飼糧中添加不同比率紫色狼尾草粉對土番鴨生長性能與屠體性狀之影響

Effects of supplementing different ratios of purple napiergrass powder in the diet on mule duck's growth performance and carcass traits

林榮新(Jung-Hsin Lin) ； 林正斌(Jeng-Bin Lin) ； 李姿蓉(Tzu-Rung Li) ； 張以恆(I-Heng Chang) ； 鄭智翔(Chih-Hsiang Cheng) ； 蘇晉暉(Chin-Hui Su) ； 劉秀洲(Hsiu-Chou Liu) ； 林雅玲(Ya-Ling Lin)

《畜產研究》 56卷2期 (2023/06) Pp. 97-104

https://doi.org/10.6991/JTLR.202306_56(2).0002

摘要

本試驗旨在探討飼糧中添加不同比率紫色狼尾草粉對土番鴨生長性能與屠體性狀之影響。0－3週齡土番鴨飼養於育雛室內，滿3週齡後，逢機分成對照組（未添加紫色狼尾草粉）、添加2、4及6%紫色狼尾草粉組，共計4處理組；每處理組3重複，每重複20隻，公母各半，共計240隻。3－10週齡的試驗飼糧含粗蛋白質15.4%及代謝能2,890 kcal/kg，各組皆等蛋白質及等代謝能。並於3、7及10週齡時，測定鴨隻生長性能。於10週齡時，每處理組逢機挑選公、母各3隻犧牲，以測定鴨隻屠體性狀。試驗結果顯示各處理組10週齡體重介於2,813－2,847 g之範圍，各組間並無顯著差異，但以添加6%紫色狼尾草粉組體重為2,847 g有較其他三組為重之趨勢。各處理組3－10週齡之平均隻日採食量介於148－152 g之範圍，各組間並無顯著差異。各處理組3－10週齡飼料轉換率介於3.08－3.13之範圍，各組間並無顯著差異。各處理組10週齡主翼羽長度介於15.9－17.0 cm之範圍，但以飼糧中有添加紫色狼尾草粉組者皆顯著較對照組為長（P<0.05）。飼糧中添加6%紫色狼尾草粉組胸肉445 g有較其他三組為重之趨勢。若同時考量體重、飼料轉換率、主翼羽長度及胸肉重等因素，建議土番鴨飼糧中添加6%紫色狼尾草粉為宜。

關鍵字

屠體性狀 ； 生長性能 ； 土番鴨 ； 紫色狼尾草

並列摘要

The purpose of this experiment was to investigate the effects of supplementing different ratios of purple napiergrass powder in the diet on mule duck's growth performance and carcass traits. In this experiment 240 mule ducks from hatched to 3 weeks of age were raised in the brooding house. After 3 weeks of age, ducks were randomly allocated into control group (no purple napiergrass powder added), 2, 4 and 6% purple napiergrass powder added groups, totally 4 treatment groups, and 3 replicates in each group, 20 ducks half male and female per replicate. The diet fed from 3 to 10 weeks of age contained 15.4% crude protein and 2,890 kcal/kg of metabolizable energy. All treatments were isocaloric and isonitrogenous. The growth performance of ducks was determined at 3, 7 and 10 weeks of age. At 10 weeks of age, 3 male and 3 female ducks were randomly chosen in each treatment and were sacrificed for carcass traits determination. The experiment results showed that the body weight at 10 weeks of age of each treatment was in the range of 2,813 to 2,847 g. There was no significant difference between the treatments, through the body weight of the 6% purple napiergrass powder added group was 2,847 g, which had a trend of heavier than the other three groups. The average daily feed intake of ducks from 3 to 10 weeks of age in each treatment was in the range of 148-152 g, with no significant difference between the groups. The feed conversion ratio from 3 to 10 weeks of age in each treatment was in the range of 3.08 - 3.13, with no significant difference between the groups. The primary feather length at 10 weeks of age of each treatment was in the range of 15.9 to 17.0 cm, and ducks fed diets containing purple napiergrass powder had longer primary feathers than the control group (P < 0.05). The 445 g breast meat in the group supplemented with 6% purple napiergrass powder in the diet tended to be heavier than the other three groups. If body weight, feed conversion ratio, primary feather length and breast meat weight are considered simultaneously, it is recommended to add 6% purple napiergrass powder to the diet.

並列關鍵字

Carcass traits ； Growth performance ； Mule duck ； Purple napiergrass