摘要
This study was carried out to determine the chemical composition and in situ degradability of agro-industrial by-products found in Eritrea. Three categories of by-products were evaluated and were the milling industry (wheat bran; WB, short; WS, and middling; WM), brewery (brewers’ dry grain; BDG, hops; BDH, and yeast; BDY) and sesame cakes (sesame cake machine extracted; SCM and manually extracted; SCT). The dry matter (DM) varied between 88.46% in BDY to 92.39% in SCT. The lowest (P < 0.05) crude protein (CP) content was recorded in WM at 10.11% while the highest was from the BDY at 48.20%. The metabolisable energy (ME) value of the agro-industrial by-products ranged from 8.72 to 11.18 MJ per kg DM with the BDH recording the lowest value (P < 0.05). The sesame cakes (SCM and SCT) recorded higher values of 11.17 and 11.18 MJ per kg DM respectively. The SCT recorded the highest ash content at 10.93% followed by BDY at 10.16% with the least being obtained from WM at 2.48%. The ether extract and acid detergent lignin contents were generally low in all cases for all the by-products. Generally, the results indicated that there was no clear pattern in terms of nutrients content amongst the by-products. The in situ DM, organic matter (OM) and CP degradability differed amongst and within the sesame cakes, milling and brewery by-products. The wide variation in chemical composition, DM, OM, CP degradability, and ME obtained from this study offer farmers huge flexibility in formulating rations according to the productive performance of target animals.
摘要译文
本研究进行了以确定厄立特里亚发现的农业工业副产品的化学成分及其原位可降解性。评估了三类副产品，并是铣削工业（小麦麸皮; WB，短; WS，和中间; WM），啤酒厂（酿酒师干谷物; BDG，啤酒花; BDH和酵母; BDY）和芝麻蛋糕（芝麻蛋糕机提取; SCM并手动提取; SCT）。干物质（DM）在SCT中变化为88.46％至92.39％。最低（P <0.05）粗蛋白（CP）含量以效率为10.11％，而最高从BDY为48.20％。农业工业副产品的代谢能量（ME）值从8.72至11.18 mj，每kg DM，BDH记录最低值（P <0.05）。芝麻蛋糕（SCM和SCT）分别记录了较高的11.17和11.18 MJ的值。 SCT以10.93％记录的最高灰分含量，然后是10.16％的BDY，最少从WM获得2.48％。在所有副产物的所有情况下，醚提取物和酸性洗涤剂木质素含量通常很低。通常，结果表明，在副产品之间的营养成分方面没有明确的模式。原位DM，有机物（OM）和CP可降解性在芝麻饼，铣削和啤酒副产品中不同。从本研究中获得的化学成分，DM，OM，CP可降解性和ME的广泛变化为农民提供了根据目标动物的生产性能的制定口粮的巨大灵活性。
Eyob Haile[1]; Francis K. Njonge[2]; Goitom Asgedom[1]; Mathew Gicheha[2*]. Chemical Composition and Nutritive Value of Agro-Industrial By-Products in Ruminant Nutrition[J]. Open Journal of Animal Sciences, 2016,7(1): 8-18