Lee Su A, Ahn Jong Young, Son Ah Reum, Kim Beob Gyun
Department of Animal Science and Technology, Konkuk University, Seoul 05029, Korea.
Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
Asian-Australas J Anim Sci. 2020 Jul;33(7):1148-1155. doi: 10.5713/ajas.19.0449. Epub 2019 Nov 12.
The objective was to determine standardized ileal digestibility (SID) of crude protein (CP) and amino acids (AA) in cereal grains and various co-products fed to growing pigs.
Ten feed ingredients tested were barley (9.3% CP), lupin kernels (31.1% CP), and wheat (11.3% CP) as cereal grains, and 2 sources of corn gluten feed produced in China (21.6% CP) and Korea (24.6% CP), corn gluten meal (65.3% CP), lupin hulls (11.6% CP), rice bran (14.5% CP), soybean meal (44.8% CP), and wheat bran (15.4% CP) as co-products. Ten experimental diets were formulated to contain each ingredient as a sole source of N and an N-free diet was used to correct basal endogenous losses of CP and AA. All diets also contained 0.5% Cr2O3 as an indigestible index. A replicated 11×6 incomplete Latin square design with 11 dietary treatments, 6 periods, and 22 animals was employed. Twenty-two barrows with an initial body weight of 64.6±4.9 kg were equipped with a T-cannula in the distal ileum. An experimental period consisted of a 4-d adaptation period and a 2-d collection period.
The SID of CP in the barley, lupin kernels, wheat, 2 sources of corn gluten feed, corn gluten meal, lupin hulls, rice bran, soybean meal, and wheat bran were 84.7%, 90.5%, 90.4%, 77.4%, 74.6%, 89.5%, 90.4%, 74.4%, 86.9%, and 63.4% (standard error of the mean [SEM] = 5.3, p = 0.006), respectively. The respective SID values of Lys were 75.5%, 88.4%, 83.9%, 74.7%, 62.4%, 80.3%, 83.9%, 78.5%, 88.0%, and 71.2% (SEM = 3.3, p<0.001), and the SID values of Met were 83.6%, 88.7%, 89.4%, 85.7%, 78.3%, 88.9%, 89.4%, 85.3%, 91.1%, and 77.0% (SEM = 2.4, p<0.001), respectively.
The ileal digestibility of protein and amino acids varies among the feed ingredients fed to pigs.
本研究旨在测定生长猪所采食的谷物及各种副产品中粗蛋白（CP）和氨基酸（AA）的标准化回肠消化率（SID）。
所测试的10种饲料原料包括作为谷物的大麦（CP含量9.3%）、羽扇豆仁（CP含量31.1%）和小麦（CP含量11.3%），以及中国生产的2种玉米蛋白粉（CP含量21.6%）、韩国生产的2种玉米蛋白粉（CP含量24.6%）、玉米蛋白粉（CP含量65.3%）、羽扇豆皮（CP含量11.6%）、米糠（CP含量14.5%）、豆粕（CP含量44.8%）和麦麸（CP含量15.4%）作为副产品。配制10种实验日粮，每种日粮含有一种原料作为唯一的氮源，并使用无氮日粮来校正CP和AA的基础内源损失。所有日粮还含有0.5%的三氧化二铬作为不可消化指标。采用重复的11×6不完全拉丁方设计，有11种日粮处理、6个时间段和22头动物。22头初始体重为64.6±4.9 kg的公猪在回肠末端安装了T型套管。一个实验期包括4天的适应期和2天的收集期。
大麦、羽扇豆仁、小麦、2种中国玉米蛋白粉、2种韩国玉米蛋白粉、玉米蛋白粉、羽扇豆皮、米糠、豆粕和麦麸中CP的SID分别为84.7%、90.5%、90.4%、77.4%、74.6%、89.5%、90.4%、74.4%、86.9%和63.4%（平均标准误[SEM]=5.3，p = 0.006）。赖氨酸的相应SID值分别为75.5%、88.4%、83.9%、74.7%、62.4%、80.3%、83.9%、78.5%、88.0%和71.2%（SEM = 3.
