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Investigations into the chemical composition and nutritional value of single-cultivar rapeseed meals for broiler chickens
Archives of Animal Nutrition ( IF 2 ) Pub Date : 2021-06-16 , DOI: 10.1080/1745039x.2021.1930455
Emilea Sarah Watts 1 , Stephen Paul Rose 1 , Alexander Mackay Mackenzie 1 , Vasil Radoslavov Pirgozliev 1
Affiliation  

ABSTRACT

A study was conducted to 1) investigate the influence of rapeseed cultivar on the range of variation in the chemical composition and feed value of rapeseed meals (RSM) for broilers and 2) to compare between single-cultivar RSM and a batch of UK-sourced proprietary rapeseed meal. Chemical composition was determined for a total of 10 single-cultivar RSM produced via prepressed solvent-extraction and a proprietary RSM. To investigate RSM digestibility a total of 360 birds were housed, six birds per pen, and between day 13 to 21 of age they received a diet containing per kg 250 g RSM and 750 g basal feed based on wheat and soybean meal. Titaniumdioxide (7 g/kg) was added as an inert marker. For the determination nitrogen-corrected metabolisable energy (AMEn) total excreta and feed intake were quantified over the last 4 d of the experiment. On the final day of the experiment ileal digesta were collected for determination of preceacal crude protein digestibility (pcCPD). With the exception of neutral detergent fibre (NDF), glucosinolates and soluble non-starch polysaccharides the coefficients of variation (CV%) for all major components were similar across all RSM (0.5 < CV% < 0.6). Glucosinolate contents were highest in the 10 single-cultivar RSM whereas NDF levels were greater in the proprietary RSM. Across the 10 single-cultivar RSM there was no significant effect of cultivar on AMEn or pcCPD. Pre-planned orthogonal contrasts indicated that the mean AMEn content and pcCPD of the proprietary RSM was significantly lower than the 10 single-cultivar RSM (p < 0.001). In view of the above, processing rather than cultivar appears to be the main driver of nutritional value in RSM fed to broilers.



中文翻译:

肉鸡单品种菜籽粕化学成分及营养价值调查

摘要

进行了一项研究,以 1) 调查菜籽品种对肉鸡用菜籽粕 (RSM) 的化学成分和饲料价值变化范围的影响,以及 2) 比较单一品种 RSM 和一批英国采购的菜籽粕专有的菜籽粉。确定了通过预压溶剂提取和专有 RSM 生产的总共 10 个单一品种 RSM 的化学成分。为了研究 RSM 的消化率,总共圈养了 360 只鸡,每栏 6 只鸡,在第 13 天到 21 日龄之间,它们接受每公斤含有 250 克 RSM 和 750 克基于小麦和豆粕的基础饲料的饮食。加入二氧化钛 (7 g/kg) 作为惰性标记物。为了测定氮校正代谢能 (AMEn),在实验的最后 4 天对总排泄物和饲料摄入量进行量化。在实验的最后一天,收集回肠食糜用于测定前盲肠粗蛋白消化率 (pcCPD)。除中性洗涤纤维 (NDF)、硫代葡萄糖苷和可溶性非淀粉多糖外,所有主要成分的变异系数 (CV%) 在所有 RSM 中均相似 (0.5 < CV% < 0.6)。硫代葡萄糖苷含量在 10 个单一品种 RSM 中最高,而 NDF 水平在专有 RSM 中更高。在 10 个单一品种 RSM 中,品种对 AMEn 或 pcCPD 没有显着影响。预先计划的正交对比表明,专有 RSM 的平均 AMEn 含量和 pcCPD 显着低于 10 个单一品种 RSM(除中性洗涤纤维 (NDF)、硫代葡萄糖苷和可溶性非淀粉多糖外,所有主要成分的变异系数 (CV%) 在所有 RSM 中均相似 (0.5 < CV% < 0.6)。硫代葡萄糖苷含量在 10 个单一品种 RSM 中最高,而 NDF 水平在专有 RSM 中更高。在 10 个单一品种 RSM 中,品种对 AMEn 或 pcCPD 没有显着影响。预先计划的正交对比表明,专有 RSM 的平均 AMEn 含量和 pcCPD 显着低于 10 个单一品种 RSM(除中性洗涤纤维 (NDF)、硫代葡萄糖苷和可溶性非淀粉多糖外,所有主要成分的变异系数 (CV%) 在所有 RSM 中均相似 (0.5 < CV% < 0.6)。硫代葡萄糖苷含量在 10 个单一品种 RSM 中最高,而 NDF 水平在专有 RSM 中更高。在 10 个单一品种 RSM 中,品种对 AMEn 或 pcCPD 没有显着影响。预先计划的正交对比表明,专有 RSM 的平均 AMEn 含量和 pcCPD 显着低于 10 个单一品种 RSM(硫代葡萄糖苷含量在 10 个单一品种 RSM 中最高,而 NDF 水平在专有 RSM 中更高。在 10 个单一品种 RSM 中,品种对 AMEn 或 pcCPD 没有显着影响。预先计划的正交对比表明,专有 RSM 的平均 AMEn 含量和 pcCPD 显着低于 10 个单一品种 RSM(硫代葡萄糖苷含量在 10 个单一品种 RSM 中最高,而 NDF 水平在专有 RSM 中更高。在 10 个单一品种 RSM 中,品种对 AMEn 或 pcCPD 没有显着影响。预先计划的正交对比表明,专有 RSM 的平均 AMEn 含量和 pcCPD 显着低于 10 个单一品种 RSM(p < 0.001)。鉴于上述情况,加工而不是品种似乎是饲喂肉鸡的 RSM 营养价值的主要驱动因素。

更新日期:2021-06-28
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