National Institute of Poultry Husbandry, Harper Adams University, Newport, UK.
Agricultural Academy, Agricultural Institute, Shumen, Bulgaria.
Arch Anim Nutr. 2024 Jun;78(3):273-284. doi: 10.1080/1745039X.2024.2404522. Epub 2024 Sep 25.
A study was conducted to investigate the chemical composition and feeding value of rapeseed meal (RSM) batches produced at the same plant when fed to turkey poults. In total, seven RSM samples were obtained from a single manufacturer within a period of 90 days. Although the manufacturer followed the same procedures during oil extraction and RSM production, different batches of rapeseed were used. A balancer feed (BF) was formulated to contain 11.85 MJ/kg ME and 265 g/kg crude protein. Seven nutritionally complete test mash diets were prepared by mixing 200 g/kg of each RSM batch sample with 800 g/kg of the BF, totalling 8 diets. Diets were fed to female B.U.T. Premium turkeys from 12 to 21 d of age. Each diet was fed to six raised floor pens, housing two birds, following randomisation. During the experiment, a nitrogen corrected apparent metabolisable energy (AMEn) assay was performed using a total collection technique. The AMEn in RSM samples was calculated based on the differences between the AMEn values of basal and test diets. Associations were examined between AMEn and the chemical composition of the RSM samples. The overall determined AMEn value of the RSM ranged from 5.50 MJ/kg DM to 8.53 MJ/kg DM, giving an average AMEn of 7.29 MJ/kg DM. There was no difference ( > 0.05) in AMEn content between batches. There was a negative correlation ( = - 0.864; < 0.05) between AMEn values and the neutral detergent fibre (NDF) content of the RSM samples. The results suggest that the NDF could be a good predictor of the AMEn of industry produced RSM. It may be inferred that processing rather than cultivar could be the main factor determining the feeding value of RSM for turkeys.
一项研究调查了同一工厂生产的油菜籽粕（RSM）批次在喂养火鸡雏鸡时的化学成分和饲养价值。在 90 天的时间内，从单一制造商处共获得了 7 个 RSM 样本。尽管制造商在提取油和生产 RSM 时遵循相同的程序，但使用了不同批次的油菜籽。配制了一种平衡饲料（BF），其代谢能（ME）含量为 11.85MJ/kg，粗蛋白含量为 265g/kg。通过将每个 RSM 批次样本的 200g/kg 与 800g/kg 的 BF 混合，制备了 7 种营养完全的测试混合饲料。从 12 到 21 日龄，将这些饲料喂给 B.U.T. Premium 火鸡母雏。每种饲料都喂给 6 个高架地板笼，每个笼中饲养 2 只鸟，随机分配。在实验过程中，使用完全收集技术进行了氮校正表观代谢能（AMEn）测定。根据基础和测试日粮的 AMEn 值之间的差异计算 RSM 样本中的 AMEn。研究了 AMEn 与 RSM 样本化学成分之间的关系。RSM 的总测定 AMEn 值范围为 5.50MJ/kg DM 至 8.53MJ/kg DM，平均 AMEn 值为 7.29MJ/kg DM。批次间 AMEn 含量无差异（>0.05）。RSM 样本的 AMEn 值与中性洗涤纤维（NDF）含量呈负相关（= - 0.864；<0.05）。结果表明，NDF 可能是预测工业生产的 RSM AMEn 的良好指标。可以推断，加工而不是品种可能是决定 RSM 对火鸡饲养价值的主要因素。
