Abstract
Goal. To analyze the influence of replacement of soy with protein sunflower concentrate in the diets for broiler chickens and to evaluate the effect of this ingredient on the growth and development of poultry. Methods. The experiment was conducted on broiler chickens of cross Cobb 500 for fattening from 1-day age to 42-days age. 3 groups of 50 chickens were formed, which were fed with rations where soy components were replaced with protein sunflower concentrate at the levels: 0% (control group), 45% (experimental group 1), and 70% (experimental group 2). Feed consumption and bird death were recorded daily, and the live weight of the bird was monitored weekly. At the end of the experiment, the slaughter qualities of broilers were evaluated. Results. The addition of protein sunflower concentrate to the diets of broiler chickens (crude protein level — 44.4%) did not negatively influence their growth and development, but on the contrary, increased the final live weight by 20.3% (experimental group 2). Replacement of soybeans with this ingredient at the level of 45% (experimental group 1) did not significantly affect feed conversion, live weight dynamics, and slaughter qualities of chickens. Increasing the level of replacement to 70% (experimental group 2) contributed to the improvement of poultry productivity — the average daily increase in live weight exceeded this index in other groups by 19.4–20.9%. The yield of the gutted carcass in the group with 70% soybean substitution for sunflower was 5.5% higher than in the control (without sunflower) and in the experimental group 1 (45% soybean replacement with sunflower) — 73.1%, against 67.6–67.7%. Feed costs per 1 kg of growth in the experimental group 2 were lower by 14.8–15.3% (1.61 kg). The meat productivity index for the diet with a 70% replacement of soy with sunflower protein concentrate was 322.5. Conclusions. Taking into account productivity indicators (increase in live weight and intensity of its growth, improved feed conversion, increased gut carcass yield) and technological efficiency of fattening, it is recommended to replace up to 70% of soy components with protein sunflower concentrate in broiler diets.
Highlights
The main reserve for reducing the cost of feed, and, the cost of livestock products, is the reduction in the cost of the protein component of the diet
One of the leading producers of sunflower meal in Ukraine – the Potoki oil extraction plant (Dnipro), using modern technology for additional mechanical processing of this product, produces high-protein sunflower concentrate, which significantly differs from the original meal in terms of protein and energy nutritional value
In the course of the research, it was found that the safety of the livestock for 42 days in the control and the Experimental 2nd (E2) group was high and amounted to 98%, in the Experimental 1st (E1) group this indicator was 92%
Summary
The main reserve for reducing the cost of feed, and, the cost of livestock products, is the reduction in the cost of the protein component of the diet. One of the leading producers of sunflower meal in Ukraine – the Potoki oil extraction plant (Dnipro), using modern technology for additional mechanical processing of this product, produces high-protein sunflower concentrate, which significantly differs from the original meal in terms of protein and energy nutritional value (the manufacturer declared the level of crude protein – 44.4%, metabolizable energy – 228 kcal/100 g). Taking this into account, sunflower protein is considered all over the world as the main means of enriching the diet of pigs, livestock, and poultry with crude protein [5 – 7]. There is still no consensus on the levels of addition of these products to poultry feed
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