Department of Animal Science, University of Sao Paulo, Av. Duque de Caxias Norte, 225, Pirassununga 13635-900, Sao Paulo, Brazil.
Universidad Cientifica del Sur, Panamericana Sur, km 19, Lima 42, Lima, Peru.
Animal. 2020 Mar;14(3):499-507. doi: 10.1017/S1751731119002052. Epub 2019 Oct 10.
The digestive system of the weaned piglets can be affected by the type of ingredients present in the diet, and a high fibre content in diets can limit the use of other nutrients and energy. The study was conducted to determine the effects of multicarbohydrase (MC) and phytase (Phy) supplementation on the nutritive value of wheat bran (WB) in weaned piglets. Multicarbohydrase preparation had 700 U α-galactosidase, 2200 U galactomannanase, 3000 U xylanase and 22 000 U β-glucanase per kilogram of diet, and Phy had 500 phytase units - FTU/kg of diet. Twenty-five weaned piglets (6.1 ± 0.63 kg) at 21 days old were fed five diets in a completely randomised experimental design with a 2 × 2 + 1 (0 and 200 mg/kg MC; 0 and 50 mg/kg Phy; and basal diet - BD) factorial arrangement used to determine treatment effects. An additional group of piglets was fed a corn-basal diet during apparent digestibility of nutrients, and fed a 5% casein-corn starch basal diet during apparent and standardised ileal digestibility (SID) of amino acid evaluations. Piglets were individually caged until 38 days old, when Ileal digesta was collected at slaughter. Test diets were made by mixing the basal diets and WB 7 : 3 (w/w), with or without MC, Phy or the combination. There was an interaction trend (P = 0.07) between MC and Phy in the balance of ash, digestible energy (DE) and metabolisable energy (ME). Effects of MC (P < 0.01) on DM, N retention, DE and ME, as well as an effect of Phy (P < 0.05) on ash, DE and ME and a trend in protein digestibility (P = 0.07) also was observed. The enzyme combination showed effect (P < 0.05) on SID of Lys, Pro and Ser; as a trend (P < 0.07) on His, Thr and Val. Isolated, MC also suggested improving (P < 0.07) on SID of His, Lys, Ala (P < 0.05), while Phy improved (P < 0.06) SID of Leu, Lys, Met (P < 0.01), Thr, Val, Ala (P < 0.01), Pro and Ser (P < 0.05). The MC carbohydrate complex was characterised as a viable alternative to increase the apparent nutrients digestibility and SID of amino acids when WB was used in the diet of young pigs and, when combined with Phy, suggested an additive effect on the apparent use of energy.
断奶仔猪的消化系统会受到日粮中成分类型的影响，日粮中高纤维含量会限制其他营养素和能量的利用。本研究旨在确定多聚糖酶（MC）和植酸酶（Phy）添加对断奶仔猪小麦麸（WB）营养价值的影响。多聚糖酶制剂含有 700 U α-半乳糖苷酶、2200 U 半乳甘露聚糖酶、3000 U 木聚糖酶和 22000 U β-葡聚糖酶/千克日粮，植酸酶含有 500 植酸酶单位-FTU/千克日粮。21 天大的 25 头断奶仔猪（6.1 ± 0.63 千克），采用完全随机实验设计，分为 5 种日粮，2×2+1（0 和 200 毫克/千克 MC；0 和 50 毫克/千克 Phy；基础日粮 - BD）因子排列，以确定处理效果。另一组仔猪在表观养分消化率期间用玉米基础日粮喂养，在表观和标准回肠可消化氨基酸评估期间用 5%酪蛋白-玉米淀粉基础日粮喂养。仔猪单独饲养至 38 日龄，屠宰时收集回肠内容物。试验日粮由基础日粮和 WB 7：3（w/w）混合而成，添加或不添加 MC、Phy 或两者的组合。MC 和 Phy 之间存在平衡灰分、可消化能（DE）和代谢能（ME）的趋势（P = 0.07）。MC 对 DM、N 保留、DE 和 ME 有影响（P < 0.01），Phy 对灰分、DE 和 ME 有影响（P < 0.05），蛋白质消化率也有趋势（P = 0.07）。酶组合对 Lys、Pro 和 Ser 的 SID 有影响（P < 0.05）；His、Thr 和 Val 有趋势（P < 0.07）。单独使用 MC 也可以提高 His、Lys、Ala 的 SID（P < 0.05）（P < 0.07），而 Phy 可以提高 Leu、Lys、Met 的 SID（P < 0.01）、Thr、Val、Ala（P < 0.01）、Pro 和 Ser（P < 0.05）。MC 碳水化合物复合物是一种可行的替代物，可以提高断奶仔猪日粮中小麦麸的表观养分消化率和氨基酸 SID，当与 Phy 结合使用时，对能量的表观利用率有相加作用。
