The research aimed to estimate the production functions of two breeding systems and the preferences between them by analyzing the primary data of the field study sample, a comparative study between the two breeding systems, and estimating the production functions and costs for each system separately. The research found that the average number of chicks in the semi-closed system was about 9 chicks per square meter, while the average number of chicks in the semi-closed system was about 15 chicks per square meter, which demonstrates the high density in this system. It was also shown that the percentage of dead birds at the end of the cycle in the semi-closed system amounted to about 6% of the total chicks, while the percentage of dead ones at the end of the cycle in the average semi-closed system was about 4% of the total chicks, which shows the low percentage of dead ones in the average semi-closed system, and it became clear that the average amount of feed consumed In the semi-closed system, it was about 4.8 kg per chick, while the average amount of feed consumed in the average semi-closed system was about 4.1 kg per chick. The feed conversion efficiency in the semi-closed system was about 60%, while the feed conversion efficiency in the system was about 4.1 kg per chick. the semi-closed system rate is about 74%, which shows the high rate of food conversion, which provides large amounts of feed, which is a major problem these days in terms of their availability and prices. It was also shown that the total costs in the semi-closed system amounted to about 55 pounds per chick, while the costs amounted to the average total revenue in the semi-closed system was about 47.5 pounds per chick. The total revenues in the semi-closed system amounted to about 60 pounds per chick, while the total revenues in the average semi-closed system amounted to about 69.2 pounds per chick.
Studying the difference between the two systems using formal variables shows an increase and superiority of the semi-closed system modified due to the closed system in the density of birds, the percentage of vitality, the average weight of the bird, the rate of production efficiency, and total revenues in pounds, and a decrease in it in each of the total variable costs in pounds, the total costs in pounds, and the amount of feed User for each bird.
It was also shown from the total output function of the modified semi-closed system that the most important production elements that have a significant impact on the total output of one cycle of chicken farms in broiler houses is the amount of feed provided throughout the production cycle, whereas in the semi-closed system it was the amount of feed provided throughout the production cycle and bird density. The cost elasticity for the modified semi-closed system was 0.87, while for the semi-closed system it was 0.99.