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題名 | 飼糧中添加甜菜[fe54]對肉雞抗熱緊迫能力之影響=Effect of Dietary Betaine Supplementation on the Heat Tolerance in Broilers |
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作者 | 陳慧泓; 姜樹興; | 書刊名 | 中華農學會報 |
卷期 | 2:3 2001.06[民90.06] |
頁次 | 頁210-216 |
分類號 | 437.714 |
關鍵詞 | 甜菜[fe54]; 熱緊迫; 肉雞; Betaine; Heat stress; Broilers; |
語文 | 中文(Chinese) |
中文摘要 | 以兩個試驗依次分別探討飼糧中添加甜菜□對肉雞抗熱緊迫能力之影響。試驗一及二均採2×3複因子設計,120隻初生公肉用雛雞,逢機分成六處理組,每處理四重複、每重複5隻,分別飼養於溫度控制室中,兩種溫度處理為:適溫(試驗第一天為33℃,往後每天調降0.3℃)或高溫(試驗第一天為36℃,往後每天調降0.2℃)。三種飼糧處理為:基礎飼糧,基礎飼糧+0.1%甜菜□,或基礎飼糧+0.5%甜菜□,試驗為期三週。飼料及飲水任食。綜合試驗一偶二之結果發現,高溫造成雞隻熱緊迫[降低增重及飼料採食量,提高死亡率(P<0.01)]及脫水[提高細胞外鈉及氯離子濃度及滲透壓(P<0.01)],但飼糧中添加甜菜□無論在高溫或適溫下皆改善肉雞之增重/飼料(P<0.01),其中尤其0.5%添加組最為明顯;且溫度與甜菜□間,在生長性能,細胞內外中離子濃度及滲透壓方面皆無交互作用存在。此結果顯示,飼料中添加0.5%甜菜□雖有利於肉雞之飼料利用效率,但與肉雞之飼養溫度無關,亦與肉雞之抗熱緊迫能力無關。至於甜菜□之最適添加量,財有待進一步訂定。 |
英文摘要 | Two experiments were conducted to investigate whether dietary betaine supplementation could improve the hat tolerance of broilers. In each experiment, 12 one-day old male Arbor Acres chicks were assigned to a 2×3 factorial design with 4 replicates of 5 chicks for each treatment. Chicks were raise fed in wire-floored cages in two temperature-controlled chambers, and fed on a corn-soybean meal based diet supplement with 0, 0.1 or 0.5% betaine, and were exposed to moderate (33℃ at first day and decreased 0.3℃ daily) or high (36℃ at first day and decreased 0.2 ℃ daily) ambient temperatures for 21 days. Feed and water were fed ad libitum. Pooled results from two experiments indicated that high ambient temperature caused the heat stress [weight gain and feed intake reduced, mortality increased (P<0.01)] and dehydration [extracellular sodium and chloride concentrations and osmolarity increased (P<0.01)] in broilers. However, dietary betaine supplementation, especially the 0.5% supplemented group, improved the gain/feed of broilers under both high and moderate temperatures (P<0.01), and no interactions between temperature and betaine among growth performance and blood electrolyte concentrations was observed. Overall, this study indicated that although supplementing 0.5% betaine in diet improves the feed efficiency, however, the improvement is not related to ambient temperature and heat tolerance of broilers. The optimal dietary betaine supplementation level remains to be determined. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。