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                                                                                                                                              首頁 > 技術與支持 > 分析影響飼料蛋白質消化率的因素
                                                                                                                                              分析影響飼料蛋白質消化率的因素
                                                                                                                                              點擊次數:46 發布時間:2022-10-27
                                                                                                                                                  飼料消化率是指詞料的攝取量與被消化吸收量的百分數,可用消化吸收率或消化率表示。.一般說來,水生動物(魚、蝦等)攝取飼料后,其中只有一部分情養物質被機體消化吸收,另一部分不能利用的以殘渣(糞便)等廢物排出。被水生動物消化的那一部分營養物質稱為可消化的營養物質或稱可消化成分。如蛋白質消化率,即為啁料中蛋白質的攝取量與被消化吸收量(即減去糞中的殘存量)的百分數。而在伺料中,各種營養物質的消化率平均值稱為伺料消化率或稱總消化率。
                                                                                                                                                在大多數詞料中,蛋白質的消化率為75%-90%。如果一種伺料中蛋白質不能被獺兔所利用,就不能說它是一種優質蛋白質伺料。蛋白質的消化受許多因素的影響,如蛋白質種類、纖維素水平、加熱處理、蛋白酶抑制因子等。①蛋白質種類。蛋白質種類不同其消化率不同,如羽毛粉和豆粕,羽毛粉含蛋白質86%,但僅有30%-40%可以被消化;而豆粕的蛋白質含量只有40%-47%,可是其消化率卻達到79%以上。
                                                                                                                                                若僅以蛋白質總量為評價依據,羽毛粉吸引力,但在日糧中大量使用時,會因消化率低而影響獺兔生長。②日糧纖維素水平。秸稈、干草、花生皮等都含有大量的纖維素,當此類飼料在日糧中所占比例過大時,不僅自身難以消化,還會降低蛋白質的消化吸收。一般日糧的粗纖維水平不超過17%為宜。
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