Absorption of dry matter, crude ash, and crude fat in the gastrointestinal tract of bugai at different amounts of soluble protein in the diets

V. Kozyr, V. I. Petrenko, A. Maistrenko, G. G. Dimchya
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Abstract

In red steppe cattle with duodenal and ileocecal anastomoses when fed isoenergetic, isoprotein hay-concentrate rations with different levels of soluble protein (SR), the digestibility of dry matter (SR), crude ash (CW) and crude fat (CW) was studied separately in a complex stomach , small (TnK) and large (TsK) intestinal sections. Different amounts of RchSP in the rations were achieved by feeding grist from natural and roasted peas at a temperature of 105°C. When feeding the experimental ration with a reduced level of RchSP against the background of a decrease in the apparent intensity of digestion, which was manifested in a smaller amount of duodenal and ileocecal chyme, significant changes in the digestibility of SR, SZ and SZ were observed in the postruminal sections of the gastrointestinal tract. According to the general digestibility of SR in the entire alimentary canal and prestomach, in the small and large intestines, there were different directions and degrees of changes in the experimental and control diets. The digestibility of SZ, while being the same in the entire alimentary canal, differed most significantly between rations in the complex stomach and TsK, less so in TnK. On the experimental diet, absorption of dietary fiber in the small and large intestines was 18% lower. The actual level of digestibility of dietary fiber in the animal body did not correspond to the value determined by the formula "feed minus feces" and was 2 times higher in the control diet and 1.4 times higher in the experimental diet. The assimilation of dietary fiber in the studied rations in the alimentary canal had a multidirectional character and, in general, was lower in the experimental ration. The actual digestibility of dietary fiber, compared to the "visible" digestibility of the control diet, was 17% higher, and the experimental diet was 3% lower.
饲粮中不同含量可溶性蛋白质对补鸡胃肠道干物质、粗灰分和粗脂肪的吸收
以十二指肠和回盲吻合的红草原牛为试验对象,饲喂不同水平可溶性蛋白(SR)的等能、等蛋白干草精料日粮,分别研究了复合胃、小肠(TnK)和大肠(TsK)对干物质(SR)、粗灰分(CW)和粗脂肪(CW)的消化率。通过在105℃的温度下饲喂天然豌豆和烤豌豆的谷物,可以获得不同量的RchSP。饲喂RchSP水平降低的试验日粮,在表观消化强度降低的背景下(表现为十二指肠和回盲肠食糜数量减少),胃后部分胃肠道SR、SZ和SZ的消化率发生了显著变化。根据SR在全消化道、胃前、小肠和大肠的总消化率,试验饲粮和对照饲粮有不同方向和程度的变化。SZ的消化率虽然在全消化道内相同,但复合胃饲粮与TsK饲粮差异最显著,TnK饲粮差异较小。在试验饲粮中,小肠和大肠对膳食纤维的吸收量降低了18%。动物体内膳食纤维的实际消化率与“饲料减去粪便”公式所确定的值不符,在对照日粮中高出2倍,在试验日粮中高出1.4倍。饲粮中膳食纤维在消化道的同化具有多向性,总体上低于试验饲粮。与对照日粮的“可见”消化率相比,膳食纤维的实际消化率高17%,实验日粮低3%。
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