Huang Bingbing, Shi Huangwei, Wang Li, Wang Lu, Lyu Zhiqian, Hu Qile, Zang Jianjun, Li Defa, Lai Changhua
State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
Animals (Basel). 2021 May 12;11(5):1374. doi: 10.3390/ani11051374.
This study was conducted to determine the effects of low-protein diet prepared with different levels of defatted rice bran (DFRB) and weight stages on growth performance and nutrient digestibility of growing-finishing pigs. The animal experiment included three stages. A total of 240 growing pigs with an initial body weight of 28.06 ± 8.56 kg for stage 1 were allocated to five diets including one control group and four DFRB diets supplemented with 2.5%, 5%, 7.5% and 10% DFRB, respectively. The 192 crossbred pigs with initial body weights of 55.03 ± 7.31 kg and 74.55 ± 9.10 kg were selected for stage 2 and stage 3, respectively. Pigs were allocated to four diets including one control group and three DFRB diets supplemented with 10%, 15% and 20% DFRB, respectively. The results showed that with the increase in DFEB intake, the gain: feed was linearly increased ( < 0.05), and the average daily feed intake tended to linearly decrease ( = 0.06) in stage 1. Except for the apparent total tract digestibility (ATTD) of acid detergent fiber (ADF) in stage 3, levels of DFRB had significant effects on the ATTD of gross energy (GE), dry matter (DM), ash, neutral detergent fiber (NDF) and ADF in three weight stages. In stage 1, with the increase in levels of DFRB, the ATTD of NDF and hemicellulose were firstly increased and then decreased ( < 0.01). In stage 2, with the increasing levels of DFRB, the ATTD of DM, ash and cellulose were firstly increased and then decreased ( < 0.01). In stage 3, the ATTD of GE, DM, ash, NDF and hemicellulose decreased linearly with the increase in levels of DFRB ( < 0.01). Collectively, DFRB could be used as a replacement for corns and soybean meal, and weight stage is important to consider when adjusting the additive proportion.
本研究旨在确定用不同水平的脱脂米糠（DFRB）配制的低蛋白日粮以及体重阶段对生长育肥猪生长性能和养分消化率的影响。动物实验包括三个阶段。第一阶段，将240头初始体重为28.06±8.56千克的生长猪分配到五种日粮中，包括一个对照组和四种分别添加2.5%、5%、7.5%和10% DFRB的DFRB日粮。第二阶段和第三阶段分别选取了192头初始体重为55.03±7.31千克和74.55±9.10千克的杂交猪。猪被分配到四种日粮中，包括一个对照组和三种分别添加10%、15%和20% DFRB的DFRB日粮。结果表明，在第一阶段，随着DFEB摄入量的增加，料重比呈线性增加（P<0.05），平均日采食量呈线性下降趋势（P = 0.06）。除第三阶段酸性洗涤纤维（ADF）的表观全肠道消化率（ATTD）外，DFRB水平对三个体重阶段的总能（GE）、干物质（DM）、灰分、中性洗涤纤维（NDF）和ADF的ATTD均有显著影响。在第一阶段，随着DFRB水平的增加，NDF和半纤维素的ATTD先升高后降低（P<0.01）。在第二阶段，随着DFRB水平的增加，DM、灰分和纤维素的ATTD先升高后降低（P<0.01）。在第三阶段，GE、DM、灰分、NDF和半纤维素的ATTD随DFRB水平的增加呈线性下降（P<0.01）。总体而言，DFRB可替代玉米和豆粕，在调整添加比例时，体重阶段是重要的考虑因素。
