阿门
肉鸡
木聚糖酶
干物质
低聚糖
中性洗涤纤维
食品科学
开胃菜
化学
饲料转化率
麸皮
析因实验
完全随机设计
阿拉伯木聚糖
动物科学
多糖
生物
体重
生物化学
数学
原材料
统计
有机化学
酶
内分泌学
作者
Azra Simic,Gemma González-Ortiz,Stephen Charles Mansbridge,S.P. Rose,M.R. Bedford,D. Yovchev,V. Pirgozliev
标识
DOI:10.1016/j.psj.2023.103000
摘要
A study was conducted to determine the effect of dietary fiber (DF), xylanase (XYL), xylo-oligosaccharides (XOS), and a combination of XYL and xylo-oligosaccharides (STBIO) on chicken growth performance, N-corrected apparent metabolizable energy (AMEn), and nutrient availability, characteristics of the gastrointestinal tract (GIT) and cecal content of short-chain fatty acids (SCFA). A 35-day experiment was performed on 1,920 as hatched Ross 308 broiler chicks, reared in 96 pens and fed ad libitum. Experimental diets were split into two phases: starter (0-21 d) and finisher (22-35 d). There were two basal diets, first contained 54% maize and in the second, 5% of the maize was replaced by wheat bran as DF. The diets were split into four batches: one of them was used as a control, and each of the others were supplemented either with XYL or XOS or with the STBIO. Each diet was fed to 12 pens following randomization. The data were analyzed in GenStat (20th edition) by ANOVA using a 2 × 4 factorial design. The addition of STBIO improved feed conversion ratio (FCR) and increased weight gain (WG) from 21 to 35 d and from 0 to 35 d (P < 0.05). The inclusion of DF had a negative effect on N and fat retention coefficients at 35 d as well as AMEn and dry matter retention at 21 and 35 d. At 21 d, neutral detergent fiber (NDF) retention was increased when xylanase and STBIO were added to the diet (P < 0.001) and at day 35 the highest retention was noted when the diet was supplemented with DF and XYL or STBIO (P = 0.001). There was no dietary effect on jejunum histomorphometry (P > 0.05). The addition of DF increased the concentration of cecal SCFA in particular valeric and propionic acid at 35 d old birds (P <0.05). It can be concluded that addition of STBIO in diet could provide benefits in terms of fiber degradation, WG and feed efficiency.
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