Effect of Dietary Supplementation of Full-Fat Canola Seeds on Productive Performance, Blood Metabolites and Antioxidant Status of Laying Japanese Quails

ABSTRACT The present study was carried out to evaluate the effects of dietary supplementation of different levels of full-fat canola seeds (FFCS) on productive performance, blood metabolites and antioxidant status of laying Japanese quails. A total of 360, 8-week-old quails were divided into a completely randomize design with 4 dietary experimental groups and three pens each, each pen containing 30hens. The experimental groups were fed iso-caloric and iso-nitrogenous diets supplemented with FFCS at levels 0, 50, 100 and 150 g/kg diet. The experiment lasted 16 weeks. All supplemented groups showed significant effects in the final body weight (g), hen feed consumption (g/hen/day), egg mass (g egg/hen/day) and hen-day egg production (%). However, egg weight (g) at 8-12 weeks of age reduced significantly. Moreover, feed conversion ratio (g feed/g egg), did not alter among groups. Egg quality criteria were not affected by FFCS supplementationexcept for the egg shape index which decreased significantly at 10 and 15% FFCS groups. Serum total protein, albumen, uric acid, creatinine, hepatic enzyme activities, triiodothyronine, total cholesterol and HDL-cholesterolconcentrations were not altered. However, serum triglycerides and LDL-cholesterol showed significant reduction in all treated groups. Furthermore, serum glutathione peroxidase level was greatly influencedin supplemented groups, while malondialdehyde level reduced significantly. In conclusion, FFCS inclusion in Laying Japanese quail diets up to 15% enhanced the laying performance, blood lipids profile and anti-oxidative status. Thus, it can be regarded as alternative sources of energy and protein in poultry rations.

摘要
本研究旨在评估日粮添加不同水平全脂菜籽（full-fat canola seeds，FFCS）对产蛋日本鹌鹑生产性能、血液代谢物及抗氧化状态的影响。试验共选取360只8周龄鹌鹑，采用完全随机设计分为4个日粮实验组，每组设3个重复栏，每栏饲养30只产蛋母鹌鹑。各实验组饲喂等能等氮日粮，分别添加0、50、100、150 g/kg的FFCS，试验周期为16周。
所有添加组的终末体重（g）、鹌鹑日采食量（g/只·天）、总蛋重（g蛋/只·天）以及日产蛋率（%）均表现出显著差异。但8~12周龄时的蛋重（g）显著降低。此外，料蛋比（g饲料/g蛋）在各组间无显著差异。
蛋品质指标不受FFCS添加的影响，但蛋形指数在添加10%和15% FFCS的实验组中显著降低。
血清总蛋白、白蛋白、尿酸、肌酐、肝酶活性、三碘甲状腺原氨酸、总胆固醇及高密度脂蛋白胆固醇（HDL-cholesterol）浓度均无显著变化。但所有处理组的血清甘油三酯和低密度脂蛋白胆固醇（LDL-cholesterol）浓度均显著降低。此外，各添加组的血清谷胱甘肽过氧化物酶水平显著提升，而丙二醛（malondialdehyde）浓度显著降低。
综上，在产蛋日本鹌鹑日粮中添加最高15%的FFCS，可显著提升其产蛋性能、血脂代谢及抗氧化状态。因此，全脂菜籽可作为家禽日粮中能量与蛋白质的替代来源。