Krawielitzki K, Hennig U, Zebrowska T, Kowalczyk J, Herrmann U
Department of Animal Nutrition Oskar Kellner, Academy of Agricultural Sciences, GDR Research Centre of Animal Production Dummerstorf-Rostock.
Arch Tierernahr. 1990 Jan-Feb;40(1-2):17-23. doi: 10.1080/17450399009428377.
An experiment was carried out using pigs weighing approximately 30 kg. The animals were fitted with two re-entrant cannulas in duodenum and ileum. During a 5 day period the passage of digesta through duodenum and ileum as well as the excretion by urine and faeces was estimated, taking an aliquot of 5% for N analysis. Transit of digesta amounted to 12.4 ... 13.2. kg/d in the duodenum and 2.7 ... 3.6 kg/d in the ileum. The appertaining N passage rates were 36.8 ... 42.4 resp. 8.7 ... 11.2 g N/d, corresponding to 108 ... 120% and 27 ... 32% of the N intake. The transit rate of duodenal digesta was highest immediately after feeding (1.4 ... 1.5 kg/h), decreased thereafter strongly, reaching a second lower maximum of 0.85 ... 1.0 kg/h 2 ... 3 h after feeding and then going down to 0.3 ... 0.4 kg/h just before the next feeding. The daily mean value was about 500 g/h. Endogenous N content of duodenal digesta varied between 10% after feeding and 50% 6 ... 12 h after feeding, with an average of 18.1%. In contrast the endogenous N content of ileal digesta was relatively constant amounting about 42% during the whole day. These findings correspond with those found by other authors using other rations and other live weights of the pigs. They refer to a clear diurnal rhythm of digesta transit and to the enormous dynamics of absorption and secretion processes in the intestinal tract of pigs during digestion.(ABSTRACT TRUNCATED AT 250 WORDS)
使用体重约30千克的猪进行了一项实验。给这些动物在十二指肠和回肠安装了两个折返式插管。在5天的时间里，估计了消化物通过十二指肠和回肠的情况以及尿液和粪便的排泄情况，取5%的等分试样进行氮分析。十二指肠中消化物的通过量为12.4……13.2千克/天，回肠中为2.7……3.6千克/天。相应的氮通过率分别为36.8……42.4和8.7……11.2克氮/天，分别相当于氮摄入量的108……120%和27……32%。十二指肠消化物的通过率在喂食后立即最高（1.4……1.5千克/小时），此后大幅下降，在喂食后2……3小时达到第二个较低的最大值0.85……1.0千克/小时，然后在下一次喂食前降至0.3……0.4千克/小时。日平均值约为500克/小时。十二指肠消化物的内源性氮含量在喂食后为10%，在喂食后6……12小时为50%，平均为18.1%。相比之下，回肠消化物的内源性氮含量相对恒定，全天约为42%。这些发现与其他作者使用其他日粮和其他猪体重所发现的结果一致。它们表明消化物通过存在明显的昼夜节律，以及猪在消化过程中肠道吸收和分泌过程的巨大动态变化。（摘要截断于250字）
