INFLUENCE OF BREEDING METHODS AND AGE OF DANISH SOWS ON THEIR PRODUCTIVITY

The article compares the reproductive qualities of sows Danish selection obtained by different breeding methods during their seven farrowings in one farm. It was found that local F1 from mothers Landrace breed and boars Large White had a significant excess total number piglets at birth over analogs backcrossing two-breed with 0.90 head or 5.92 % (p<0,001). Both purebred significantly exceeded peers method stillborn 1.17 heads 45.88% (p<0.001) 0.5 26.60% respectively. probable lag terms proportion both 5.03% (p<0.05) – 9.29% (p<0.05). complex indicator qualities, calculated as an evaluation index, showed best such were possessed livestock for breeding, where animals scored 0.05 0.74 points more than Fr, calculation estimated index allowed to state higher value 109.66 points, which is 4.48 3.96 points. According results first farrowing, difference birth, fertility, weaning, safety, nest weight 1 weaning between groups not established but relative 0.75 60.00% (p<0.01) 5.09% (p<0.01). Evaluation data second, fourth, fifth seventh revealed no bulk indicators all groups. study third farrowing claiming this period probably control group second experimental (F1) 0.73 31.88% (p<0,05) Experimental III (Fr) 0.97 42.36% sixth II births 1,77 12.46% analogs, fertility rate 2.32 19.66% 1.41 9.99% (Fr), same time inferior safety 13.25% Intergroup analysis (Fr). dynamics absolute, average daily, growth (purebred Landrace) farrowings, did differ statistically. However, highest values: absolute increase 6.18 kg, exceeding 0.58 kg 10.36% (p <0.05), daily gain 221 g, 20 g 10.50 138.62%, 7.23% <0.01).