饲料纤维在生长猪日粮中的消化率。
Digestibility of dietary fiber in distillers coproducts fed to growing pigs.
机构信息
Department of Animal Sciences, University of Illinois, Urbana, Illinois 61801, USA.
出版信息
J Anim Sci. 2010 Jul;88(7):2373-81. doi: 10.2527/jas.2009-2227. Epub 2010 Mar 12.
The objective of this work was to measure the apparent ileal digestibility (AID) and the apparent total tract digestibility (ATTD) of dietary fiber in different sources of distillers dried grains with solubles (DDGS) and to calculate hindgut fermentation of dietary fiber in DDGS fed to growing pigs. Diets, ileal digesta, and fecal samples from pigs fed corn or diets containing 1 of 28 sources of distillers coproducts were analyzed for fiber. Of the 28 sources of coproducts, 24 sources were corn DDGS (C-DDGS), 1 source was sorghum DDGS (S-DDGS), 1 source was DDGS from a blend of sorghum and corn (SC-DDGS), 1 source was C-DDGS from beverage production (DDGS(beverage)), and a source of corn distillers dried grain (DDG) was also included in the experiment. Total dietary fiber (TDF) and DM were analyzed in all DDGS sources, ileal digesta, and fecal samples. Hindgut fermentation was calculated by subtracting values for AID from values for ATTD. In 10 sources of DDGS and in ileal and fecal samples from pigs fed those sources, crude fiber, ADF, NDF, insoluble dietary fiber (IDF), and soluble dietary fiber (SDF) were also determined. Concentrations of CP, ether extract, and ash were also analyzed in these samples, and concentrations of organic residue (OR) were calculated by subtracting the concentration of CP, ether extract, and water from OM. The AID and the ATTD of TDF differed (P < 0.01) among sources of C-DDGS. The average AID of TDF in 10 sources of C-DDGS (21.5%) was not different (P > 0.05) from the AID of TDF in corn (16.5%), but the ATTD and the hindgut fermentation of TDF in the 10 sources of C-DDGS (44.5 and 23.0%, respectively) were greater (P < 0.05) than in corn (23.1 and 6.6%, respectively). The AID of crude fiber, NDF, IDF, SDF, and TDF were not different between C-DDGS and S-DDGS, but the AID of ADF was greater (P < 0.01) in S-DDGS (57.4%) than in C-DDGS (36.8%). The ATTD of OR in S-DDGS (72.5%) and SC-DDGS (68.4%) were less (P < 0.05) than in C-DDGS (77.1%), but the ATTD of ADF, NDF, IDF, SDF, and TDF were not different among the 3 sources of DDGS. The AID, ATTD, and hindgut fermentation of TDF were not different between DDGS from an ethanol plant and DDGS from a beverage plant. The average AID, ATTD, and hindgut fermentation of TDF in the 24 sources of C-DDGS were 23.0, 47.3, and 24.4%, respectively. It is concluded that the AID and ATTD of fiber differ among sources of DDGS and those differences may contribute to differences in the digestibility of energy in DDGS.
本研究旨在测定不同来源的酒糟干物质（DDGS）中膳食纤维的表观回肠消化率（AID）和总肠道消化率（ATTD），并计算生长猪回肠发酵膳食纤维的情况。用玉米或含 28 种不同来源酒糟副产物的日粮饲养猪，分析日粮、回肠食糜和粪便样品中的纤维。在 28 种副产物中，24 种是玉米 DDGS（C-DDGS），1 种是高粱 DDGS（S-DDGS），1 种是高粱和玉米混合的 DDGS（SC-DDGS），1 种是饮料生产用的 C-DDGS（DDGS（饮料）），还包括一种玉米酒糟干物质（DDG）。所有 DDGS 来源、回肠食糜和粪便样品均分析总膳食纤维（TDF）和 DM。通过从 ATTD 中减去 AID 值来计算后肠发酵。在 10 种 DDGS 来源以及用这些来源饲养的猪的回肠和粪便样品中，还测定了粗纤维、ADF、NDF、不溶性膳食纤维（IDF）和可溶性膳食纤维（SDF）。这些样品还分析了 CP、乙醚提取物和灰分的浓度，并通过从 OM 中减去 CP、乙醚提取物和水的浓度来计算有机残渣（OR）的浓度。C-DDGS 来源的 TDF 的 AID 和 ATTD 不同（P <0.01）。10 种 C-DDGS 来源的 TDF 的平均 AID（21.5%）与玉米（16.5%）的 TDF AID 无差异（P >0.05），但 10 种 C-DDGS 来源的 TDF 的 ATTD 和后肠发酵率（分别为 44.5%和 23.0%）均大于玉米（分别为 23.1%和 6.6%）。C-DDGS 和 S-DDGS 之间的粗纤维、NDF、IDF、SDF 和 TDF 的 AID 没有差异，但 S-DDGS（57.4%）的 ADF AID 大于 C-DDGS（36.8%）（P <0.01）。S-DDGS（72.5%）和 SC-DDGS（68.4%）的 OR ATTD 小于 C-DDGS（77.1%）（P <0.05），但 3 种 DDGS 来源的 ADF、NDF、IDF、SDF 和 TDF 的 ATTD 没有差异。乙醇厂和饮料厂生产的 DDGS 的 TDF 的 AID、ATTD 和后肠发酵率没有差异。24 种 C-DDGS 来源的 TDF 的平均 AID、ATTD 和后肠发酵率分别为 23.0%、47.3%和 24.4%。综上所述，DDGS 来源的纤维 AID 和 ATTD 不同，这些差异可能导致 DDGS 中能量消化率的差异。
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