Abstract
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.
Highlights
Nutrition is one of the major factors impacting the expansion of animal and poultry production, basically due to the constant elevation in prices of conventional dietary ingredients, which leads poultry nutritionists to search for appropriate, cheap and high-quality alternative feedstuffs (Farahat et al, 2013; Abd ElMoneim & Sabic, 2019; Abd El-Moneim et al, 2019)
The obtained results show that, at the end of the experimental period (8wks) the final body weight (g), hen feed consumption (g/ hen/day), overall egg mass (g egg/hen/day) and henday egg production (%) of supplemented groups recorded significant effects in groups supplemented with increasing full-fat canola seeds (FFCS) up to 15 % in the diet compared to the control group
The enhancing effects of FFCS on aforementioned laying performance may be due tothe genetic improvement in traditional Canola seeds (CS), which was developed by scientists in crop plant breeders
Summary
Nutrition is one of the major factors impacting the expansion of animal and poultry production, basically due to the constant elevation in prices of conventional dietary ingredients (yellow corn and soybean), which leads poultry nutritionists to search for appropriate, cheap and high-quality alternative feedstuffs (Farahat et al, 2013; Abd ElMoneim & Sabic, 2019; Abd El-Moneim et al, 2019). Its usage is still restricted due to the low available energy and the presence of detrimental components, just as (glucosinolates, erucic acid , phenols, sinapine, phytic acid, tannins and fiber), which influence its nutritional value and reduced the digestibility of proteins and bioavailability of minerals in the intestine (Mailer et al, 2008; Khajali & Slominski, 2012; Jasinski et al, 2018). For these reasons, Egyptian scientists in crop plant breeders, have successfully employed mutagenesis techniques, using gamma eRBCA-2019-1175. This study aims to evaluate the effects of incorporating increasing levels of FFCS as an alternative feed supplement on productive performance, blood metabolites and antioxidant status of laying Japanese quails
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