Strang E J P, Eklund M, Rosenfelder P, Htoo J K, Mosenthin R
J Anim Sci. 2017 Apr;95(4):1614-1625. doi: 10.2527/jas.2016.1238.
The study was conducted to determine the chemical composition, physical characteristics, and standardized ileal digestibility (SID) of CP and AA of 8 currently available genotypes of triticale fed to growing pigs. The genotypes included Grenado, Cando, Agostino, Massimo, Tarzan, HYT Prime, SW Talentro, and Cultivo. Eight barrows with an initial BW of 31 ± 2 kg were fitted with simple T-cannulas at the distal ileum and allotted to an 8 × 8 Latin square design with 8 periods of 7 d each and 8 assay diets. The N-free method was used to determine basal ileal endogenous CP and AA losses. The 8 assay diets contained 1 of 8 triticale genotypes as the sole source of CP and AA. The triticale genotypes were grown under identical environmental conditions on the same site. Among the 8 genotypes, contents of CP ranged from 104.7 to 118.1 g/kg (as-fed basis). The content of total nonstarch polysaccharides and NDF ranged, on an as-fed basis, from 84.6 to 99.5 g/kg and from 88.4 to 149.0 g/kg, respectively. Among the 8 genotypes, SID of CP ranged from 81% in Grenado to 85% in Massimo and Tarzan. The SID of CP and AA did not differ among triticale genotypes except for SID of Arg, Glu, and Gly ( < 0.05). The mean SID of CP, Lys, Met, and Trp was 4, 4, 4, and 1 percantage units less and SID of Trp was 5 percantage units greater compared with values in current feed tables. Among the 8 triticale genotypes, standardized ileal digestible content (cSID) of CP followed total CP content and ranged from 84.8 to 98.7 g/kg (as-fed basis), with the lowest ( < 0.001) values for Grenado and the greatest ( < 0.001) values for SW Talentro and Cultivo. For CP and most AA, cSID linearly decreased as the content of total, soluble, and insoluble β-glucans increased ( < 0.05) in the 8 genotypes of triticale. There was a positive correlation between thousand seed weight and cSID of CP and most AA ( < 0.01). These variables may help to predict cSID in triticale batches, whereas other nutrients are not suitable due to their low variation among the 8 genotypes. The present study provides data on chemical composition, physical characteristics, and SID of CP and AA of 8 triticale genotypes grown under similar conditions. However, as most of the present SID values are less than those in feed tables, future research is warranted to elaborate whether these differences are caused by experimental conditions or reflect a consistent decrease that needs to be accounted for in feed tables.
本研究旨在测定8种目前可获得的小黑麦基因型喂给生长猪时的化学成分、物理特性以及粗蛋白（CP）和氨基酸（AA）的标准回肠消化率（SID）。这些基因型包括Grenado、Cando、Agostino、Massimo、Tarzan、HYT Prime、SW Talentro和Cultivo。8头初始体重为31±2千克的公猪在回肠末端安装了简单的T型套管，并按照8×8拉丁方设计分配，有8个为期7天的时间段和8种试验日粮。采用无氮方法测定基础回肠内源CP和AA损失。8种试验日粮分别包含8种小黑麦基因型中的1种作为CP和AA的唯一来源。这些小黑麦基因型在同一地点相同环境条件下种植。在这8种基因型中，CP含量范围为104.7至118.1克/千克（以风干基础计）。总非淀粉多糖和中性洗涤纤维（NDF）含量，以风干基础计，分别为84.6至99.5克/千克和88.4至149.0克/千克。在这8种基因型中，CP的SID范围从Grenado的81%到Massimo和Tarzan的85%。除了精氨酸（Arg）、谷氨酸（Glu）和甘氨酸（Gly）的SID外，CP和AA的SID在小黑麦基因型之间没有差异（P<0.05）。与当前饲料表中的值相比，CP、赖氨酸（Lys）、蛋氨酸（Met）和色氨酸（Trp）的平均SID分别低4、4、4和1个百分点，而Trp的SID高5个百分点。在8种小黑麦基因型中，CP的标准回肠可消化含量（cSID）随总CP含量变化，范围为84.8至98.7克/千克（以风干基础计），Grenado最低（P<0.001），SW Talentro和Cultivo最高（P<0.001）。对于CP和大多数AA，在8种小黑麦基因型中，随着总β-葡聚糖、可溶性β-葡聚糖和不溶性β-葡聚糖含量增加，cSID呈线性下降（P<0.05）。千粒重与CP和大多数AA的cSID之间存在正相关（P<0.01）。这些变量可能有助于预测小黑麦批次中的cSID，而其他营养素由于在8种基因型中变化较小不适合。本研究提供了在相似条件下种植的8种小黑麦基因型的化学成分、物理特性以及CP和AA的SID数据。然而，由于目前大多数SID值低于饲料表中的值，未来有必要进行研究以阐明这些差异是由实验条件引起的还是反映了饲料表中需要考虑的一致下降情况。
