本试验旨在评定木薯渣的营养价值及测定木薯渣在鹅中的代谢能和鹅对其营养物质利用率。选取健康、体重接近的60周龄扬州鹅公鹅18只,随机分为3组(试验Ⅰ组、试验Ⅱ组、试验Ⅲ组),每组6个重复,每个重复1只鹅。采用强饲法进行代谢试验,试验Ⅰ组强饲基础饲粮100 g,试验Ⅱ组、试验Ⅲ组分别强饲以木薯渣替代20%和40%基础饲粮的试验饲粮100 g。木薯渣中营养物质的利用率采用二元一次联立方程组法求得。结果表明:1)木薯渣中的总能(GE)以及粗蛋白质(CP)、粗脂肪(EE)、粗纤维(CF)、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)、总磷(TP)、钙(Ca)的含量分别为15.49 MJ/kg、10.47%、1.73%、19.13%、56.12%、45.15%、0.17%、0.50%;木薯渣氨基酸(AA)含量相当丰富,尤其谷氨酸(Glu)的含量高达0.99%。2)木薯渣在鹅中的表观代谢能(AME)、真代谢能(TME)分别为3.73、5.08 MJ/kg;鹅对木薯渣中CP、CF、ADF、NDF、TP、Ca的利用率分别为30.01%、56.31%、77.62%、65.16%、12.58%、14.77%;鹅对木薯渣中AA利用率相对低些,其中精氨酸(Arg)、脯氨酸(Pro)、Glu、半胱氨酸(Cys)、苏氨酸(Thr)、天冬氨酸(Asp)的利用率分别为72.15%、60.80%、58.40%、52.41%、50.04%、48.88%。由此可见,木薯渣纤维含量高,氨基酸含量丰富,可用作鹅饲粮,且鹅对其纤维利用效果较理想。

This experiment was conducted to evaluate the nutritional values of cassava residue and determine metabolizable energy (ME) and major nutrient utilization of cassava residue for geese. Eighteen 60-week-old healthy male Yangzhou geese with similar body weight were randomly divided into 3 groups (group Ⅰ, group Ⅱ, group Ⅲ) with 6 replicates per group and 1 goose per replicate. The method of forced-feeding was used in this metabolism experiment. 100 g basal diet was forced fed in group Ⅰ, and 100 g diet which by substituting 20%, 40% of the basal diet with cassava residue were forced fed in group Ⅱ and group Ⅲ, respectively. Method of quadric equations was used to obtain the utilization of nutrient of cassava residue. The results showed as follows:1) gross energy (GE) and the contents of crude protein (CP), ether extract (EE), crude fiber (CF), neutral detergent fiber (NDF), acid detergent fiber (ADF), total phosphorus (TP), calcium (Ca) of cassava residue were 15.49 MJ/kg, 10.47%, 1.73%, 19.13%, 56.12%, 45.15%, 0.17% and 0.50%, respectively. Contents of amino acid (AA) of cassava residue were very rich, and the content of glutamic (Glu) was up to 0.99%. 2) The apparent metabolizable energy (AME) and true metabolizable energy (TME) of cassava residue were 3.73 and 5.08 MJ/kg, respectively. The utilization of CP, CF, ADF, NDF, TP and Ca of cassava residue were 30.01%,56.31%,77.62%,65.16%,12.58% and 14.77%, respectively. Utilization of AA of cassava residue were relatively low, the utilization of arginine (Arg), proline (Pro), Glu, cysteine (Cys), threonine (Thr) and aspartate (Asp) were 72.15%, 60.80%, 58.40%, 52.41%, 50.04% and 8.88%, respectively. It is concluded that fiber contents cassava residue are higher, AA contents are rich, it can be fed by geese, and fiber in cassava residue can be better used by geese.