贵州典型蛋白原料的回肠末端生物学效价评定及减量替代豆粕的适宜性

Bioavailability Evaluation of Guizhou Characteristic Protein Feedstuffs in Terminal Ileum and Adaptability of Soybean Meal Reduction and Replacement

【目的】评定贵州典型蛋白原料在生长猪中的养分生物学效价,为合理利用蛋白原料减量替代猪日粮中豆粕,降低饲料成本提供科学依据。【方法】选取成功完成直肠吻合和十二指肠“T”瘘管手术的试验猪6头,完全随机分成2组,每组3头,每头1个重复,单头单笼饲养,采用活动尼龙袋法评定贵州典型蛋白质饲料原料鱼粉、豆粕、双低菜籽粕、黄豆、普通菜籽粕、DDGS(玉米酒精糟)和棉籽粕的回肠末端生物学效价。【结果】贵州典型蛋白饲料原料鱼粉、豆粕、双低菜籽粕、黄豆、普通菜籽粕、DDGS和棉籽粕的粗蛋白(CP)、有机质(OM)、粗脂肪(EE)、钙(Ca)、磷(P)和粗纤维(CF)常规养分回肠末端表观消化率分别为56.98%~79.81%、64.45%~82.69%、72.83%~87.34%、45.06%~55.65%、53.04%~61.42%和13.02%~19.48%。7种蛋白饲料原料氨基酸的回肠末端表观消化率为51.49%~93.90%,标准消化率为54.36%~96.23%。原料养分CP和EE与回肠末端表观消化率的相关模型分别为y=0.49x+45.05(R^(2)=0.6049)和y=0.855x+72.95(R^(2)=0.8687)。豆粕氨基酸含量与其回肠末端表观和标准消化率的相关模型分别为y=0.0068x+61.60(R^(2)=0.6001)和y=0.0059 x+66.44(R^(2)=0.6532)。【结论】综合成本和氨基酸回肠末端标准消化率,DDGS适合用于猪饲料豆粕减量替代。

【Objective】The nutrient bioavailability of Guizhou characteristic protein feedstuffs in growing pigs was evaluated,which provided the scientific basis for the rational utilization of protein materials reducing or replacing the soybean meal in pig diet and decreasing the feed cost.【Method】Six pigs successfully completed rectal anastomosis and duodenal“T”fistula operation were randomly divided into 2 groups with 3 pigs per group.Each pig was used as a replicate and fed in a single cage.The bioavailability in terminal ileum of seven Guizhou characteristic protein feedstuffs,including fish meal,soybean meal,double low rapeseed meal,soybean,common rapeseed meal,DDGS(distillers dried grains with solubles)and cottonseed meal,was evaluated by mobile nylon bag method.【Result】The CP(crude protein),OM(organic matter),EE(ether extract),Ca,P and CF(crude fiber)apparent digestibility in terminal ileum of seven Guizhou characteristic protein feedstuffs of fish meal,soybean meal,double low rapeseed meal,soybean,common rapeseed meal,DDGS and cottonseed meal were respectively 56.98%-79.81%,64.45%-82.69%,72.83%-87.34%,45.06%-55.65%,53.04%-61.42%and 13.02%-19.48%.The amino acid apparent digestibility in terminal ileum of seven protein feedstuffs ranged from 51.49%to 93.90%,and the standard digestibility ranged from 54.36%to 96.23%.The correlation models of CP and EE with the apparent digestibility in the terminal ileum were y=0.49x+45.05(R^(2)=0.6049)and y=0.855x+72.95(R^(2)=0.8687),respectively.The correlation models of amino acid content in soybean meal with terminal ileum apparent and standard digestibility were y=0.0068x+61.60(R^(2)=0.6001)and y=0.0059x+66.44(R^(2)=0.6532),respectively.【Conclusion】Considering cost and amino acid standard digestibility in ter minal ileum comprehensively,DDGS is suitable for reducing or replacing soybean meal in pig feedstuffs.