Son Ah Reum, Son Jeonghyeon, Kim Beob Gyun
Department of Animal Science, Konkuk University, Seoul 05029, Republic of Korea.
Animals (Basel). 2023 Feb 22;13(5):799. doi: 10.3390/ani13050799.
The objectives were to determine the effects of graded inclusion rates of wheat bran (WB) on apparent ileal (AID), apparent total tract (ATTD), and hindgut digestibility of nutrients and tested the influence of ileal digesta collection on proceeding fecal nutrient digestibility in pigs. Six barrows with an initial mean body weight of 70.7 ± 5.7 kg fitted with an ileal T-cannula were used. The animals were assigned to a replicated 3 × 3 Latin square design with three diets and three periods. A basal diet was based mainly on wheat, soybean meal, and cornstarch. Two additional diets were formulated to contain 20 or 40% of WB at the expense of cornstarch. Each experimental period consisted of a seven-day adaptation period and a four-day collection period. After the adaptation period, fecal samples were collected on day 8, and ileal digesta were collected on days 9 and 10. Another set of fecal samples was collected on day 11 to determine the influence of ileal digesta collection on proceeding total tract nutrient digestibility. The AID of energy, dry matter (DM), organic matter (OM), crude protein, and phosphorus linearly decreased ( < 0.05) with an increasing inclusion rate of WB from 0 to 40%. The ATTD of energy, DM, OM, crude protein, ether extract, and phosphorus linearly decreased ( < 0.01) as the inclusion rate of WB increased. Hindgut digestibility of DM, OM, and ether extract linearly increased ( < 0.05) with an increasing inclusion rate of WB. The ATTD of GE and most nutrients did not differ between the two fecal collection periods of before and after ileal digesta collection. Taken together, the inclusion of a fiber-rich ingredient reduced ileal and fecal digestibility of nutrients but increased hindgut digestibility of some nutrients, and total tract digestibility of nutrients did not differ whether the fecal samples were collected before or after two days of ileal digesta collection in pigs.
本研究旨在确定不同添加比例的麦麸（WB）对猪回肠表观消化率（AID）、全肠道表观消化率（ATTD）以及后肠养分消化率的影响，并测试回肠食糜收集对后续粪便养分消化率的影响。选用6头初始平均体重为70.7±5.7 kg且安装了回肠T型插管的公猪。动物被分配到一个重复的3×3拉丁方设计中，有三种日粮和三个阶段。基础日粮主要由小麦、豆粕和玉米淀粉组成。另外两种日粮通过用WB替代玉米淀粉，使其含量分别为20%或40%。每个试验阶段包括7天的适应期和4天的收集期。适应期过后，在第8天收集粪便样本，在第9天和第10天收集回肠食糜。在第11天收集另一组粪便样本，以确定回肠食糜收集对后续全肠道养分消化率的影响。随着WB添加比例从0增加到40%，能量、干物质（DM）、有机物（OM）、粗蛋白和磷的AID呈线性下降（P<0.05）。随着WB添加比例的增加，能量、DM、OM、粗蛋白、乙醚提取物和磷的ATTD呈线性下降（P<0.01）。DM、OM和乙醚提取物的后肠消化率随着WB添加比例的增加呈线性增加（P<0.05）。在回肠食糜收集前后的两个粪便收集期之间，GE和大多数养分的ATTD没有差异。综上所述，添加富含纤维的成分会降低养分的回肠和粪便消化率，但会提高某些养分的后肠消化率，并且在猪回肠食糜收集两天前后收集粪便样本时，养分的全肠道消化率没有差异。
