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                                                                                                                                              首頁 > 新聞中心 > 為什么說飼料消化率不等于利用率
                                                                                                                                              為什么說飼料消化率不等于利用率
                                                                                                                                              點擊次數:1019 發布時間:2019-12-20
                                                                                                                                               
                                                                                                                                                植物原料的主要成分消化率和必需氨基酸消化率的對標發現,必需氨基酸消化率很高,脂肪和總糖消化率較低。這個研究涉及到了很多原料和品種,過程中發現了很多問題,不同種實驗的特定原料消化率差異巨大,甚至在不同研究同一個實驗,原料消化率的估計值變異性很大。但這并不是魚品種問題,而是原料的問題,飼料廠的配方師根據這個數據庫和表觀消化率配置飼料時,不同的方案成本差異可能會達到10%。用蛋白和脂肪表觀消化率的能值計算出來的數據和直接計算相差很大,表觀消化率并不代表生物可利用率。測試表觀消化率是通過測試魚糞便,在糞便中減少了,但是這只能說明該營養物質消失了,并不能說明一定被利用了。同一種氨基酸,來源不同,其表觀消化率也有可能不同?;啬c中標準消化率和生物可利用率是不一樣的。
                                                                                                                                                蛋白消化率和氨基酸生物可利用率究竟是由什么決定的,品種或者處理過的養殖環境?原料的處理和加工工藝的影響不可忽視血粉四種不同烘干方式,后的蛋白差異巨大,菜籽粕加熱過程中之后避免酸敗、降低抗營養因子、降低濕物質。蛋白原料存在加工不足和過度加工的問題,如何平衡這個工藝是很重要的,賴氨酸在高溫加熱15分鐘和30分鐘過程中,表觀消化率是不斷降低的。而且生物可利用率在過度加熱之后也變低了。所以說加工過程對表觀消化率的影響特別巨大。”
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