PRODUCTIVE QUALITIES OF HENS OF A PARENTAL FLOCK OF BROILERS AGAINST THE BACKGROUND OF IMMUNOCORRECTION OF ORGANISM
Biological preparation Prevention-N-C has been developed and scientific and practical justification of its expediency in comparison with previously tested preparation PS-7 for realization of biological resource potential of productive qualities of hens of parent herd of Hubbard F-15 cross broilers due to activation of non-specific resistance of organism. Tested biopreparations increase the egg content of chickens, which manifests itself in its intense growth during the initial period of productivity and earlier reaching the peak of egg content. The egg intensity of chickens 1st (56.79 ± 0.70%) and 2nd (57.61 ± 0.79%) of the test groups of the parent broiler herd was higher compared to the control (54.03 ± 0.67%) by 2.76 and 3.58%, respectively (P < 0.05-0.01). It was found that the carrying chickens of the second experimental group brought 183.5 ± 2.06 pieces of incubation eggs in 70 weeks, which is 8.97% higher than the corresponding indicator in the control group (168.4 ± 2.25 pieces) and 3.03% more than in 1 experimental group (178.1 ± 2.53 pieces). The number of incubation eggs of the parent broiler herd of the first test group was 5.76% higher than in the control. The fertilization of eggs in the 1st and 2nd test groups was 1.7 and 2.2% higher, respectively, than in the control group. According to the results of incubation, egg output in the 1st and 2nd test groups significantly exceeded the control group by 4.8 and 5.4%, respectively. The best results on chicken withdrawal were obtained in the 1st and 2nd test groups - 78.3 and 79.5%, respectively, and much lower in the control group - 77.3%.