State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, 100193, P, R, China.
J Anim Sci Biotechnol. 2013 Apr 15;4(1):17. doi: 10.1186/2049-1891-4-17.
The objective of this study was to investigate the effects of total dietary fiber level on nutrient digestibility and the relationship between apparent total tract digestibility of total dietary fiber, and soluble dietary fiber, insoluble dietary fiber and available energy. Sugar beet pulp was as the only fiber source. The experiment was designed as a 6 × 6 Latin square with an adaptation period of 7 d followed by a 5-d total collection of feces and urine. Feed intake tended to decrease (P =0.10) as total dietary fiber level increased. The apparent total tract digestibility of dry matter, crude protein and gross energy decreased (P <0.01) when total dietary fiber increased but the digestibility of soluble dietary fiber and insoluble dietary fiber increased (P <0.01). The digestible energy and metabolizable energy content of diets decreased (P <0.01) as the total dietary fiber increased.
本研究旨在探讨膳食纤维总量水平对养分消化率的影响，以及膳食纤维的总表观消化率与可溶性膳食纤维、不可溶性膳食纤维和有效能之间的关系。所用的纤维源为糖甜菜粕。试验采用 6×6 拉丁方设计，适应期为 7 d，随后进行为期 5 d 的粪便和尿液全部收集。随着膳食纤维总量的增加，采食量有下降的趋势（P=0.10）。随着膳食纤维总量的增加，干物质、粗蛋白和总能的表观总肠道消化率呈下降趋势（P＜0.01），但可溶性膳食纤维和不溶性膳食纤维的消化率呈上升趋势（P＜0.01）。随着膳食纤维总量的增加，日粮的可消化能和代谢能含量呈下降趋势（P＜0.01）。
