屠體性能
6-2 屠體性能
各試驗戶於雞隻達十二、十四與十六週齡時,每戶分別逢機選取公雞與母雞各15隻,測定活體重、屠體重、頭頸、翅、胸、背軀、腿、腳、肝臟、砂囊、腹脂、心與睪丸(公)或卵巢(母)等各部位之重量;結果如
表13所示。台畜肉一號雞隻十二及十四週齡之屠體性能,除肝重及腹脂重之性別效應未達顯著水準外(P>0.05,表13),其餘性狀均顯著地受試驗戶或性別之影響(P<0.05)。如表13所示,所測定之各項屠體性狀,除肝重外,均以公雞者重於母雞者。腹脂測定方面,不論係以實際測得之重量或換算佔屠體重之百分率,均以母雞者重於公雞者;顯示母雞較公雞易於堆積腹部脂肪,惟其差異尚未達顯著水準(P>0.05)。一般而言,各屠體部位頭頸、翅、胸、背軀、腿及腳之重量與屠體重具中上程度的相關,故活體重與/或屠體重性別的差異顯著程度均與前述屠體部位之顯著性評估結果息息相關。性器官的發育亦受到飼養管理因素之影響。
表十三.畜試土雞台畜肉十三號十二∼十六週齡屠體性狀測定成績
單位:佔活體重之百分比
| | | | | | 性 | | | | 狀 | | | | |
週齡 | 活體重 | 屠體重
(%) | 頭頸
(%) | 翅
(%) | 胸
(%) | 背軀
(%) | 腿
(%) | 腳
(%) | 肝
(%) | 砂囊
(%) | 腹脂
(%) | 心
(%) | 睪丸
(%) | 卵巢
(%) |
12G | 1126.9a
±9.2 | 79.0b
±0.2 | 9.4a
±0.1 | 9.6a
±0.1 | 17.2a
±0.1 | 16.3a
±0.1 | 21.6a
±0.1 | 4.9a
±0.1 | 2.0a
±0.02 | 3.2a
±0.05 | 0.5a
±0.1 | 0.5a
±0.01 | 0.4a
±0.04 | 0.1a
±0.003 |
| (125) | (125) | (125) | (125) | (125) | (125) | (125) | (125) | (125) | (125) | (50) | (125) | (55) | (51) |
| | | | | | | | | | | | | | |
♂ | 1355.7a
±11.6 | 79.5a
±0.2 | 9.9a
±0.1 | 9.6a
±0.1 | 16.5a
±0.1 | 16.0a
±0.2 | 22.1a
±0.1 | 5.2a
±0.1 | 2.0a
±0.03 | 3.1a
±0.1 | 0.4a
±0.1 | 0.6a
±0.01 | ─ | ─ |
| | | | | | | | | | | | | | |
♀ | 1098.0b
±11.7 | 78.4b
±0.2 | 8.8b
±0.1 | 9.6a
±0.1 | 17.8b
±0.2 | 16.6b
±0.2 | 21.0b
±0.1 | 4.6b
±0.1 | 2.0a
±0.03 | 3.4b
±0.1 | 0.5a
±0.1 | 0.5b
±0.01 | ─ | ─ |
| | | | | | | | | | | | | | |
| | | | | | | | | | | | | | |
14G | 1374.8a
±10.1 | 79.6a
±0.2 | 9.5b
±0.1 | 9.4a
±0.1 | 17.3a
±0.1 | 16.4a
±0.1 | 22.5b
±0.1 | 4.6a
±0.05 | 1.8a
±0.02 | 3.0a
±0.05 | 0.5a
±0.1 | 0.51b
±0.01 | 0.6a
±0.04 | 0.07a
±0.01 |
| (127) | (127) | (127) | (127) | (127) | (127) | (127) | (127) | (127) | (127) | (41) | (127) | (64) | (53) |
| | | | | | | | | | | | | | |
♂ | 1542.3a
±10.0 | 80.2a
±0.2 | 10.1a
±0.1 | 9.5a
±0.1 | 16.5a
±0.1 | 16.1a
±0.2 | 23.1a
±0.1 | 4.9a
±0.1 | 1.8a
±0.03 | 2.8a
±0.1 | 0.3a
±0.1 | 0.53a
±0.01 | ˍ | ˍ |
| | | | | | | | | | | | | | |
♀ | 1207.3b
±13.1 | 79.0b
±0.2 | 8.9b
±0.1 | 9.3a
±0.1 | 18.1b
±0.2 | 16.6b
±0.2 | 21.8b
±0.1 | 4.3b
±0.1 | 1.9a
±0.03 | 3.1b
±0.1 | 0.7a
±0.1 | 0.49b
±0.01 | ˍ | ˍ |
| | | | | | | | | | | | | | |
| | | | | | | | | | | | | | |
16G | 1482.1a
±13.6 | 79.7a
±0.2 | 9.4a
±0.1 | 9.3a
±0.1 | 17.1a
±0.1 | 16.8b
±0.1 | 22.8b
±0.1 | 4.4a
±0.1 | 1.8a
±0.03 | 2.8a
±0.05 | 0.7a
±0.1 | 0.5a
±0.01 | 0.9a
±0.1 | 0.2b
±0.1 |
| (131) | (131) | (131) | (131) | (131) | (131) | (131) | (131) | (131) | (131) | (42) | (131) | (63) | (54) |
| | | | | | | | | | | | | | |
♂ | 1686.8a
±18.2 | 80.4a
±0.2 | 10.2a
±0.1 | 9.3a
±0.1 | 16.2a
±0.1 | 16.4a
±0.1 | 23.6a
±0.1 | 4.7a
±0.1 | 1.7a
±0.03 | 2.5a
±0.1 | 0.6a
±0.2 | 0.6a
±0.01 | ˍ | ˍ |
| | | | | | | | | | | | | | |
♀ | 1277.5b
±18.1 | 79.1b
±0.2 | 8.7b
±0.1 | 9.3a
±0.1 | 17.9b
±0.2 | 17.3b
±0.2 | 22.0b
±0.1 | 4.0b
±0.1 | 1.8b
±0.03 | 3.1b
±0.1 | 0.8a
±0.1 | 0.5b
±0.01 | ˍ | ˍ |
[(L12×L9)]♂×[(L7×L11)]♀
()數字表示樣品數。
同一週齡同一行字母不同者表示差異顯著 (P<0.05)。