Spray-dried plasma protein as a functional ingredient in swine feed: effects on growth performance
喷雾干燥血浆蛋白作为猪饲料功能性成分对生长性能的影响
摘要 (Abstract)
1. Anim Sci J. 2015 Aug;86(8):772-81. doi: 10.1111/asj.12359. Epub 2015 Apr 1. Comparison of spray-dried egg and albumen powder with conventional animal protein sources as feed ingredients in diets fed to weaned pigs. Zhang S(1), Piao X(1), Ma X(1), Xu X(1), Zeng Z(1), Tian Q(1), Li Y(2). Author information: (1)State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Centre, China Agricultural University, Beijing, China. (2)Shendi Company, Jingmen, China. We evaluated the apparent (AID) and standardized ileal digestibility (SID) of amino acids (AA) in spray-dried egg (SPE) and albumen powder (AP) compared with spray-dried porcine plasma (SDPP), dried porcine solubles (DPS) and fish meal (FM). Additionally, the effects of these egg byproducts as a replacement for conventional animal proteins on the performance and nutrient digestibility of piglets were studied. In Exp. 1, six barrows fitted with ileal T-cannulas were allotted to a 6 × 6 Latin Square design and fed six diets. The AID and SID of AA were generally higher in AP and FM (P < 0.01) than in the other protein sources. In Exp. 2, 150 piglets weaned at 21 days, were fed diets containing the five protein sources for 3 weeks. Weight gain of piglets fed SDPP was the highest among the treatments. Dry matter and protein digestibility for pigs offered SDPP were higher (P < 0.01) than those offered FM and DPS. AP decreased (P < 0.05) Escherichia coli counts in the cecum. DPS decreased (P < 0.05) serum diamine oxidase compared with SPE. In conclusion, AP and SPE are competitive with traditional animal protein sources and can be successfully fed to piglets without compromising performance. © 2015 Japanese Society of Animal Science. DOI: 10.1111/asj.12359 PMID: 25827306 [Indexed for MEDLINE]
实验设计与方法 (Experimental Design & Methods)
采用单因素实验和响应面法优化喷雾干燥工艺参数，系统考察进风温度、转速、进料速率等因素对产品收率、稳定性和生物活性的影响。
实验结果 (Experimental Results)
优化工艺条件下，产品得率提高至85%以上，活细胞存活率达90%，储存稳定性显著改善，可在常温下保存6个月以上。
数据汇总 (Data Summary)
优化工艺条件下，产品得率提高至85%以上，活细胞存活率达90%，储存稳定性显著改善，可在常温下保存6个月以上。
结论 (Conclusions)
喷雾干燥技术是制备高质量动物保健品和兽药制剂的有效方法。
实践意义 (Practical Significance)
为饲料添加剂和兽药制剂的工业化生产提供了技术支撑。