蛋白质评价方法在饲料原料营养价值评定中的应用与探讨

饲料原料中蛋白质的质量直接影响着动物的营养吸收与饲料的利用效率，目前对饲料原料蛋白质的评价多采用生物价法，利用蛋白质评分法的研究则很少。因此，作者对现今国际上通用的6种蛋白质营养评价方法进行概述，并以50~75 kg生长猪营养需要量（NRC，2012）为参考蛋白，运用氨基酸评分（AAS）、化学评分（CS）、必需氨基酸指数（EAAI）、必需氨基酸相对比值（EAARR）、氨基酸比值系数分（SRCAA）和模糊评分法（FCM）作为评价标准，对9种常用饲料原料（玉米、小麦、大麦、大豆粕、棉籽粕、菜籽粕、玉米蛋白粉、鱼粉、乳清粉）蛋白质营养价值进行评价，进而得到6种蛋白质营养评价方法在饲料营养价值评定分析中的应用结果。经综合分析探讨，EAARR与FCM对饲料原料蛋白质的评价较其他方法更为科学合理，可为生长猪饲料配方设计提供参考。

Evaluation Methods of Protein and Its Application in Nutritional Value Assessment of Feedstuff

Feedstuff proteins have a directly influence on nutrition and growth of animals.Now,the evaluations of feedstuff protein are mostly based on the methods of biological value,while the study of protein scoring are rare.The authors summarized the six common international methods of protein nutritive value evaluation at present,using the nutritional requirements of 50-75 kg growing pigs(NRC,2012) as reference proteins,applying AAS,CS,EAAI,EAARR,SRCAA and FCM as evaluation criterion to evaluate the nutritional value of 9 common feedstuff (maize,wheat,barley,soybean meal,cottonseed meal,rapeseed dregs,corn gluten meal,fish meal and whey powder) protein.Furthermore,the application results of six protein nutrition evaluation methods in the evaluation and analysis of feed nutrition value were obtained.Through analysis and discussion,which showed that EAARR and FCM were more scientific and reasonable than other methods in protein evaluation,could provide reference for formula design of growing pig feed.