Martinez-Puig Daniel, Pérez José Francisco, Castillo Marisol, Andaluz Anna, Anguita Montserrat, Morales Joaquin, Gasa Josep
Departament de Ciència Animal i dels Aliments, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
J Nutr. 2003 Jan;133(1):134-9. doi: 10.1093/jn/133.1.134.
Male growing pigs were fed a diet containing 250 g/kg of native corn starch (CS; 26% amylose, 74% amylopectin) or 250 g/kg of raw potato starch (RPS), as examples of digestible starch and resistant starch (Type II), respectively. Whole-tract digestibilities of organic matter, crude protein and starch were greater in pigs fed CS than in those fed RPS through at least d 23 of the study. However, the values progressively increased in the RPS-fed pigs up to d 38, at which time the groups did not differ in organic matter and starch digestibility. The digestive tract and colonic digesta were heavier and colon length longer in pigs fed the RPS diet. Digestibility of starch in the ileum on d 38 was significantly lower in RPS-fed pigs, but rose from ileum to rectum; most starch was extensively fermented in the cecum and proximal colon. Purine base (PB) and short-chain fatty acid (SCFA) concentrations in feces initially increased and then decreased beginning on d 4 for PB and on d 21 for SCFA. PB concentration in feces was greater in pigs fed RPS than in those fed CS. In the large bowel digesta, PB and SCFA concentrations increased from the ileum to the cecum and proximal colon and then fell in the distal colon. Pigs fed the RPS diet had a higher PB concentration in the middle colonic digesta and a greater SCFA concentration in the proximal colonic digesta than the CS-fed group. Adaptation of growing pigs to supplementary RPS required 5 wk, as reflected by whole-tract digestibility and PB and SCFA fecal excretion data.
雄性生长猪分别饲喂含有250 g/kg天然玉米淀粉（CS；直链淀粉含量26%，支链淀粉含量74%）或250 g/kg生马铃薯淀粉（RPS）的日粮，分别作为可消化淀粉和抗性淀粉（II型）的示例。在整个研究的至少第23天，饲喂CS的猪的有机物、粗蛋白和淀粉的全肠道消化率高于饲喂RPS的猪。然而，饲喂RPS的猪的这些值在第38天前逐渐增加，此时两组在有机物和淀粉消化率方面没有差异。饲喂RPS日粮的猪的消化道和结肠内容物更重，结肠长度更长。在第38天，饲喂RPS的猪回肠中的淀粉消化率显著较低，但从回肠到直肠有所上升；大部分淀粉在盲肠和近端结肠中被广泛发酵。粪便中的嘌呤碱（PB）和短链脂肪酸（SCFA）浓度最初增加，然后从第4天的PB和第21天的SCFA开始下降。饲喂RPS的猪粪便中的PB浓度高于饲喂CS的猪。在大肠内容物中，PB和SCFA浓度从回肠到盲肠和近端结肠增加，然后在远端结肠下降。与饲喂CS的组相比，饲喂RPS日粮的猪在结肠中段内容物中的PB浓度更高，在近端结肠内容物中的SCFA浓度更高。生长猪对补充RPS的适应需要5周，这由全肠道消化率以及PB和SCFA粪便排泄数据反映出来。
