Published in Scientific Papers. Series D. Animal Science, Vol. LX
Written by Svetlana GRIGOROVA, Sabka SURDJIISKA, Natasha GJORGOVSKA
The objective of this scientific paper is to establish the chemical composition and the nutritive value of a high-protein rapeseed feed produced in Bulgaria, and to study the possibilities for replacing soybean meal with this product in the diet of Japanese quails. Chemical composition of the tested product was determined, and the following results regarding its contents were obtained: crude protein – 42.50%, crude fibers – 8.50%, crude fats – 3.50%, lysine – 2.24%, methyonine – 0.85%, tryptophan – 0.51%, threonine – 1.81%, glucosinolates – 11.2 μmol/g. An experiment was performed with a total of 200 female Japanese quails from Pharaoh breed, 8 weeks old, randomly divided in four groups – a control and three experimental groups, 50 quails in each. The poultry from the control group received diet with soybean meal as the basic protein component, while in the experimental groups a part of the soybean meal was substituted with 5%, 10% and 15% of the tested product (for experimental groups I, II and III, respectively). All diets were equal by their nutritional value. During the experiment the feed consumption, laying capacity and health condition were monitored every day. Eggs morphological characteristics and their taste were controlled periodical. In experimental groups I and II, where 5% and 10%, respectively, of high-protein rapeseed product was included in the quail’s diets, laying capacity and laying intensity were significantly higher than in the control group (P<0.05). The addition of 5%, 10% or 15% of the tested product didn’t have negative influence on the egg weight, the eggshell strength, the yolk or the albumen colour, or the boiled eggs’ taste and smell. The examined diets with inclusion of 5%, 10% and 15% of high-protein rapeseed product, according to the results obtained in this experiment, are recommendable for use in the practice.
[Read full article] [Citation]
