PDF(Pubmed)
Abstract：
This study aimed to determine the impact of dietary black peppercorn (BP) and xylanase (XYL) alone or in combination on growth performance, dietary energy, nutrient digestibility and blood lipid profile when fed to male Ross 308 broiler chickens from the ages of 7 to 21 d. A wheat-soy-based basal feed that was formulated to be 0.42 MJ lower in metabolizable energy (ME) was mixed. The basal feed was then split into four batches, with the first batch set aside as the basal control; the second batch was supplemented with freshly milled BP; the third batch was supplemented with XYL; the fourth batch was supplemented with both BP and XYL, as in the previous two batches. Each diet was fed to eight pens, with two birds in a pen, following randomization. Feeding BP reduced bird growth and most of the digestibility coefficients but increased blood high-density lipoprotein (p < 0.05). Dietary XYL increased bird growth, dietary ME and nutrient digestibility (p < 0.05). In addition, XYL increased hepatic carotenoids and coenzyme Q10, but reduced blood low-density lipoprotein (p < 0.05). There were no BP by XYL interactions (p > 0.05) observed. Further research is needed to identify the optimum level of BP in broiler diets.
摘要：
本研究旨在确定饮食黑胡椒（BP）和木聚糖酶（XYL）单独或组合对生长性能的影响，膳食能量，当饲喂7至21d龄的雄性Ross308肉鸡时，营养消化率和血脂谱。混合了以小麦大豆为基础的基础饲料，其代谢能（ME）降低了0.42MJ。然后将基础饲料分成四批，第一批作为基础对照；第二批补充新鲜研磨的BP；第三批补充XYL；第四批补充BP和XYL，与前两批一样。每个饮食都喂八支钢笔，有两只鸟在围栏里，在随机化之后。饲喂BP降低了鸟类的生长和大部分消化率系数，但增加了血液中的高密度脂蛋白（p<0.05）。饮食XYL增加了鸟类的生长，饲粮ME和营养物质消化率(p<0.05)。此外,XYL增加肝类胡萝卜素和辅酶Q10，但降低血低密度脂蛋白（p<0.05）。没有观察到通过XYL相互作用的BP(p>0.05)。需要进一步的研究来确定肉鸡日粮中BP的最佳水平。
