Fattening and slaughter qualities of pigs of different weight categories grown up in pens on a polymeric and concrete floor
Abstract
The fattening and slaughter qualities of pigs of various weight categories (100; 110 and 120 kg), grown in pens on polymer and concrete floors, were studied. The experimental animals were placed in premises for growing up according to the same type of microclimate control system, in pens of the same design on a partially slotted floor at the rate of 0.32 m2 per head. The piglets of the control group were kept in a pen on a partially slotted polymer floor, and their analogs of the research group were carried out in a pen on a partially slotted concrete floor with a slot size of 15 mm. Ventilation in both rooms was negative pressure and maintained automatically. Heating was carried out using water heating built into the solid part of the floor. The resting place for piglets was 0.15 m2 per head. According to the research results, it was found that the potential for fattening productivity, caused by better conditions during the rearing period, was leveled with an increase in the slaughter weight. The living conditions during the rearing of piglets influenced the implementation of their fattening indicators, both with live weights of 100, 110, and 120 kg. With an increase in the pre-slaughter live weight, the influence of the conditions of keeping piglets on growing up decreased. Studies have shown that the conditions for rearing piglets in pens with the replacement of a part of the floor from polymer to concrete had a negative impact on the realization of the potential of meat productivity. A tendency was established for the deterioration of all slaughter qualities in pigs, which were raised in pens using a slatted concrete floor, and a significant decrease in the weight of the rear third of the half carcass was revealed by 3.6-7.5% at the slaughter of all studied weight conditions. Pig carcasses kept in stalls with a slatted polymer floor were found to have a higher meat content and less fat than analogs that were grown on a concrete slatted floor. With an increase in the pre-slaughter live weight of pigs of both types of maintenance, the content of meat and bones in their carcasses decreased and the content of fat increased.
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