ZnO treatments. The effects of level and interaction were not significant on serum IgG, however. The levels of Zn in serum were significantly (P$lt;0.01) different among treatments. Met-Zn-200 showed the highest level followed by ZnO-200, Met-Zn-100 and ZnO-100 in serum Zn level. The effects of source and level of supplemental Zn were significant (P$lt;0.01) on serum Zn. The levels of Zn in the feces were significantly (P$lt;0.01) affected by the level of supplemental Zn. The levels of Fe and Cu in serum and feces were not significantly affected by treatments. In conclusion, the source and level of supplemental Zn influence the performance of weanling pigs. Zn availability from Met-Zn is higher than that from ZnO. High serum IgG in Met-Zn treatments indicates improvement in the immune function. These may affect the performance of weanling pigs.
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