飼糧中添加不同強化礦物質對離乳仔豬生長性能、血液性狀及免疫力之影響

本研究旨在探討飼糧中添加不同強化礦物質，對離乳仔豬生長性能、血液性狀及免疫力之影響。試驗採用32頭35 - 42日齡離乳LD雜交仔豬，平均體重約為10公斤，依體重逢機分配至4個處理組，每處理4重複，每重複(欄) 2頭。4個處理組分別為對照組(基礎飼糧)、鐵強化處理組(基礎飼糧+額外供給達推薦需要量2倍鐵)、硒強化處理組(基礎飼糧+額外供給達推薦需要量2倍硒)及錳強化處理組(基礎飼糧+額外供給達推薦需要量2倍錳)。試驗為期28天，試驗飼糧及飲水皆採任食。每週秤量體重與記錄採食量，並分別在試驗開始日與結束日採集血液，以供分析血液性狀，包括 PR-39與pBD-2之抗菌胜肽濃度及免疫球蛋白含量，並採集豬隻新鮮糞便分析微生物數量，藉以評估不同強化礦物質對離乳仔豬生長性能及免疫力的影響。試驗結果顯示，飼糧中鐵強化處理組、硒強化處理組及錳強化處理組，對離乳仔豬之體重、體增重、採食量及飼料轉換率，在各處理組間並無顯著差異。試驗結束日之血清中PR-39、pBD-2濃度及血漿中IgA含量，則以硒強化處理組顯著高於其他各處理組。糞便大腸桿菌數量，亦以各強化處理組顯著低於對照組。綜合上述結果，飼糧中硒強化處理組，在不影響仔豬生長性能下，可以提高血清中PR-39、pBD-2濃度及血漿中IgA含量，對提升仔豬免疫力具有正面之效果。

關鍵字

抗菌胜肽；免疫球蛋白；鐵；錳；仔豬；硒

並列摘要

The objectives of this study were to evaluate the effects of different fortified minerals on growth performances, blood traits and immunity of weanling piglets. Thirty-two 35-42 day old LD crossbred weanling piglets, weighed around 10 kg were randomly allocated into 4 treatments × 4 replicates experimental design with 2 pigs in each pen. Feed and water were provided ad libitum for the experimental period of 4 weeks. The four treatment groups were control group (basal diet), iron fortified treatment group (basal diet + 2 times the recommended amount of iron), selenium fortified treatment group (basal diet + 2 times the recommended amount of selenium) and manganese fortified treatment group (basal diet + 2 times the recommended amount of manganese). Body weight and feed consumption were recorded weekly. Blood samples were drawn on the start and final days of the test period for analysis of blood traits, including the antibacterial peptide concentration and immunoglobulin content of PR-39 and pBD-2. Fresh fecal samples were collected for microbial analysis. The results showed that there were no significant differences in body weight, body weight gain, feed intake and feed conversion ratio among all treatment groups. The concentrations of PR-39, pBD-2 in serum and IgA in plasma at the end of the experiment were significantly higher in the selenium fortified treatment group than in other treatment groups. The number of fecal E. coli counts were significantly lower in all the mineral fortified treatment groups than in the control group. In conclusion, the selenium fortified treatment group could enhance the serum PR-39, pBD-2 concentrations and plasma IgA content without affecting the growth performances of the piglets, which might result in positive effects on improving the immunity of weanling piglets.