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頁籤選單縮合
題名 | 環境溫度與高環境溫度下飼糧中添加抗壞血酸對白肉雞生長性能、血液成分及免疫反應之影響=Effects of Ambient Temperature and Dietary Ascorbic Acid Supplementation Under Constant High Ambient Temperature on the Growth Performance, Blood Parameters and Immune Response of Broilers |
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作者 | 林炳宏; 白火城; 許振忠; | 書刊名 | 中國畜牧學會會誌 |
卷期 | 27:1 1998.03[民87.03] |
頁次 | 頁11-23 |
分類號 | 437.714 |
關鍵詞 | 肉雞; 環境溫度; 抗壞血酸; 血液成分; 免疫反應; Broiler; Ambient temperature; Ascorbic acid; Blood parameters; Immune response; |
語文 | 中文(Chinese) |
中文摘要 | 本試驗之目的在探討環境溫度及高環境溫度下飼糧中添加不同含量之抗壞血酸( ascorbic acid ),對白肉雞生長性能、血液成分及免疫反應之影響。選取 21 日齡白色公 肉雞( Arbor Acres ) 80 隻,逢機分成五個處理組,分別為 (1) 持續適溫組( 24 ± 1 ℃),餵飼基礎飼糧,以作為對照組,(2) 持續高溫組( 34 ± 1 ℃), 餵飼基礎飼糧, (3) 持續高溫組( 34 ± 1 ℃), 餵飼基礎飼糧添加 250ppm 抗壞血酸,(4) 持續高溫組 ( 34 ± 1 ℃), 餵飼基礎飼糧添加 500 ppm 抗壞血酸,(5) 持續高溫組( 34 ± 1 ℃ ),餵飼基礎飼糧添加 1000ppm 抗壞血酸。每組 4 隻為一籠,並重複四次,飼養於環境溫 度控制室中,飼料及飲水均採任食,試驗期為三週。試驗雞隻於試驗開始前及試驗結束時分 別秤量個別體重及飼料採食量。 試驗雞隻於 22 及 29 日齡時由翼下靜脈注射 0.1ml 之 0.25% 綿羊紅血球懸浮液, 並在 21 (試驗前)、28、35 及 42 日齡分別採血,分離血清 測定血清中之金屬離子濃度、蛋白質成分及抗體力價,並於 42 日齡時測定血液 pH 值、血 球比容積及直腸溫度。試驗結果顯示,持續高溫組與適溫組比較,雞隻之體增重、飼料採食 量與飼料轉換率均顯著較差( P<0.05 ), 而直腸溫度及血液 pH 值則顯著較高( P<0.05 ),血球比容積及鈣離子濃度顯著較低( P<0.05 )。在免疫反應方面,無論在 28、35 或 42 日齡時雞隻血清中抗體力價, 均以持續高溫組較適溫組為低,尤以 42 日齡時雞隻血清 中之γ - 球蛋白含量,在高溫組顯著較低( P<0.05 )。 在持續高溫環境溫度下飼糧中添 加抗壞血酸 1000ppm 處理組, 顯著降低雞隻之直腸溫度、血液 pH 值及提高血球比容積( P<0.05 ), 添加抗壞血酸並有提高 28、35 及 42 日齡雞隻血清中對綿羊紅血球之抗體力 價及γ - 球蛋白含量之趨勢。 |
英文摘要 | The purpose of this study was to investigate the effects of ambient temperature and different levels of dietary ascorbic acid (L-ascorbic acid, coated; AA) supplementation under constant high ambient temperature on growth performance, blood parameters and immune response of broilers. Eighty male broilers ( Arbor Acres), 21 days of age, were in this study. The broilers were randomly allotted to five treatments, which were (1) constant moderate temperature (24 ± 1 ℃ ) and birds fed the basal diet as control, (2) constant high temperature (34 ± 1 ℃ ) and birds fed the basal diet, (3) constant high temperature and birds fed the basal diet supplemented with 250 ppm AA, (4) constant high temperature and birds fed the basal diet supplemented with 500 ppm AA and (5) constant high temperature and birds fed the basal diet supplemented with 1000 ppm AA. Each treatment had four replicates with four birds per cage. The experiment was carried out in climatic chamber. Feed and water were fed ad libitum. Body weight and feed intake data were recorded at the beginning and the end of the trial. The broilers were injected intravenously with 0.25% sheep red blood cells antigen 0.1 ml at 22 days of age and serum were separated for electrolyte concentration, protein constituents and antibody titer assays, Blood pH, hematocrit, and rectal temperature were determined at 42 days of age. The results showed that body weight gain, feed intake and feed conversion ratio of birds raised under constant high temperature were lower than those raised under constant moderate temperature (P<0.05). On the other hand, high ambient temperature increased the rectal temperature and blood pH of the birds (P<0.05), but decreased the hematocrit and calcium ion concentration (P<0.05). With regard to the effect of imune response, the antibody titer of birds raised under constant high temperature were lower than those raised under constant moderate temperature at 28, 35 or 42 days of age consistently. The addition of 1000 ppm AA to the basal diet significantly decreased the rectal temperature, blood pH and increased the hematocrit (P<0.05) comparing to the treatment without AA supplement when birds raised under constant high temperature. AA supplement tended to increase the serum antibody titer and γ - globulin concentration for broilers at 28, 35 and 42 days of age. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。