Ibrahim Elimam

CHEMICAL COMPOSITION OF MUSCLE AFTER POLLEN APPLICATION IN NUTRITION OF BROILER CHICKENS

Principle purpose of this study was to monitor the chemical composition of breast and thigh muscular part of chickens of hybrid combination Ross 308 and to verify the differences due to use of pollen extract in feed mixture at a dose of 400 and 800 mg.kg -1 during the feeding of 42 days. We did not find significant differences (P≥0.05) in followed chemical compounds of thigh muscle with the skin and subcutaneous fat between the groups with and without application of pollen extract: in contents of water (68.49-70.12 g.100g -1 ), protein (18.82-18.98 g.100g -1 ), fat (9.96-11.53 g.100g -1 ) and in energy value (692.20-752.36 kJ.100g -1 ). Significant differences (P≤0.05) were found only in protein content of breast muscle between the control group (23.96 g.100g -1 ) and experimental group I (23.28 g.100g -1 ). Values of water content (73.97-74.32 g.100g -1 ), fat content (1.07-1.40 g.100g -1 ) and energy (441.65-446.64 kJ.100g -1 ) in breast muscle between the evaluated groups were balanced (P≥0.05). The results show that pollen extract at the concentration used in feed mixture did not effect basic chemical composition of the most valuable parts of the chicken Ross 308 carcass and we can apply it in their nutrition. Application at a dose of 800 mg.kg -1 seems to be more positive.

The effect of propolis extract in the diet of chickens Ross 308 on their performance.

The focus of the study was the performance of Ross 308 chickens after the application of propolis extract in their diet. The nutritional value of feed mixtures for chickens was equal, but the experimental groups were also added propolis extract in the dose of 200 mg.kg-1 (E1), 300 mg.kg-1 (E2) and 400 mg.kg-1 (E3), respectively. The results of the experiments showed that the propolis extract in the examined concentrations can be applied to the diet of chickens, since it managed to raise (P ≥ 0.05) the body weight positively (E1 – 2354.60 g; E2 – 2371.40 g; E3 – 2382.90 g), compared to control group (2272.89 g). Total increase of body weights indicates positive tendency of propolis extract in the diet of chickens Ross 308, because higher values (P ≥ 0.05) were reached in the experimental groups (2311.60 g – E1 to 2339.60 g – E3) compared to control (2230.80 g). Total feed consumption was higher in the experimental groups, on the contrary, FCR was lower (P ≥ 0.05) in the experimental groups (1.64 to 1.67) compared to control (1.69). The best performance results were reached in the group with the greatest addition of propolis extract, i.e. in the dose 400 mg.kg-1 of feed mixtures (E3).