鳙鱼对10种蛋白质饲料原料中营养物质的表观消化率

Apparent Digestibility of 10 Kinds of Feed Ingredients for Bighead Carp (Aristichthys nobilis)

本试验旨在研究鳙鱼(Aristichthys nobilis)对鱼粉(国产)、干酒糟及其可溶物(DDGS)、菜籽粕、米糠、豆粕、酶解羽毛粉、棉籽粕、小麦麸、玉米蛋白粉和花生粕中干物质、粗蛋白质、粗脂肪、总能以及氨基酸的表观消化率。试验饲料按照基础饲料和待测饲料原料7∶3的比例构成,并添加0.5%的三氧化二钇(Y2O3)作为外源指示剂。挑选初体重为(290.02±2.82)g的鳙鱼,随机分成11组,每组3个重复,每个重复10尾鱼。随机选取1组作为对照组投喂基础饲料,剩余10组为试验组分别投喂试验饲料。投喂1周后通过虹吸法收集粪便。结果表明:1)10种饲料原料中干物质、粗蛋白质、粗脂肪和总能的表观消化率的范围分别为69.9%~85.7%、73.5%~88.3%、81.2%~91.1%和81.9%~86.3%。2)在10种饲料原料中,米糠总能的表观消化率最高,而鱼粉的干物质、粗蛋白质和粗脂肪的表观消化率最高;酶解羽毛粉的干物质、粗脂肪和总能的表观消化率最低,玉米蛋白粉的粗蛋白质的表观消化率最低。3)各饲料原料氨基酸的表观消化率基本维持在65.59%~99.17%,且都以小麦麸较低。由此可见,鳙鱼对鱼粉具有很好的利用效果,其次是豆粕和花生粕,而酶解羽毛粉中粗蛋白质的表观消化率最低,小麦麸各氨基酸的表观消化率均比较低。

This experiment was conducted to investigate the apparent digestibility of dry matter（ DM）,crude protein（ CP）,ether extract（ EE）,gross energy（ GE） and amino acids（ AA） in domestic fish meal,distillers dried grains with solubles,rapeseed meal,rice bran,soybean meal,enzyme feather meal,cottonseed meal,wheat bran,corn gluten meal and peanut meal for bighead carp（ Aristichthys nobilis）.The experimental diets were consisted of 70 % basal diet and 30 % test feed ingredients,and added 0.5 % Y2O3 as an exogenous indicator.Bighead carp with an average body weight of（ 290.02 ± 2.82） g were randomly divided into 11 groups with 3 replicates in each group and 10 fish in each replicate.The fish in randomly group were fed a basal diet,and the rest groups were fed one of ten test diets.The fecal samples were collected by instant siphonage method after feeding one week.The results showed as follows： 1） the ranges of apparent digestibility of DM,CP,EE and GE in ten feed ingredients were 69.9 % to 85.7 %,73.5 % to 88.3 %,81.2 % to 91.1 %and 81.9 % to 86.3 %.2） In the ten feed ingredients,the rice bran had the highest apparent digestibility of GE,while the fish meal had the highest apparent digestibility of DM,CP and EE.The lowest apparent digestibility of DM,EE and GE was found in enzyme feather meal,and the apparent digestibility of CP in corn gluten meal was the lowest.3） The apparent digestibility of AA in all feed ingredients remained at 65.59 % to99.17 %,and the wheat bran was lower.It is concluded that fish meal shows the best utilization effects for Bighead carp,followed by peanut meal and soybean meal,while the apparent digestibility of CP in enzyme feather meal is the lowest,the apparent digestibility of AA in wheat bran is lower.