Alert H J, Poppe S, al-Munajed R
Institut für umweltgerechte Tierhaltung, Universität Rostock, Germany.
Arch Tierernahr. 1994;47(2):169-80. doi: 10.1080/17450399409381803.
Two bulls with a permanent rumen fistula and a re-entrant cannula at the duodenum were fed various concentrates and straw (dry matter ration composition: 60% concentrate, 40% straw). Negative correlations were found between the pH value and total fatty acid concentration (r = -0.70). The animals were given the straw one hour before the concentrate. The pH value increased to not more than 7.3 one hour after they had received the straw. It did not drop below 6.4 after the concentrate with any of the rations. The addition of dried sugar beet pulp to the rations leads to a higher mean acetate concentration than the other rations and causes an unvarying high total fatty acid concentration.
两头装有永久性瘤胃瘘管和十二指肠再入式套管的公牛被喂食了各种精饲料和秸秆（干物质日粮组成：60%精饲料，40%秸秆）。发现pH值与总脂肪酸浓度之间存在负相关（r = -0.70）。在给动物喂食精饲料前一小时先给它们喂食秸秆。在它们摄入秸秆一小时后，pH值升高至不超过7.3。在摄入任何一种日粮的精饲料后，pH值都不会降至6.4以下。向日粮中添加干甜菜粕会导致乙酸盐平均浓度高于其他日粮，并使总脂肪酸浓度始终保持在较高水平。
