College of Animal Science and Technology, Hunan Agriculture University, Changsha 410128, China.
International Department of Yali High School, Hunan Province, Changsha 410100, China.
Poult Sci. 2021 Apr;100(4):100972. doi: 10.1016/j.psj.2020.12.069. Epub 2020 Dec 29.
The objective of this study was to determine the ileal digestible energy (IDE), ME, and ME of rice, broken rice, and rice bran. The birds were fed a standard starter diet from day 0 to 14 and experimental diets from day 15 to 21 after hatching. A total of 336 birds were grouped by BW and assigned to 7 diets, each diet comprised 8 replicates with 6 birds per replicate. The diets comprised a reference diet (RD) and 6 test diets (TD). The TD contained 2 levels of rice, broken rice or rice bran that partly replaced the energy sources in the RD at 120 or 240 g/kg (rice and broken rice) or 150 or 300 g/kg (rice bran). Addition of rice or broken rice to RD linearly increased (P < 0.01) ileal digestibility of DM, energy, as well as total tract metabolizability of DM, energy, and N-corrected energy in the TD. The inclusion of rice bran in the TD linearly decreased (P < 0.01) energy digestibility and utilization in the test diet. Regressions of rice-associated, broken rice-associated, or rice bran-associated IDE, ME, or ME intake in kcal against rice, broken rice, or rice bran intake were as follows: IDE = Y = 2 (6) + 3,185 (73) × Rice + 3,199 (72) × Broken Rice + 2,562 (61) × Rice Bran, r2 = 0.98; ME = Y = 8 (6) + 3,103 (72) × Rice + 3,190 (71) × Broken Rice + 2,709 (60) × Rice Bran, r2 = 0.98; ME = Y = 4 (5) + 3,014 (68) × Rice + 3,092 (101) × Broken Rice + 2,624 (57) × Rice Bran, r2 = 0.98; Based on the regression equations, the IDE, ME, ME values (kcal/kg of DM) of rice were 3,185, 3,103 and 3,014, respectively, while for broken rice, the values were 3,199, 3,190, and 3,092 and for rice bran, the values were 2,562, 2,709, and 2,624, respectively.
本研究旨在确定大米、碎米和米糠的回肠可消化能（IDE）、代谢能（ME）和 ME。从孵化后第 0 天到第 14 天，雏鸡饲喂标准起始日粮，第 15 天到第 21 天饲喂试验日粮。336 只雏鸡按体重分组，分配到 7 种日粮中，每种日粮包含 8 个重复，每个重复有 6 只鸡。日粮包括参考日粮（RD）和 6 种试验日粮（TD）。TD 含有 2 个水平的大米、碎米或米糠，以 120 或 240 g/kg（大米和碎米）或 150 或 300 g/kg（米糠）部分替代 RD 中的能量来源。RD 中添加大米或碎米可线性提高（P < 0.01）TD 中 DM、能量的回肠消化率以及 DM、能量和 N 校正能量在整个肠道中的代谢率。TD 中添加米糠可线性降低（P < 0.01）试验日粮中能量的消化率和利用率。大米相关、碎米相关或米糠相关 IDE、ME 或 ME 摄入量与大米、碎米或米糠摄入量的回归方程如下：IDE = Y = 2（6）+ 3,185（73）× 大米+ 3,199（72）× 碎米+ 2,562（61）× 米糠，r2 = 0.98；ME = Y = 8（6）+ 3,103（72）× 大米+ 3,190（71）× 碎米+ 2,709（60）× 米糠，r2 = 0.98；ME = Y = 4（5）+ 3,014（68）× 大米+ 3,092（101）× 碎米+ 2,624（57）× 米糠，r2 = 0.98；根据回归方程，大米的 IDE、ME、ME 值（DM 每千克的千卡数）分别为 3,185、3,103 和 3,014，碎米的相应值分别为 3,199、3,190 和 3,092，米糠的相应值分别为 2,562、2,709 和 2,624。
