Effects of fibre-degrading enzymes in combination with different fibre sources on ileal and total tract nutrient digestibility and fermentation products in pigs
Effects of fibre-degrading enzymes in combination with different fibre sources on ileal and total tract nutrient digestibility and fermentation products in pigs
复制标题
纤维降解酶与不同纤维源组合对猪回肠和全消化道营养物质消化率及发酵产物的影响
DOI：
10.1080/1745039x.2020.1766333
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发表时间：
2020-05-24
影响因子：
2
通讯作者：
Zhang, Shuai
中科院分区：
文献类型：
--
作者：
Zhao, Jinbiao;Zhang, Gang;Zhang, Shuai
本试验研究了复合纤维降解酶（木聚糖酶、纤维素酶和β-葡聚糖酶）对不同纤维素原料猪营养物质消化率、纤维发酵和消化道不同部位短链脂肪酸（SCFA）含量的影响。试验选用36头回肠末端装有T型套管的公猪（初始体重为41.1 ± 2.7 kg），随机分为6组，分别饲喂玉米麸皮、甜菜浆和大豆皮3种不同的高纤维日粮（添加或不添加纤维降解酶）。结果表明，在MB、SBP和SH日粮中添加酶制剂能显著提高日粮总能量（GE）、粗蛋白、干物质（DM）、有机物（OM）、总膳食纤维（TDF）、中性洗涤纤维（NDF）的回肠表观消化率（AID）和GE、DM、OM、TDF、不溶性膳食纤维（IDF）的表观全消化道消化率（ATTD）（p < 0.05）。与SBP和SH饲料相比，MB饲料中GE、DM、灰分、OM和NDF的AID较高（p < 0.05），但后肠消失和营养物质（除乙醚提取物和粗灰分外）的ATTD较低（p< 0.05）。酶补充增加乙酸盐和总SCFA浓度在回肠回肠和粪便的猪。结果表明，添加酶制剂可提高猪整肠内IDF发酵和SCFA浓度，且MB、SH和SBP的纤维组分消化率因其组成不同而存在较大差异。因此，应将纤维降解酶应用于纤维性日粮，以提高猪的生产效率，特别是考虑到高纤维成分的纤维消化率低。
The study was conducted to determine effects of a complex of fibre-degrading enzymes (xylanase, cellulase and beta-glucanase) on nutrient digestibility, fibre fermentation and concentrations of short chain fatty acids (SCFA) at different parts of digestive tract in pigs fed different fibre-rich ingredients. A total of 36 barrows fitted with T-cannulas in the distal ileum (initial body weight of 41.1 +/- 2.7 kg) were randomly allotted to six dietary treatments with three different high-fibre diets including maize bran (MB), sugar beet pulp (SBP) and soybean hulls (SH) with or without supplementation of fibre-degrading enzymes. Enzyme supplementation improved (p < 0.05) apparent ileal digestibility (AID) of dietary gross energy (GE), crude protein, dry matter (DM), organic matter (OM), total dietary fibre (TDF), neutral detergent fibre (NDF) and apparent total tract digestibility (ATTD) of dietary GE, DM, OM, TDF, insoluble dietary fibre (IDF) when pigs were fed MB, SBP or SH diets. When compared to the SBP and SH diets, the AID of GE, DM, ash, OM and NDF in diet MB was higher (p < 0.05), but the hindgut disappearance and ATTD of nutrients, except for ether extract and crude ash, were lower (p< 0.05). Enzyme supplementation increased acetate and total SCFA concentrations in ileal digesta and faeces of pigs. In conclusion, enzyme addition improved IDF fermentation and SCFA concentration in the whole intestine of pigs, and there was a large variation of digestibility of fibre components among MB, SH and SBP owing to their different fibre composition. Therefore, fibre-degrading enzymes should be applied to fibrous diets to improve efficient production of swine, especially considering low fibre digestibility of fibre-rich ingredients.