Little information is available abo

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 solventextracted 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.

ผลลัพธ์ (แอฟริกา) 1:

Min inligting beskikbaar oor die voedingswaarde van uitgebreide sojameel, wat geproduseer word deur die uitbreiding van sojabone voor onttrekking van die olie oplosmiddel. Tydens die verwerking, is uitgebrei sojameel onderwerp aan bykomende hitte, wat die konsentrasie van ruminally undegraded proteïen kan verhoog. Verwerking van sojabone met hitte gedurende olie ontginning kan beïnvloed lisien beskikbaarheid deur die verhoging van ruminally undegraded proteïen of benadeel derm vertering. Ons doel was om solvent en uitgebrei sojabone vergelyk met betrekking tot die chemiese samestelling en voedingswaarde vir melkbeeste. Monsters van uitgebreide sojameel (n = 14) en solventextracted sojameel (n = 5) is verkry uit die Volksrepubliek van China gevolge van die uitbreiding proses op voedingswaarde vir melkbeeste te bestudeer. Solvent-onttrek sojameel (n = 2) en meganies geoes (verhit) sojameel (n = 2) van die Verenigde State van Amerika gedien as verwysings vir vergelyking. Monsters is ontleed vir ru vet, lang ketting vetsure, ru-proteïen, aminosure, chemies beskikbaar lysine, in situ ruminale proteïen agteruitgang, en in vitro verteerbaarheid derm. Geen verskille is gevind tussen oplosmiddel geëkstraheer soja etes uit China en uitgebrei soja etes uit China vir ru vet, ru-proteïen, aminosure, of chemies beskikbaar lisien. In situ verdwyning van stikstof, ruminally undegraded proteïeninhoud, en in vitro derm vertering van die ruminally undegraded proteïen was oor die algemeen soortgelyk tussen oplosmiddel geëkstraheer soja etes gemaak in China en uitgebrei soja etes gemaak in China; variasie onder sojabone etes klein was. Resultate dui daarop dat die addisionele hitte van die uitbreiding proses was nie 'n groot genoeg is om die voedingswaarde van sojameel proteïen vir herkouers beïnvloed. Hoewel uitbreiding die olie ontginning proses kan verbeter, is die impak op die gevolglike sojameel is minimaal en nie ag nie nodig wanneer die formulering dieet herkouer.