AGE DYNAMICS OF THE MAIN ZOOTECHNICAL INDICATORS FOR THREE TYPES OF MALE BIRDS
Evgeny Petkov
Abstract: The study was conducted in the ES „Poultry“ in IAS-Kostinbrod. In this study were used male chicken cross-breed Cobb-500, slow-growing male chickens from a synthetic population RB and male chicken egg-type cross-breed Lohman-Brown Classic. The main explored parameters in the study were: live weight, feed consumption per kg live weight and per kg of growth, growth rate, growth, mortality and longevity.
The experiment showed that the male chicken Cobb-500, had the highest values of growth, feed consumption and live weight (for each week to 5 week-old). The male chicks egg-type Lohmann-Brown Classic showed lowest values of these parameters. The first five weeks of experiment male birds synthetic population „RB“ have intermediate levels of the same parameters. The same chicken from 6 - to 8-week-old was showed highest values of same parameters.
Consuption of food per kg live weight in first three weeks has lowest values for egg-type cross-breed Lohman-Brown Classic. From the 4th and 5th week-old. Male birds of synthetic population „RB“ in the first five weeks showed the highest value on consumption of feed per kg live weight. Food consumption per kg growth for three types poultry in the first 4-5 weeks of the experiment showed similar values. At the end of the experiment the lowest values showed the Cobb-500 group, followed by the synthetic line ‚RB‘ and the highest values was for layer-type male chickens Lohmann-Brown Classic.
The data to coefficient of variation for live weight at week showed the best uniformity for egg-type male chickens Lohmann-Brown Classic, followed by a Cobb-500 and the lowest was the uniformity of the group showed synthetic line RB.
The highest level of mortality was observed in male chickens RB 5%, followed by fast-growing broilers Cobb-500 with a 4% mortality, and the lowest values showed by male chickens egg-type Lohman-Brown Classic (0% mortality).
The experiment showed that the male chicken Cobb-500, had the highest values of growth, feed consumption and live weight (for each week to 5 week-old). The male chicks egg-type Lohmann-Brown Classic showed lowest values of these parameters. The first five weeks of experiment male birds synthetic population „RB“ have intermediate levels of the same parameters. The same chicken from 6 - to 8-week-old was showed highest values of same parameters.
Consuption of food per kg live weight in first three weeks has lowest values for egg-type cross-breed Lohman-Brown Classic. From the 4th and 5th week-old. Male birds of synthetic population „RB“ in the first five weeks showed the highest value on consumption of feed per kg live weight. Food consumption per kg growth for three types poultry in the first 4-5 weeks of the experiment showed similar values. At the end of the experiment the lowest values showed the Cobb-500 group, followed by the synthetic line ‚RB‘ and the highest values was for layer-type male chickens Lohmann-Brown Classic.
The data to coefficient of variation for live weight at week showed the best uniformity for egg-type male chickens Lohmann-Brown Classic, followed by a Cobb-500 and the lowest was the uniformity of the group showed synthetic line RB.
The highest level of mortality was observed in male chickens RB 5%, followed by fast-growing broilers Cobb-500 with a 4% mortality, and the lowest values showed by male chickens egg-type Lohman-Brown Classic (0% mortality).
Keywords: chicken; cross-breed; Food consumption; growth rate; live weight; slow-growing
Date published: 2023-01-03
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