篇名 | 生醫用兔適當飼糧粗蛋白質與中洗纖維含量探討 – 紐西蘭白兔離乳仔兔 |
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卷期 | 46增刊 |
並列篇名 | Optimal dietary crude protein and neutral detergent fiber level for laboratory rabbit- New Zealand white weaned rabbit |
作者 | 李宗育 、 蔡佩均 、 施柏齡 、 范耕榛 |
頁次 | 234-234 |
關鍵字 | 生醫用兔 、 粗蛋白質 、 中洗纖維 、 Crude protein 、 Laboratory rabbit 、 Neutral detergent fiber |
出刊日期 | 201712 |
離乳仔兔因盲腸發育尚未健全,應需要高營養飼糧同時限制飼糧中纖維含量。本計畫探討生醫 用離乳仔兔飼糧中蛋白質與中洗纖維的適當含量,以期提升生醫用兔育成率。試驗採用一個 3 x 3 複因子設計,即飼糧之粗蛋白質(CP)含量分別為 14、16 或 18%,中洗纖維(NDF) 含量分別為 25、28 或 31%。將 108 隻 5 週齡紐西蘭白兔,逢機分入 9 組進行 4 週飼養 試驗,仔兔採個別籠飼養。每週記錄兔隻體重、採食量與飼料效率,以計算生長性能;每 2 週 採血一次,分析血液生化數值及免疫球蛋白含量,以評估仔兔健康狀況;記錄全期仔兔育成率。 試驗結果顯示,飼糧配製的 CP 含量與設計值接近,但 NDF 超出設計值 2 - 3%。試驗前 2 週, 飼糧 CP 含量顯著影響兔隻日增重(P < 0.05),飼糧 CP18% 與 NDF28% 組有助於提升仔 兔之體增重,優於飼糧 CP14% 與 NDF25% 組(P < 0.05)。試驗全期離乳仔兔餵給 CP18% 與 NDF31% 飼糧之仔兔的下痢及死亡數最高,餵給 CP14% 與 NDF25% 飼糧時,下痢情形 最低,育成率最高,因此推薦為仔兔離乳後 4 週的飼糧適當營養濃度。
For just weaned young rabbit, cecum development is not mature, they need more nutritive diet which limits the fiber level. In this study, the proper dietary crude protein (CP) and neutral detergent fiber (NDF) level was investigated to promote the survival rate of just weaned New Zealand white rabbit. A 3 x 3 factorial design was applied by using a total of 108 5-wk-old weaned rabbit raised in individual cages for four weeks. Three dietary CP levels were 14, 16 or 18% and NDF levels were 25, 28 or 31%, respectively. Body weight, feed intake, feed conversion ratio and survival rate were measured weekly. Blood samples taken every two weeks were analyzed for biochemical composition and immunoglobulin to assess the health status. Results showed dietary CP contents were close to formulation design, however analyzed NDF values were higher than design by 2 to 3%. For the first two weeks of trial, CP level turned out to be the important factor influencing the daily gain of young rabbits (P < 0.05). Rabbits fed diet with CP18% and NDF28% had the higher weight gain than those fed diet with CP14% and NDF25% (P < 0.05). Throughout the 4-wk trial period, weaned rabbits fed diet with CP18% and NDF31% had the highest diarrhea occurrence and death loss. Diet with CP14% and NDF25% could decrease the diarrhea and had the highest survival rate. Thus this formula is recommended as the optimal dietary CP and fiber level for young rabbits for four wks after weaning.