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題名 | 影響植酸酶促進豬隻對磷消化率之因子--植酸酶來源及有機酸=Factors Affecting the Efficacy of Phytase in Improving Phosphorus Digestibility in Pigs-Phytase Source and Organic Acid |
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作者姓名(中文) | 張家維; 姜樹興; | 書刊名 | 中國畜牧學會會誌 |
卷期 | 26:2 1997.06[民86.06] |
頁次 | 頁117-134 |
分類號 | 437.654 |
關鍵詞 | 磷; 植酸酶; 有機酸; 消化率; 豬; Phosphorus; Phytase; Organic acid; Digestibility; Pigs; |
語文 | 中文(Chinese) |
中文摘要 | 本試驗旨在探討植酸�t來源及飼糧中添加有機酸,是否會影響植酸�t促進豬隻對 磷消化率之效果。 試驗一,探 3 × 3 拉丁方格設計。三頭於迴腸末端裝置 T 型�硎牏抓I 公豬,個別飼養於代謝架中, 分三階段分別飼予三種試驗飼糧:(1) 低磷玉米 - 大豆帕基 礎飼糧;(2) (1) + 800 單位國產植酸�t╱公斤或 (3)(1) + 800 單位進口植酸�t╱公斤 。收集豬隻迴腸末端消化物。結果顯示,國產及進口植酸�t分別提高 (P<0.05) 迴腸末端磷 消化率 17 及 15 個百分點,兩者效果相近,顯示國產植酸�t與進口者效力相近。試驗二, 採 2 (飼糧中不添加或添加 2 %延胡索酸 ) × 3 (飼糧中不添加而添加 800 單位國產或 進口植酸�t╱公斤 ) 複因子設計。 24 頭剛離乳之雜交閹公豬,分別飼予上述 6 種飼糧處 理組。試驗為期 10 天,於第 10 天時將豬隻電擊�E牲之,收集不同段消化道內容物及糞便 。 結果顯示,飼糧中添加植酸�t可降低十二指腸 (P<0.05)、空腸、迴腸及大腸段內容物及 糞便 (P>0.001) 中磷含量;並提高迴腸、大腸及全腸道磷消化率 (P<0.05),而國產及進口 植酸�t間,除了在空腸及大腸段內容物中磷含量方面,國產低於進口植酸�t組 (P<0.05) 外 ,其化各段消化道中之磷含量及消化率,兩者間差異均不顯著。飼糧中添加延胡索酸,並不 能降低胃腸道 pH,亦無法進一步提高植酸�t改進磷利用率之效果。 綜合上述結果顯示,植 酸�t提高磷消化率之效果並不受植酸�t來源 (國產對進口 ) 及添加有機酸之影響。 |
英文摘要 | The purpose of the study was to determine whether phytase source or dietary organic acid supplementation would affect the efficacy of phytase in improving phosphorus digestibility in pigs. In train 1, three ileal cannula-fitted barrow (30 kg BW) were allotted to a 3 × 3 Latin square design. Pigs were fed one of the three corn-soy diets: (1) low- P basal diet (containing 0.34% P); (2) basal diet added with 800 units domesticallly-produced phytase/kg; or (3) basal diet added with 800 units imported phytase/kg. The ileal digesta was collected and digestibility of phosphorus was determined. Results showed that both domestically-produced and imported phytase increased (P<0.05) ileal P digestibility by 17 and 15 percentage units, respectively. In trial 2, twenty-four crossbred weanling pigs (4-wk old, 8 ∼ 10 kg BW) were allotted to a 2 (unsupplemented or supplemented with 2% fumaric acid) × 3 (unsupplemented or supplemented with either 800 unit/kg diet of domestically-produced or imported phytase) factorial arangement and were fed one of the six corn-soy diets. Pigs were sacrificed 10 days after fed the experimental diets. The disesta from different segments of alimentary tract and feces were collected. Results indicated that phytase reduced (P<0.05) the P contents in digesta from duodenum (P<0.05), jejunum, ileium, large intestine and feces (P<0.001), and improved (P<0.005) the P digestibility in ileum, large intestine and feces. Except a lower P contents in ileum and large intestine in domestically-produced than in imported phytase group, there were no differences in content and digestibility of P in other segment of alimentary tract between two sources of phytase were found in pigs. Dietary organic acid supplementation had no effect on the efficiency of two sources of phytase in further improving P digestibility in pigs. In summary, neither phytase source (domestically-produced vs. imported phytase) nor dietary organic acid supplementation affects the efficacy of phytase in improving the phosphorus digestibility in pigs. |
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