Kaikat Ibtissam, Solà-Oriol David, Pérez José Francisco
Animal Nutrition and Welfare Service (SNiBA), Department of Animal and Food Science, Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Spain.
Animals (Basel). 2024 Dec 10;14(24):3559. doi: 10.3390/ani14243559.
This trial assessed the variability of energy metabolisability in four varieties of barley, rye, and wheat based on changes in energy and nutrient flow estimations in excreta. Twelve diets were created by combining 40% of each cereal variety and 60% of a common mixture, divided into enzyme-supplemented and non-supplemented versions, resulting in 24 experimental diets that included TiO and YbO as indigestible markers. A total of 432 one-day-old broilers were distributed into 72 cages and fed a single diet from day 1 to 15. Experimental runs were conducted from day 16 to 25 using a crossover design. Diets were alternated between enzyme-supplemented and non-supplemented for each cage. Excreta samples were collected on days 20 and 25. Energy metabolisability was highest ( < 0.001) in wheat (83.3%), followed by barley (77.8%) and lowest in rye (70.6%). The variety influenced energy metabolisability in barley and wheat ( < 0.001) at a wider range than predicted by NIR analyses. The variety influenced the increment of energy in response to enzyme supplementation in barley diets ( < 0.05), with varieties having low metabolisability values showing higher responses. TiO and YbO did not differ in estimating nutrient flow. This study quantifies energy variability among and within cereals and identifies potential variation factors.
本试验基于排泄物中能量和养分流量估计值的变化，评估了四种大麦、黑麦和小麦品种的能量代谢率变异性。通过将每种谷物品种的40%与60%的普通混合物混合，创建了12种日粮，分为添加酶和未添加酶的版本，从而得到24种试验日粮，其中包括TiO和YbO作为不可消化标记物。总共432只一日龄肉鸡被分配到72个笼子中，从第1天到第15天饲喂单一日粮。从第16天到第25天采用交叉设计进行试验。每个笼子的日粮在添加酶和未添加酶之间交替。在第20天和第25天收集排泄物样本。小麦的能量代谢率最高（<0.001），为83.3%，其次是大麦（77.8%），黑麦最低（70.6%）。品种对大麦和小麦能量代谢率的影响（<0.001）范围比近红外分析预测的更广。品种对大麦日粮中添加酶后的能量增量有影响（<0.05），代谢率值低的品种反应更高。TiO和YbO在估计养分流量方面没有差异。本研究量化了谷物之间和谷物内部的能量变异性，并确定了潜在的变异因素。
