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                                                                                                                                              首頁 > 技術與支持 > 體外模擬消化技術在生產中的應用
                                                                                                                                              體外模擬消化技術在生產中的應用
                                                                                                                                              點擊次數:526 發布時間:2021-04-23
                                                                                                                                                體外模擬消化技術是通過模擬動物消化生理特點,采用與動物體內相近的消化環境和消化酶系,在體外評定飼料消化吸收的一種方法。其優點是:試驗條件可控,干擾因素少,結果的重現性較好,試驗時間短,成本低。但體外消化模擬技術是處于非生理狀態下的儀器檢測,其結果的準確性需要通過體內試驗加以驗證。
                                                                                                                                                隨著研究者對動物消化生理研究的不斷深入和現代科學技術的發展,體外消化模擬技術也日益成熟。大量試驗研究表明,通過體外消化模擬技術所獲得的飼料養分消化率與其體內養分消化率之間存在顯著相關,體外消化模擬技術在生產中主要應用于以下幾方面:
                                                                                                                                                一、預測飼料養分消化率
                                                                                                                                                飼料生物學價值的準確評價,是合理利用飼料原料,為畜禽提供精準營養的前提。通過體外模擬消化試驗,測定飼料原料或產品養分消化率,建立飼料營養價值數據庫,是開發畜禽消化仿生模擬器的主要目的。試驗證實,體外模擬裝置設計越合理,對飼料評價越準確。
                                                                                                                                                二、對飼料添加劑進行效果評價
                                                                                                                                                對某些促消化功能性飼料添加劑進行效果評價,也是應用體外模擬技術的意義之一??稍u價的添加劑主要是指能夠直接促進養分降解,或提高畜禽體內消化酶活性、補充消化酶不足的添加劑類,包括酸化劑、酶制劑等。多數飼料原料中都含有一種或多種抗營養因子,會嚴重影響畜禽(尤其是單胃動物)對飼料養分的吸收利用。對于抗營養因子的去除,主要的營養手段是向飼料中添加相應的水解酶,使抗營養因子在畜禽消化道中被水解成可消化吸收的小分子成分。體外消化模擬技術可以快速、準確地測定外源酶對飼料中抗營養因子的降解速度和數量。
                                                                                                                                                三、篩選復合酶的最佳組合和適宜用量
                                                                                                                                                由于飼料中抗營養因子的存在和幼齡動物消化道內酶活不足,向飼料中添加酶制劑時,往往是多種酶制劑進行有效配伍。利用體外消化模擬技術可以對復合酶制劑效果進行快速、準確的評價,同時,還可以通過模擬技術,進行復合酶組合篩選和添加劑量確定。
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