玉米脱水酒精糟及其可溶物和维生素 Ｅ水平对肥育猪生长性能、胴体和肉品质的影响

本试验旨在研究饲粮中玉米脱水酒精糟及其可溶物（ＤＤＧＳ）和维生素 Ｅ（ＶＥ）水平对肥育猪生长性能、胴体和肉品质的影响。采用 ３×２两因子完全随机试验设计，设 ３个玉米ＤＤＧＳ水平（０、１５％、３０％）和 ２个维生素 Ｅ水平（１０、２１０ｍｇ／ｋｇ）。选取平均体重为（６０±２）ｋｇ的“杜 ×长 ×大”三元杂交肥育猪 ４８头（公母各占 １／２），按性别、体重随机分为 ６个组，每个组 ８个重复，每个重复 １头猪。试验期为 ４２ｄ。结果表明：１）玉米 ＤＤＧＳ水平对肥育猪平均日增重和料重比无显著影响（Ｐ＞０．０５），对平均日采食量影响极显著（Ｐ＝０．００６），维生素 Ｅ水平及玉米 ＤＤＧＳ和维生素 Ｅ的互作对生长性能无显著影响（Ｐ＞０．０５）；２）玉米 ＤＤＧＳ和维生素Ｅ水平及其互作对胴体重、屠宰率、胴体斜长、背膘厚度、板油率和眼肌面积等胴体品质评定指标影响均不显著（Ｐ＞０．０５），胴体脂肪碘值随饲粮中玉米 ＤＤＧＳ水平的提高而极显著升高（Ｐ＝０．００１）；３）玉米 ＤＤＧＳ水平对肌肉 ｐＨ、肉色、剪切力、滴水损失和大理石评分影响均不显著（Ｐ＞０．０５），饲粮中添加 ２１０ｍｇ／ｋｇ维生素 Ｅ可显著降低肌肉剪切力和滴水损失（Ｐ＜０．０５）。可见，在肥育猪基础饲粮中添加 １５％ ～３０％玉米 ＤＤＧＳ和 ２１０ｍｇ／ｋｇ维生素 Ｅ对其生长性能、胴体和肉品质无显著负影响。

Effects of Dietary Corn Distillers Dried Grains with Solubles and Vitamin E on Growth Performance,Carcass Characteristics and Meat Quality of Finishing Pigs

This experiment was conducted to study the effects of dietary corn distillers dried grains with solubles(DDGS) and vitamin E(VE) on growth performance,carcass characteristics and meat quality of finishing pigs.The experiment was designed in a 3×2 factorial arrangement with three corn DDGS levels(0,15% and 30%) and two VE levels(10 and 210 mg/kg).A total of forty-eight crossbred pigs(Duroc×Landrace×Large) with an average body weight of(60±2) kg were randomly allotted into 6 groups with 8 replicates per group and one pig in each pen.The results showed as follows: 1) different levels of dietary corn DDGS had no significant effects on average daily gain and feed/gain(P>0.05).With the increasing of dietary corn DDGS level,average daily feed intake was decreased significantly(P=0.006).Diets containing VE and the interaction between DDGS and VE level had no significant effects on growth performance(P>0.05).2) There were no significant effects of dietary DDGS,VE,and DDGS×VE on carcass characteristics,including carcass weight,dressing percentage,carcass length,back fat thickness,leaf lard percentage and longissimus muscle area(P>0.05).Iodine value was increased significantly with the increasing of dietary DDGS level(P=0.001).3) Diets containing different levels of corn DDGS had no significant effects on meat quality,such as pH,meat color,shear force,drip loss and marbling score(P>0.05),and high level(210 mg/kg) of VE decreased shear force and drip loss significantly(P<0.05).In conclusion,diets containing 15%~30% corn DDGS and 210 mg/kg VE have no significant negative influence on growth performance,carcass characteristics and meat quality of finishing pigs.