Arabinoxylo-oligosaccharides(AXOS) are hydrolytic degradation products of arabinoxylans(AX) that can be fermented by the gut microbiota, thus potentially displaying prebiotic properties. This study examined the effect...Arabinoxylo-oligosaccharides(AXOS) are hydrolytic degradation products of arabinoxylans(AX) that can be fermented by the gut microbiota, thus potentially displaying prebiotic properties. This study examined the effects of AX and AXOS on net energy(NE) and nutrient utilization in broilers. Ross 308 broilers(n = 90, 30 birds per treatment) were fed wheat-soybean diets supplemented with pure AX, AXOS produced by exposing the AX to xylanase in vitro(AXOS), or AX with xylanase(AX + E) from d 10 to 21.Performance parameters were measured from d 10 to 21. On d 15, 10 birds per treatment were allocated to closed-circuit net energy chambers to assess the impact of AX and AXOS on dietary energy utilization,through assessment of both metabolisable energy(ME) and NE. Ileal and caecal digesta samples were collected on d 21 to determine the effect of AX and AXOS on ileal and total tract dry matter digestibility,ileal digestible energy, digesta pH, short chain fatty acids(SCFA) and microbiota concentration. Feed conversion ratio was numerically the lowest in birds fed the diet supplemented with AXOS, which is 1.26 compared to 1.37 and 1.30 for AX and AX + E, respectively. Ileal dry matter digestibility was higher in birds fed AXOS than those fed AX(P = 0.047). Ileal digestible energy and total tract dry matter digestibility were higher in birds fed AXOS than those fed AX or AX + E(P = 0.004 and P = 0.001,respectively). Birds fed AXOS had higher ME intake(P = 0.049) and nitrogen retention(P = 0.001) and a strong trend of higher NE(P = 0.056), NE intake(P = 0.057) and retained energy(P = 0.054) compared to those fed AX. Ileal total SCFA, lactic and formic acid concentrations were higher in birds fed AXOS than those fed AX(P = 0.011, P = 0.012 and P = 0.023, respectively). Birds fed AXOS or AX + E had higher caecal total SCFA, acetic, butyric and isovaleric acid concentrations compared to those fed AX(P = 0.001,P = 0.004, P = 0.016 and P = 0.008, respectively), and caecal propionic acid concentration was higher in birds fed AX + E展开更多
为了探究改善馒头品质的方法,选用两种馒头专用小麦粉,取小麦麸皮阿拉伯木聚糖(AX)分别以0%、0.1%、0.2%、0.3%、0.4%、0.5%加入面粉中混匀,将各混合粉制成馒头,对其质构、色泽、感官进行分析评价。结果表明:向小麦粉中添加适量AX能够...为了探究改善馒头品质的方法,选用两种馒头专用小麦粉,取小麦麸皮阿拉伯木聚糖(AX)分别以0%、0.1%、0.2%、0.3%、0.4%、0.5%加入面粉中混匀,将各混合粉制成馒头,对其质构、色泽、感官进行分析评价。结果表明:向小麦粉中添加适量AX能够降低馒头的硬度和黏性,改善其质构特性,提高馒头质量,降低馒头的白度,加深馒头的黄色程度。两种馒头的比容、结构和弹韧性均呈先增加后减小的趋势,且在添加量为0.2%时达到最优值,1号粉制作的馒头最佳比容为2.32 m L/g,2号粉制作的馒头最佳比容为2.31 m L/g,与对照样相比分别增加了26.09%和20.94%。两种馒头感官评价总分随着AX添加量的增加呈现先上升后下降的趋势,且都在添加量为0.2%时达最高,1号粉制作的馒头感官评价最高为91.0分,2号粉制作的馒头感官评价最高为90.7分。过量添加AX,两种馒头的外观、色泽、粘牙性和气味等评分呈下降趋势、高径比降低、挺度下降、颜色变暗,馒头质量下降。展开更多
文摘Arabinoxylo-oligosaccharides(AXOS) are hydrolytic degradation products of arabinoxylans(AX) that can be fermented by the gut microbiota, thus potentially displaying prebiotic properties. This study examined the effects of AX and AXOS on net energy(NE) and nutrient utilization in broilers. Ross 308 broilers(n = 90, 30 birds per treatment) were fed wheat-soybean diets supplemented with pure AX, AXOS produced by exposing the AX to xylanase in vitro(AXOS), or AX with xylanase(AX + E) from d 10 to 21.Performance parameters were measured from d 10 to 21. On d 15, 10 birds per treatment were allocated to closed-circuit net energy chambers to assess the impact of AX and AXOS on dietary energy utilization,through assessment of both metabolisable energy(ME) and NE. Ileal and caecal digesta samples were collected on d 21 to determine the effect of AX and AXOS on ileal and total tract dry matter digestibility,ileal digestible energy, digesta pH, short chain fatty acids(SCFA) and microbiota concentration. Feed conversion ratio was numerically the lowest in birds fed the diet supplemented with AXOS, which is 1.26 compared to 1.37 and 1.30 for AX and AX + E, respectively. Ileal dry matter digestibility was higher in birds fed AXOS than those fed AX(P = 0.047). Ileal digestible energy and total tract dry matter digestibility were higher in birds fed AXOS than those fed AX or AX + E(P = 0.004 and P = 0.001,respectively). Birds fed AXOS had higher ME intake(P = 0.049) and nitrogen retention(P = 0.001) and a strong trend of higher NE(P = 0.056), NE intake(P = 0.057) and retained energy(P = 0.054) compared to those fed AX. Ileal total SCFA, lactic and formic acid concentrations were higher in birds fed AXOS than those fed AX(P = 0.011, P = 0.012 and P = 0.023, respectively). Birds fed AXOS or AX + E had higher caecal total SCFA, acetic, butyric and isovaleric acid concentrations compared to those fed AX(P = 0.001,P = 0.004, P = 0.016 and P = 0.008, respectively), and caecal propionic acid concentration was higher in birds fed AX + E
文摘为了探究改善馒头品质的方法,选用两种馒头专用小麦粉,取小麦麸皮阿拉伯木聚糖(AX)分别以0%、0.1%、0.2%、0.3%、0.4%、0.5%加入面粉中混匀,将各混合粉制成馒头,对其质构、色泽、感官进行分析评价。结果表明:向小麦粉中添加适量AX能够降低馒头的硬度和黏性,改善其质构特性,提高馒头质量,降低馒头的白度,加深馒头的黄色程度。两种馒头的比容、结构和弹韧性均呈先增加后减小的趋势,且在添加量为0.2%时达到最优值,1号粉制作的馒头最佳比容为2.32 m L/g,2号粉制作的馒头最佳比容为2.31 m L/g,与对照样相比分别增加了26.09%和20.94%。两种馒头感官评价总分随着AX添加量的增加呈现先上升后下降的趋势,且都在添加量为0.2%时达最高,1号粉制作的馒头感官评价最高为91.0分,2号粉制作的馒头感官评价最高为90.7分。过量添加AX,两种馒头的外观、色泽、粘牙性和气味等评分呈下降趋势、高径比降低、挺度下降、颜色变暗,馒头质量下降。
