Hens productivity when keeping in cage batteries traditional constructions
DOI:
https://doi.org/10.31548/poultry2020.11-12.010Keywords:
safety of laying hens, feed costs, hens of egg cross, egg production efficiency index, egg-laying intensity, egg weight, egg massAbstract
The productivity of chickens an industrial herd of egg cross “Hy-Line W-36” was investigated when kept for 44 weeks (from 18 to 62 weeks of age) in cage batteries of traditional designs, namely, in 6-tier domestic production (PA “TECHNA”) and 5-tiered from German manufacturers (“Big Dutchman” and “Salmet”). The experiment was conducted in an industrial complex for the production of eggs for laying hens of three groups, each of which was kept in a separate poultry house. In the poultry house for keeping chickens of the 1st group (area 2880.0 m2) the batteries of PA “TECHNA” consisted of 18,360 cages with an area of 0.385 m2. The area of poultry houses for keeping laying hens of the 2nd and 3rd groups was 2202.5 m2. In one of them (2 gr.) “Big Dutchman” batteries contained 9600 cells with an area of 0.372 m2, and in the other (3 gr.) – “Salmet” batteries consisted of 9406 cages with an area of 0.392 m2. When planting 10 laying hens in each cage, the initial density of their content in the 1st group was 26 birds/m2, in the 2nd – 26.9 birds/m2, in the 3rd – 25.5 birds/m2. At the beginning of the experiment, the number of layers in the 1st group (PA “TECHNA”) was 183600 birds, in the 2nd (“Big Dutchman”) – 96000 birds, in the 3rd (“Salmet”) – 94,080 birds. The highest safety at 62 weeks of life and egg production for the initial laying hen were in group 3 (94.9% and 251.4 eggs/birds), less – in group 2 (92.4% and 232.6 eggs/birds, P<0.001), and the smallest – in the 1st (91.8% and 226.3 eggs/birds, P<0.001). From 1 m2 of poultry house area, 14.4 thousand eggs were obtained in group 1, in the second – 10.1 thousand eggs, in the third – 10.7 thousand eggs. Egg mass was obtained, respectively, 940.6; 629.6 and 707.7 kg from 1m2 of poultry house area and 14.8; 14.4 and 16.6 kg per laying hen. Taking into account the costs and volumes of the obtained egg mass, the European index of egg production efficiency in the 1st group was 19.9 units, in the 2nd – 19.4 units, in the 3rd – 22.5 units. The necessity of carrying out one more additional experiment to clarify the efficiency of egg production when keeping layers in cage batteries with the same number of tiers of two manufacturers: the software PA “TEXHA” and “Big Dutchman” has been substantiated.
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