摘要
Effect of timing of xylanase supplementation to weanling pigs and its effect on growth performance, nutrient digestibility, and fecal microbiota was investigated. A total of 128 weanling pigs [(Hampshire × Duroc) × (Yorkshire × Landrace); 6.2 ± 0.6 kg body weight (BW); weaning age: 21 d] were assigned to four treatments, with eight replicate pens and four pigs per pen. Treatments were a combination of two dietary treatments (without or with xylanase) in two periods; (period 1, days 0–14) and period 2 (days 14–42): xylanase–xylanase, xylanase–control, control–xylanase, and control–control. Fecal microbiota diversity and apparent total tract digestibility (ATTD) were determined. From days 0–14, pigs had lower (P < 0.01) BW, average daily gain (ADG), and feed efficiency when xylanase was included in the diets. The final BW (P < 0.05) and overall ADG (P < 0.02) at day 42 were greater when xylanase was supplemented from day 14 compared with supplementation from day 0. The apparent ileal digestibility and ATTD of dry matter, gross energy, nitrogen, and phosphorus were increased (P < 0.05) by xylanase. Xylanase significantly decreased (P < 0.05) the relative abundance of Veillonella spp. and tended (P = 0.08) to decrease the relative abundance of Megasphaera spp. in period 2 compared with the non-supplemented group.
摘要译文
研究了木聚糖酶补充对断奶猪的影响及其对生长性能，营养消化率和粪便微生物的影响。共有128只牛民猪[（汉普郡×杜克）×（约克郡×兰德斯）; 6.2±0.6千克体重（BW）;断奶年龄：21 d]被分配到四种治疗方法，每支笔和4只猪。治疗是两次膳食治疗（毫无或与木聚糖酶）的组合; （第1期，第0-14天）和第2期（第14-42天）：木聚糖酶 - 木聚糖酶，木聚糖酶对照，对照 - 木聚糖酶和对照对照。测定粪便微生物群多样性和明显的总介质消化率（ATTD）。从第0-14天，猪的BW较低（P <0.01），平均每日增益（ADG），以及当饮食中包含木聚糖酶时的饲料效率。在第42天的最终BW（P <0.05）和总体ADG（P <0.02），当与第14天相比，与第14天的第14天相比，在第14天的0日0时进行了较大的。干物质的表观髂骨消化率和ATTD，总能量，氮气，二甲苯酶增加（P <0.05）磷酶。木聚糖酶显着降低（P <0.05）Veillonella SPP的相对丰度。并倾向于（p = 0.08），降低兆孢子SPP的相对丰度。与非补充组相比，在第2期。
H. Lu[1]; H. Yan[1]; H.M. Masey O’Neill[2]; C. Bradley[2]; M.R. Bedford[2]; P. Wilcock[2]; C.H. Nakatsu[3]; O. Adeola[1]; K.M. Ajuwon[1;*];. Effect of timing of postweaning xylanase supplementation on growth performance, nutrient digestibility, and fecal microbial composition in weanling pigs[J]. Canadian Journal of Animal Science, 1910,100(1): 27-36