首页> 外文期刊>Journal of Animal Science >Effect of dry- versus wet-autoclaving of spray-dried egg albumen compared with casein as protein sources on apparent nitrogen and energy balance, plasma urea nitrogen and glucose concentrations, and growth performance of neonatal swine
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Effect of dry- versus wet-autoclaving of spray-dried egg albumen compared with casein as protein sources on apparent nitrogen and energy balance, plasma urea nitrogen and glucose concentrations, and growth performance of neonatal swine

机译:喷雾干燥蛋清与酪蛋白相比作为蛋白质来源的干法和湿法高压灭菌对表观氮和能量平衡,血浆尿素氮和葡萄糖浓度以及新生猪生长性能的影响

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摘要

Forty crossbred neonatal pigs with an average initial age of 4 d and BW of 2.16 kg were used in a 28-d experiment to evaluate the nutritional effects of autoclaving a commercial sugar-free, spray-dried egg albumen ( EA) compared with casein. Basal diet protein sources were lactic acid casein and EA. Two more dietary treatments were made by replacing the EA with dry-autoclaved EA (DAEA) or wet-autoclaved EA (WAEA, EA and water mixed in a 1.0:1.2 ratio before autoclaving). The DAEA and WAEA were autoclaved at 121 degrees C and 1.75 kg/cm(2) pressure for 30 min, and WAEA was oven-dried after autoclaving. Analyzed trypsin inhibitor units/mg of EA, DAEA, and WAEA were 535.0, 9.0, and 6.5, respectively. Pigs were fed the diets in gruel form to appetite in individual metabolism cages every 2 h during the experiment. Blood samples were taken on d 7, 14, and 21, and total urine and fecal grab-samples were collected from d 14 to 21 of the experiment. Response criteria were N and energy balance, plasma urea N ( PUN) and glucose concentrations, and growth performance. The WAEA was a higher quality protein source for neonatal pigs than DAEA. Pigs fed the diet containing WAEA absorbed and retained more (P < 0.05) grams of N/d, had higher ( P < 0.05) percentages of N and energy that were absorbed and retained/intake, had lower ( P < 0.05) concentrations of PUN overall, and had higher ( P < 0.05) ADG and G: F than pigs fed the diet containing DAEA. Most response criteria of pigs fed the diets containing DAEA or EA were not different, although pigs fed the diet containing DAEA had lower ( P < 0.05) overall PUN concentrations, and pigs fed the diet containing EA had higher ( P < 0.05) percentages of energy absorbed and retained/intake, and higher ADG and G: F than pigs fed the diet containing DAEA. Growth performance was not different for pigs fed the diets containing WAEA or casein. However, pigs fed the diet containing casein excreted less ( P < 0.05) fecal N, retained more ( P < 0/05) grams of N/d, had higher percentages of N absorbed and retained/intake, and had lower ( P < 0.05) PUN concentrations overall than pigs fed the diet containing WAEA. In conclusion, WAEA was a higher quality protein source for neonatal pigs than DAEA or EA, whereas lactic casein was a higher quality protein source for neonatal pigs than EA, DAEA, or WAEA.
机译:在28天的实验中,使用了40头平均初始年龄为4 d,体重为2.16 kg的杂交猪,以评估与酪蛋白相比,高压灭菌的无糖喷雾干燥蛋清(EA)的营养效果。基础饮食中的蛋白质来源是乳酸酪蛋白和EA。通过用干式高压灭菌的EA(DAEA)或湿式高压灭菌的EA(WAEA,EA和水以1.0:1.2的比例在高压灭菌之前混合)代替EA,进行了另外两种饮食处理。将DAEA和WAEA在121摄氏度和1.75 kg / cm(2)的压力下高压灭菌30分钟,并将WAEA高压灭菌后进行烤箱干燥。胰蛋白酶抑制剂的分析单位/毫克EA,DAEA和WAEA分别为535.0、9.0和6.5。在实验过程中,每2小时给猪喂稀粥形式的饲料,以使其在单独的新陈代谢笼中食欲旺盛。在实验的第7、14和21天采集血样,并在实验的第14到21天采集全部尿液和粪便。响应标准为氮和能量平衡,血浆尿素氮(PUN)和葡萄糖浓度以及生长性能。与DAEA相比,WAEA是新生猪的优质蛋白质来源。饲喂含有WAEA的日粮的猪吸收和保留更多(P <0.05)克N / d,具有更高(P <0.05)的N百分比和被吸收和保留/摄取的能量,具有较低的(P <0.05)浓度。总体而言,PUN比饲喂含DAEA的猪具有更高的(P <0.05)ADG和G:F。饲喂含DAEA或EA的日粮的大多数反应标准没有差异,尽管饲喂含DAEA的日粮的总PUN浓度较低(P <0.05),饲喂含EA的日粮的猪的PUN百分比较高(P <0.05)。吸收和保留/摄入的能量,以及饲喂含DAEA日粮的猪的ADG和G:F较高。饲喂含WAEA或酪蛋白日粮的猪的生长性能没有差异。但是,饲喂含酪蛋白日粮的猪排泄的粪便N较少(P <0.05),保留的N / d较多(P <0/05)克,吸收和保留/摄入的N的百分比较高,而较低(P < 0.05)PUN的总浓度要高于喂食含WAEA日粮的猪。总之,WAEA是比DAEA或EA更高质量的新生猪蛋白质来源,而乳酸酪蛋白是EA,DAEA或WAEA更高品质的新生猪蛋白来源。

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