Pregledni rad
PROPER AMINO ACID SUPPLY CONTRIBUTES TO MORE ECONOMICAL PIG BREEDING
Libuška Ivandija
; Istraživački Institut Pliva, Zagreb, Hrvatska
Sažetak
Development of an optimal feeding programme in pig breeding requires genetic animal potential, production economy, maximal stimulation of muscle development and meat of acceptable quality. Feed makes 65% to 75% ol total production costs, thus its price is of vital importance for profitability in pig breeding. With the aim of more economical pork production, the future feeding programmes will have to apply a model based on precisely calculated daily needs in the grower/finisher period. During this period only 75% of the total feed consumption is needed (from farrowing to the end of fattening), so the effect on profitability is higher than in other periods. Since feed consumption is the key factor in deciding concentrations of nutrients in feed, it is important to measure feed consumption in given conditions and the data thus obtained use in formulating feeds for each genotype and sex. Within a genotype sows consume less feed than castrates, but produce more meat and the biggest differences between the sexes appear at body weight of 32 - 90 kg. For this reason the optimal dietary amino acid supply in sows must reflect higher daily needs as well as lower feed consumption during a specific growth period. Advantages of meals adapted to sex can be observed if animals are kept separately. This paper contains suggestions for protein/lysine level in the feed of pigs of mixed or separate sex of 18-109 kg body weight. Applying feeding programmes of two protein levels (13% and 18%) in sows during farrowing and lactation results in bigger litter and heavier pigs at weaning, without additional expenses for feed.
Ključne riječi
Hrčak ID:
164939
URI
Datum izdavanja:
23.12.1994.
Posjeta: 805 *