Effect of feeding schedule on apparent energy and amino acid digestibility by growing pigs
Effect of feeding schedule on apparent energy and amino acid digestibility by growing pigs
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DOI：
10.1016/j.anifeedsci.2006.03.012
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发表时间：
2007-01-01
影响因子：
3.2
通讯作者：
Stein, H. H.
中科院分区：
文献类型：
--
作者：
Chastanet, F.;Pahm, A. A.;Stein, H. H.
本试验研究了不同饲养制度对生长猪干物质（DM）、总能（GE）、粗蛋白（CP）和氨基酸（AA）消化率的影响。6只生长中的去势动物（初始体重：40.5 +/- 2.25 kg）在回肠远端配备T型插管，并分配至重复的3 x 3拉丁方设计中，每个正方形中有3只动物和3个阶段。配制基于玉米-大豆粉的饮食（181 g CP/kg）并以三种不同的饲喂方案饲喂给猪;即，每天一餐、每天两餐或自由进食。每天喂一餐或两餐的猪被分配相当于维持能量需求三倍的每日饲料量。在每个阶段从所有猪中采集粪便和回肠样品。计算了DM、GE、CP和AA的回肠表观消化率（CIAD）以及DM和GE的全消化道表观消化率（CTAD）。实验结果表明，三种饲喂方案对DM、GE或任何AA的CIAD均无差异。相比之下，与每天饲喂一次或两次限制量饲料的猪相比，自由采食饲料的猪的DM和GE的CTD 3较低（P < 0.002）。因此，与每天饲喂一次或两次饲料的猪相比，如果从自由采食饲料的猪计算，饲料中的可消化能浓度较低（14.38 MJ/kg vs 14.83 MJ/kg和15.13 MJ/kg）。由此得出结论，饲喂时间表不影响猪DM、GE、CP或AA的CIAD。因此，本实验中使用的三种饲喂方案中的任何一种均可用于旨在测量猪的CIAD的实验中。然而，如果测量DM和GE的CTD 3，则建议猪自由采食。(c)2006 Elsevier B. V.保留所有权利。
An experiment was conducted to investigate the effects of feeding schedule on dry matter (DM), gross energy (GE), crude protein (CP), and amino acid (AA) digestibility by growing pigs. Six growing castrates (initial body weight: 40.5 +/- 2.25 kg) were equipped with a T-cannula in the distal ileum and allotted to a repeated 3 x 3 Latin square design with three animals and three periods in each square. A maize-soybean meal based diet (181 g CP/kg) was formulated and fed to the pigs in three different feeding schedules; i.e., one meal per day, two meals per day, or free access to feed. Pigs fed one or two meals per day were allotted a daily amount of feed equivalent to three times the maintenance energy requirement. Fecal and ileal samples were collected from all pigs in each period. The coefficients of ileal apparent digestibility (CIAD) for DM, GE, CP, and AA were calculated as were the coefficients of total tract apparent digestibility (CTTAD) of DM and GE. Results of the experiment showed that there were no differences in the CIAD for DM, GE, or for any of the AA among the three feeding schedules. In contrast, pigs given free access to the diet had lower (P < 0.002) CTTAD for DM and GE compared with pigs fed a restricted amount of feed either once or twice daily. Therefore, the concentration of digestible energy in the diet was lower if calculated from pigs given free access to the diet compared with pigs fed the diet once or twice daily (14.38 MJ/kg versus 14.83 MJ/kg and 15.13 MJ/kg). It is concluded that the feeding schedule does not influence the CIAD for DM, GE, CP, or AA by pigs. Therefore, any of the three feeding schedules that were used in the current experiment may be used in experiments aimed at measuring CIAD in pigs. However, if the CTTAD of DM and GE are measured, it is recommended that pigs are given free access to feed. (c) 2006 Elsevier B.V. All rights reserved.