https://scholars.lib.ntu.edu.tw/handle/123456789/87859
標題: | 延長光照處理對泌乳山羊之影響 | 作者: | 徐濟泰 | 關鍵字: | 乳山羊;延長光照;泌乳性能;Dairy goat;Long daily photoperiod;Milk production | 公開日期: | 2005 | 出版社: | 臺北市:國立臺灣大學動物科學技術學系暨研究所 | 摘要: | 延長光照為提升泌乳牛產能之重要方法;然而,此方法於泌乳羊產能影響並不清楚。本研究即企圖以延長光照提升泌乳山羊之產能。試驗動物為11 頭Alpine 經產羊及3 頭初產羊,依產次、分娩日期及體型平均分配於長日照組 (LP)與自然日照組(NP)。長日照組光照長度為16 小時 (0400 – 2000),光照強度設 定大於 600 lux。實驗期為22 週 (2005 年二月至八月)。兩組皆採 NRC 建議泌乳山羊營養需要量配製之相同日糧配方。每日擠乳2 次,並於每週末二日記錄乳量並採集乳樣進行乳組成分析。結果顯示延長光照處理對於乳糖、乳脂率及乳生菌數皆未有影響 (P > 0.05)。長日照組原始乳量則於泌乳前期 (第3、6 及7 週) 有提升之趨勢 (3.37 vs. 2.34 kg / d;3.54vs. 2.24 kg / d;3.61 vs. 2.54 kg /d;P < 0.10),4% 乳脂校正乳亦是相似結果。延長光照平均增加4% 乳脂校正乳乳量達30.2% (P = 0.208),並可增加採食量 41.4% (P <0.0001)。 The long daily photoperiod was proved to improve dairy cattle production; however, its effect on dairy goat was unclear. In this study, we intended to enhance dairy goat production by long daily photoperiod. Fourteen Alpine dairy goats (11 multiparous, 3 primiparous) were evenly assigned to long daily photoperiod (LP, 16 h of light and 8 h darkness/d) or natural daily photoperiod (NP) according to parity, kidding date, and body condition. Light were turn on at 0400 till 2000 for the LP group, and light intensity was set more than 600 lux at goats’ eyes level. The experimental period was 22 weeks after kidding (from Feb 2005 to Aug 2005). Same diet was offered to each group according to the NRC lactating dairy goat recommendation. Goats were milked twice daily, and milk were weighed and sampled on last two days each week. Results showed that long daily photoperiod had no effect on lactose and milk fat concentrations and raw milk total bacterial number (P > 0.05). Milk yield on weeks 3, 6, and 7 tended to be increased by long daily photoperiod (3.37 vs. 2.34 kg / d; 3.54 vs. 2.24 kg / d; 3.61 vs. 2.54 kg / d; P < 0.10). The 4% fat corrected milk (4%FCM) had similar results as milk yield. The long daily photoperiod increased 4%FCM and feed intake by 30.2% (P = 0.208) and 41.4% (P < 0.0001) on average. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/16471 | 其他識別: | 932313B002100 | Rights: | 國立臺灣大學動物科學技術學系暨研究所 |
顯示於: | 動物科學技術學系 |
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932313B002100.pdf | 272.98 kB | Adobe PDF | 檢視/開啟 |
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