Institute of Animal Sciences, University of Agriculture, Faisalabad-Pakistan 38000.
Department of Poultry Science, PMAS Arid Agriculture University, Rawalpindi-Pakistan 46300.
Poult Sci. 2017 Aug 1;96(8):2736-2742. doi: 10.3382/ps/pex083.
Rapeseed meal (RSM) is a commonly used protein source in poultry diet but its usage is limited due to antinutritional factors, the glucosinolates (GLS) and erucic acid. The 00-rapeseed meal (00-RSM) is the developed variety of rapeseed with reduced GLS and erucic acid content through genetic selection. The present study was conducted with the objective of comparing the standardized ileal digestibility (SID) of amino acids (AA) in 00-RSM and RSM when fed to growing broilers. Three samples of each ingredient were collected from different sources. Two hundred and fifty two day-old male broilers (Hubbard × Hubbard) were fed a corn-soybean meal based starter diet in crumble form from day 1 to 13. On day 14, all chicks were individually weighed and randomly distributed to 42 replicate pens (6 birds in each pen). Six test diets (2 ingredient × 3 samples) with approximately 20% crude protein were made in mash form in such a way that the 6 test ingredients served as the sole source of AA in one diet. The endogenous AAs (EAA) were determined by feeding a nitrogen-free diet to six replicate pens. Each test diet was fed to six replicates of broiler chicks from 14 to 21 days of age. Results indicated that the SID of all AA differed (P < 0.001) among 00-RSM samples. Among RSM samples, the SID of AA varied for arginine, methionine (P < 0.01), histidine, leucine, lysine, aspartic acid, and phenylalanine (P < 0.05). A greater (P < 0.05) SID of all AA except arginine, histidine, phenylalanine, cysteine, and glutamic acid was observed in 00-RSM compared with RSM. In conclusion, 00-RSM had greater SID of AA compared with RSM and it is nutritionally superior to RSM to be used in broiler diets.
菜粕（RSM）是家禽饲料中常用的蛋白质来源，但由于抗营养因子、硫代葡萄糖苷（GLS）和芥酸的存在，其使用受到限制。00-油菜籽粕（00-RSM）是通过遗传选择开发的油菜籽品种，其 GLS 和芥酸含量降低。本研究旨在比较生长肉鸡饲用 00-RSM 和 RSM 时氨基酸（AA）的标准回肠可消化率（SID）。从不同来源收集了每种成分的三个样本。252 只 1 日龄雄性肉鸡（哈伯德×哈伯德）以颗粒形式饲喂玉米-豆粕基础起始日粮，从 1 日龄至 13 日龄。第 14 天，所有雏鸡均单独称重，并随机分配至 42 个重复栏（每个栏 6 只鸡）。以约 20%粗蛋白制成 6 种测试日粮（2 种成分×3 种样本），以将 6 种测试成分作为一种日粮中 AA 的唯一来源。通过饲喂 6 个重复栏的无氮日粮来确定内源性 AA（EAA）。从 14 日龄至 21 日龄，将 6 种测试日粮分别饲喂给 6 个重复栏的肉鸡雏鸡。结果表明，00-RSM 样本中所有 AA 的 SID 均不同（P < 0.001）。在 RSM 样本中，AA 的 SID 因精氨酸、蛋氨酸（P < 0.01）、组氨酸、亮氨酸、赖氨酸、天冬氨酸和苯丙氨酸（P < 0.05）而异。与 RSM 相比，00-RSM 中除精氨酸、组氨酸、苯丙氨酸、半胱氨酸和谷氨酸外，所有 AA 的 SID 均更高（P < 0.05）。综上所述，00-RSM 比 RSM 具有更高的 AA SID，在肉鸡日粮中使用优于 RSM。
