Abstract A feeding trial was run to assess the effect of olive cake (OC) in pelleted diets at 0, 10 and 15% with or without 500 FTU/kg diet of a bacterial E. coli phytase (BECP) for broiler chickens during early growth phase period (7–28 days of age). The experimental set up including six treatments as 3 OC levels × 2 supplementations (no enzyme and 500 FTU of BECP). Each treatment was replicated eight times, having five male chickens each. Phytase supplementation significantly increased growth rate and improved production index regardless of the level of OC. Inclusion of OC in broiler diets at 10 and 15% did not significantly affect growth rate, European production index and economic efficiency irrespective of BECP supplementation. In addition, phytase supplementation significantly increased growth rate, European production index and economic efficiency, irrespective of OC level. Plasma cholesterol and triglycerides were decreased considerably due to phytase supplementation to 10 and 15% OC diets. In addition, phytase supplementation significantly increased plasma inorganic phosphorus of broiler fed different levels of OC, and economic efficiency of broilers fed 10% OC, and decreased plasma triglycerides and cholesterol of 10 and 15% OC diets. In conclusion, broiler chickens during early growth stage can be fed pelleted diet contained up to 15% OC with or with BECP supplementation, without adverse effects on growth performance, carcase characteristics, plasma lipid profiles, while phytase supplementation to 10% OC diets yield the highest return over cost and economic efficiency. Highlights This investigation highlights the use of phytase to improve oil cake utilisation in pelleted broiler diets; the essential findings are: • Inclusion of olive cake in broiler diets at 10 and 15% did not significantly affect growth rate, European production index and economic efficiency irrespective of phytase supplementation. • Phytase supplementation significantly improved, growth, European production index, and economic efficiency, regardless of OC level. • Phytase supplementation also markedly increased plasma inorganic phosphorus of broiler fed different levels of OC, and economic efficiency of broilers fed 10% OC, regardless of olive cake level. • Plasma cholesterol and triglycerides were significantly decreased due to phytase supplementation to 10 and 15% olive cake diets. • Phytase supplementation to 10% olive cake diets yields the highest return over cost and economic efficiency

中文翻译：

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植酸酶对提高含有橄榄副产品的肉鸡日粮利用率的影响

摘要 进行了一项饲喂试验，以评估颗粒日粮中橄榄饼 (OC) 在 0、10 和 15% 有或没有 500 FTU/kg 细菌性大肠杆菌植酸酶 (BECP) 的情况下对肉鸡生长早期的影响。阶段（7-28 天）。实验设置包括六种处理，分别为 3 OC 水平 × 2 补充剂（无酶和 500 FTU 的 BECP）。每个处理重复八次，每组有五只雄鸡。无论 OC 水平如何，添加植酸酶都显着提高了生长速度并改善了生产指数。无论是否添加 BECP，在肉鸡日粮中添加 10% 和 15% 的 OC 都不会显着影响生长速度、欧洲生产指数和经济效率。此外，补充植酸酶显着提高了生长速度，欧洲生产指数和经济效率，与 OC 水平无关。由于向 10% 和 15% OC 饮食补充植酸酶，血浆胆固醇和甘油三酯显着降低。此外，添加植酸酶显着提高了饲喂不同OC水平的肉鸡的血浆无机磷和饲喂10% OC的肉鸡的经济效益，并降低了10%和15% OC日粮的血浆甘油三酯和胆固醇。总之，在生长早期的肉鸡可以饲喂含高达 15% OC 的颗粒日粮，添加或添加 BECP，对生长性能、胴体特征、血浆脂质谱没有不利影响，而向 10% OC 日粮添加植酸酶可产生成本和经济效益的最高回报。亮点 本次调查强调了使用植酸酶来提高肉鸡颗粒日粮中油饼的利用率；主要发现是： • 无论是否添加植酸酶，在肉鸡日粮中加入 10% 和 15% 的橄榄饼都不会显着影响生长率、欧洲生产指数和经济效率。• 植酸酶补充剂显着改善生长、欧洲生产指数和经济效率，无论 OC 水平如何。• 植酸酶补充剂还显着提高了饲喂不同 OC 水平的肉鸡的血浆无机磷，以及饲喂 10% OC 的肉鸡的经济效益，无论橄榄饼水平如何。• 由于在 10% 和 15% 橄榄蛋糕日粮中添加植酸酶，血浆胆固醇和甘油三酯显着降低。