Author:
Elwakeel Eman A,Titgemeyer Evan C,Cheng Zongjia J,Nour Abdelaziz M,Nasser Mohamed EA
Abstract
Abstract
Little information is available about the nutritive value of expanded soybean meal, which is produced by expansion of soybeans prior to solvent extraction of the oil. During processing, expanded soybean meal is subjected to additional heat, which might increase the concentration of ruminally undegraded protein. Processing of soybeans with heat during oil extraction could affect lysine availability by increasing ruminally undegraded protein or by impairing intestinal digestion. Our objective was to compare solvent and expanded soybeans with regard to chemical composition and nutritive value for dairy cattle. Samples of expanded soybean meal (n = 14) and solvent-extracted soybean meal (n = 5) were obtained from People's Republic of China to study effects of the expansion process on nutritive value for dairy cattle. Solvent-extracted soybean meal (n = 2) and mechanically extracted (heated) soybean meal (n = 2) from the United States served as references for comparison. Samples were analyzed for crude fat, long-chain fatty acids, crude protein, amino acids, chemically available lysine, in situ ruminal protein degradation, and in vitro intestinal digestibility. No differences were found between solvent-extracted soybean meals from China and expanded soybean meals from China for crude fat, crude protein, amino acids, or chemically available lysine. In situ disappearance of nitrogen, ruminally undegraded protein content, and in vitro intestinal digestion of the ruminally undegraded protein were generally similar between solvent-extracted soybean meals made in China and expanded soybean meals made in China; variation among soybean meals was small. Results indicate that the additional heat from the expansion process was not great enough to affect the nutritive value of soybean meal protein for ruminants. Although expansion may improve the oil extraction process, the impact on the resulting soybean meal is minimal and does not require consideration when formulating ruminant diets.
Publisher
Springer Science and Business Media LLC
Subject
Animal Science and Zoology,Biochemistry,Food Science,Biotechnology
Reference28 articles.
1. Schingoethe DJ: Balancing the amino acids needs of the dairy cow. Anim Feed Sci Technol. 1996, 60: 153-160. 10.1016/0377-8401(96)00976-5.
2. Faldet MA, Satter LD, Broderick GA: Determining optimal heat treatment of soybeans by measuring available lysine chemically and biologically with rats to maximize protein utilization by ruminants. J Nutr. 1992, 122: 151-160.
3. Blasi DA, Drouillard J, Titgemeyer EC, Paisley SI, Brouk MJ: Soybean hulls, composition and feeding value for beef and dairy cattle. 2000, Agric Exp Sta, Kansas State Univ, Manhattan, KS, USA, Contribution No. 00-79-E
4. Newkirk R: Soybean: Feed industry guide, 1st edition. Canadian International Grains Institute. 2010, [http://cigi.ca/wp-content/uploads/2011/12/2010-Soybean-Feed-Industry-Guide.pdf]
5. Lusas EW, Watkins LR: Oilseeds: extrusion for solvent extraction. J Am Oil Chem Soc. 1988, 65: 1109-1114.
Cited by
7 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献