Faculdade De Ciências Agrárias E Veterinárias, Universidade Estadual Paulista "Júlio De Mesquita Filho", Jaboticabal, São Paulo, Brazil.
Arch Anim Nutr. 2021 Jun;75(3):222-236. doi: 10.1080/1745039X.2021.1925041. Epub 2021 Jun 21.
Fermentable fibres are used in commercial dog food to promote intestinal health by providing substrates for better metabolic activity of the gut microbiota. Brazil is the world's largest producer of oranges, from which it is possible to obtain fibre with a relevant soluble fraction. The present study compared the effects of two inclusions of orange fibre (1% and 3%, on as fed basis) with a negative control (without addition of fibre source) and two positive controls, beet pulp (3%) and purified inulin (1%), totalling five extruded diets for dogs. The experiment followed a randomised block design with 4 blocks of 10 dogs, 2 dogs per food in each block, totalling 8 dogs per diet. The apparent total tract nutrient digestibility was determined by total faecal collection. Faecal pH and fermentation product content were also measured. The digesta mean retention time (DMRT) was evaluated using plastic markers. The inclusion of a 3% fibre source in diets with 3% orange fibre and beet pulp reduced DM, OM, and energy digestibility ( < 0.05). Diets with 3% orange fibre, beet pulp and 1% inulin presented lower crude protein digestibility than the control ( < 0.05). Dietary fibre digestibility was higher for orange fibre-supplemented diets than inulin ( < 0.05). Beet pulp and 3% orange fibre inclusions resulted in increased moisture content in the faeces of dogs ( < 0.05) but did not alter DMRT. Total short-chain fatty acids were higher than the control in the faeces of dogs fed both orange fibre levels and the beet pulp-supplemented diet ( < 0.05), and the inulin diet-fed dogs presented intermediate values. Butyrate was higher in the faeces of dogs fed the diets supplemented with 1% and 3% orange fibre ( < 0.05), and similar values to the control were observed for beet pulp- and inulin-fed animals. Thus, it was concluded that orange fibre presented higher apparent total tract dietary fibre digestibility than beet pulp and had a fermentation profile in the colon that promoted the generation of butyrate, an effect not observed for inulin and beet pulp.
可发酵纤维被用于商业犬粮中，通过为肠道微生物提供更好的代谢活性底物来促进肠道健康。巴西是世界上最大的橙子生产国，可从中获得具有相关可溶性部分的纤维。本研究比较了两种橙子纤维（1%和 3%，基于实际进食量）的添加物与阴性对照（不添加纤维源）和两个阳性对照（3%的甜菜浆和 1%的纯化菊粉）的效果，共制备了五种膨化犬粮。该实验采用随机分组设计，共 4 组，每组 10 只犬，每组 2 只，每组 8 只犬。通过总粪便收集来确定表观全肠道养分消化率。还测量了粪便 pH 和发酵产物含量。使用塑料标记评估食糜平均滞留时间（DMRT）。在含有 3%纤维源的日粮中添加 3%的橙子纤维和甜菜浆降低了 DM、OM 和能量消化率（<0.05）。含有 3%的橙子纤维、甜菜浆和 1%的菊粉的日粮的粗蛋白消化率低于对照组（<0.05）。添加橙子纤维的日粮的膳食纤维消化率高于菊粉（<0.05）。添加甜菜浆和 3%的橙子纤维增加了犬粪便的水分含量（<0.05），但没有改变 DMRT。粪便中总短链脂肪酸高于对照组，在喂食两种橙子纤维水平和添加甜菜浆的日粮的犬中，菊粉喂养的犬的短链脂肪酸值处于中间水平。丁酸在喂食添加 1%和 3%的橙子纤维的日粮的犬的粪便中含量更高（<0.05），而喂食甜菜浆和菊粉的犬的粪便中丁酸含量与对照组相似。因此，结论是橙子纤维的表观全肠道膳食纤维消化率高于甜菜浆，在结肠中具有发酵特性，可促进丁酸的产生，而菊粉和甜菜浆则没有这种作用。
