Gregory P C, Miller S J, Brewer A C
Br J Nutr. 1985 Mar;53(2):373-80. doi: 10.1079/bjn19850044.
The relation between the level of food intake and gastrointestinal motility and digesta flow in the abomasum and small intestine was studied in sheep fitted with nichrome-wire electrodes in the gut wall, an abomasal and a duodenal catheter and a terminal ileal cannula. Abomasal volume and outflow were calculated from CrEDTA dilution in six sheep and small intestinal transit time by the passage of Phenol Red in ten sheep. The frequency of the migrating myoelectric complex of the small intestine was not altered by the level of food intake but the duration of the periods of irregular spiking activity, the amplitude of abomasal activity and the frequency of duodenal rushes were decreased as the level of food intake was decreased. There was a linear relation between the level of food intake (FI) and abomasal outflow (mean with SEM: 327 (69) ml/h for each kg FI/d; P less than 0.01), and abomasal volume (mean with SEM: 344 (50) ml/kg FI per d; P less than 0.001), without any significant change in the half-time of marker dilution in the abomasum. Small intestinal transit time decreased with an increase in food intake (mean with SEM: -54.9 (5.6) min/kg FI per d; P less than 0.001). It is concluded that abomasal volume and the rate of digesta flow from the abomasum and along the small intestine are linearly related to the level of food intake.
对安装有肠壁镍铬丝电极、真胃和十二指肠导管以及回肠末端插管的绵羊，研究了采食量与胃肠蠕动以及真胃和小肠内食糜流动之间的关系。通过六只绵羊体内CrEDTA稀释计算真胃容积和流出量，通过十只绵羊体内酚红的通过计算小肠转运时间。小肠移行性肌电复合波的频率不受采食量水平的影响，但随着采食量的降低，不规则尖峰活动期的持续时间、真胃活动的幅度和十二指肠冲动的频率均降低。采食量（FI）与真胃流出量（平均值±标准误：每千克每日采食量为327（69）毫升/小时；P<0.01）以及真胃容积（平均值±标准误：每千克每日采食量为344（50）毫升；P<0.001）之间呈线性关系，真胃内标记物稀释的半衰期无显著变化。小肠转运时间随采食量增加而缩短（平均值±标准误：每千克每日采食量为-54.9（5.6）分钟；P<0.001）。得出的结论是，真胃容积以及食糜从真胃和沿小肠的流动速率与采食量水平呈线性相关。
