套算法评定鹅的鸭油真代谢能值

Study on True Metabolizable Energy Evaluation of Duck Oil for Goose Using Substitution Method

本文以鸭油为研究对象,探索采用套算法对不同品种鹅真代谢能(TME)值的影响,从而确定鹅的鸭油TME值评定方法。分别选取260日龄健康五龙鹅和青农灰鹅各32只(公),采用2×2×2三因素正交试验设计,2个品种鹅分别采用2种饲喂方式(定量饲喂和直接强饲),饲喂2种饲粮(基础饲粮;基础饲粮+微量元素和维生素),共分为8个处理,每个处理8只鹅。试鹅单笼饲养,每天饲喂100 g,采用全收粪法收集排泄物。试验分2阶段,先饲喂基础饲粮,再饲喂鸭油饲粮,鸭油饲粮用10%的鸭油替代基础饲粮。结果表明:1)五龙鹅和青农灰鹅的鸭油TME值分别为37.79和38.15 MJ/kg;2)品种内4个试验组的TME值,采用定量饲喂并添加微量元素和维生素组最高。3)品种间比较,青农灰鹅对鸭油的TME值显著高于五龙鹅(P<0.05)。综上所述,对鹅的鸭油代谢能值评定时,定量饲喂并添加微量元素和维生素测定的数据稳定性较高;鹅的鸭油TME值为37.79～38.15 MJ/kg;鹅的鸭油饲粮代谢能值品种之间存在差异。

This study took duck oil as the research target to explore the effects of substitution method on true metabolizable energy （TME） of different variety goose, in order to determine the TME evaluation method of duck oil for goose. This experiment adopted a method of 2 x 2 x 2 three factors random design, thirty two healthy 260-day-old Wulong geese and Qingnonghui geese were selected, each breed was divided into 2 treatments （ precise feeding and forced feeding） and each treatment was fed two kinds of diets （ basal diet and basal diet ＋ trace elements and vitamin） with 8 replicates in each treatment. The experimental geese were raised exclusively in divided cage and fed 100 g feedstuffs per day, and total feces collection was adopted each day. This trial was divided into two stages. The first stage was fed a basal diet and the second stage was fed a duck oil diet which substituted the basal diet with 10% duck oil. The results showed as follows： 1 ） the TME of duck oil for Wulong geese and Qingnonghui geese was 37.79 and 38.15 MJ/kg, respectively. 2 ） The TME of duck oil in precise feeding with trace elements and vitamin group was the highest among the 4 treatments of the same breed. 3 ） The TME of duck oil for Qingnonghui goose was significant higher than that of Wulong goose between two breeds （P 〈 0.05 ）. The experiment showed that for the TME evaluation for duck oil of goose, the method of precise feeding with trace elements and vitamin can achieve high stability of data. The TME of duck oil for goose was between 37.79 and 38.15 MJ/kg. There are differences between two goose breeds with regard to the TME of duck oil.