臺灣博碩士論文加值系統

本試驗旨在探討飼糧中不同濃度或鏈長之中鏈三酸甘油酯(medium chain triglycerides；MCT)對肉雞體脂蓄積、脂肪酸組成、血液性狀及葡萄糖耐受性之影響。試驗一，600隻初生肉雞，逢機分配至四處理組，每處理六重複，每重複25隻，分別飼予含MCT（含C6:0，C8:0及C10:0）（1）0；（2）1.6；（3）4.0或（4）6.4％之玉米－大豆粕飼糧。試驗二，300隻初生肉雞，逢機分配至三處理組，每處理四重複，每重複25隻，分別飼予含4％大豆油、椰子油（含C12:0）或C6油（含C6:0）之玉米－大豆粕飼糧，試驗為期36日。測定肉雞之生長性能，腹脂蓄積，血漿中葡萄糖及膽固醇濃度，腹脂、胸肉及腿肉（帶皮）中總脂肪含量與脂肪酸組成及葡萄糖耐受性。試驗一結果顯示，飼糧中含6.4% MCT時，降低0-36日齡間增重及飼料採食量，腹脂蓄積及腿肉（帶皮）脂肪含量（P<0.05）。飼料利用效率及死亡率則各組間並無顯著差異。C6:0無法蓄積於組織中，C8:0及C10:0可蓄積於組織中，而以C10:0蓄積率較C8:0為佳，且以腿肉（帶皮）中蓄積率最高，胸肉最低。飼糧中含6.4% MCT時，肉雞血漿中膽固醇及HDL-膽固醇濃度顯著高於對照組（P<0.05）。葡萄糖濃度則未受飼糧中MCT濃度之影響。飼糧中不同濃度MCT皆改善肉雞葡萄糖耐受性（P<0.05）。試驗二結果顯示，飼糧中椰子油或C6油皆不影響肉雞0-36日齡間生長性能及體脂蓄積。C6:0無法蓄積於組織中，C12:0則可蓄積於組織中。飼糧中椰子油或C6油皆不影響肉雞血漿中膽固醇、葡萄糖濃度及葡萄糖耐受性。綜合以上， 飼糧中含C8:0及C10:0，可降低肉雞體脂肪蓄積，增加血漿中膽固醇及HDL-膽固醇濃度，並改善葡萄糖耐受性，C6:0及C12:0則否。C8:0，C10:0及C12:0可蓄積於體組織中，而C6:0則否。

Two trials were conducted to examine the effects of different levels or chain lengths of medium-chain triglycerides in diet on fat deposition, fatty acid composition, blood parameters and glucose tolerance of broilers. Trial 1, 600 newly hatched Arbor Acres chicks were allotted to four treatments, six replicates per treatment and 25 chicks per replicate. Chicks were fed diets containing (1) 0; (2) 1.6; (3) 4.0 or (4) 6.4% MCT (containing C6:0, C8:0 and C10:0) for 36 days. Trial 2, 300 newly hatched Arbor Acres chicks were allotted to three treatments, four replicates per treatment and 25 chicks per replicate. Chicks were fed diets containing 4% of (1) soybean oil; (2) coconut oil (containing C12:0) or (3) C6 oil (containin C6:0) for 36 days. Growth performances, abdominal fat deposition, plasma glucose and cholesterol levels, fat content and fatty acid composition of abdominal fat, breast and thigh meat (with skin), and glucose tolerance were measured.Results of trial 1 showed that diet containing 6.4% MCT decreased day 0-36 weight gain and feed intake, abdominal fat deposition and fat content of thigh (with skin) (P<0.05). Feed efficiency and mortality were not affected by the dietary MCT. C8:0 and C10:0 but not C6:0 could be deposited in the tissues. C10:0 had a better deposition efficiency than C8:0 had. Thigh (with skin) had a better deposition efficiency than breast had. Diet containing 6.4% MCT increased plasma total and HDL cholesterol content (P<0.05). Plasma glucose content was not affected but the glucose tolerance was improved (P<0.05) by the dietary MCT.Results of trial 2 showed that diet containing coconut oil or C6 oil did not affect day 0-36 growth performances and abdominal fat deposition. C12:0 but not C6:0 could be deposition in the tissues. Diet containing coconut oil or C6 oil did not affect plasma glucose, cholesterol levels, and glucose tolerance.In conclusion, diet containing C8:0 and C10:0 but not C6:0 or C12:0 could decrease the body fat deposition, increase plasma cholesterol and HDL-cholesterol, and improve the glucose tolerance in broilers. C8:0, C10:0 and C12:0 but not C6:0 could be deposited in the tissues of broilers.

目次--------------------------------------------------I
表次索引----------------------------------------------IV
圖次索引----------------------------------------------VI
文獻檢討-----------------------------------------------1
一、脂質之定義------------------------------------------1
二、脂質之分類------------------------------------------1
三、中鏈三酸甘油酯---------------------------------------8
摘要--------------------------------------------------37
前言--------------------------------------------------39
材料與方法---------------------------------------------42
結果--------------------------------------------------53
討論--------------------------------------------------74
結論--------------------------------------------------82
參考文獻-----------------------------------------------83
英文摘要-----------------------------------------------97
附錄--------------------------------------------------99

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