Suínos na fase de creche alimentados com rações extrusadas com ou sem flavorizantes : desempenho e digestibilidade
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Data
2009-07-28
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Universidade Federal de Goiás
Resumo
As the nutritional demand of pigs in the nursery phase is high, it is necessary
the diets are based on ingredients palatable high
availability of nutrients. Accordingly, the floating diets may
meet the physiological demands of piglets, since the extrusion breaks the
physical barriers that surround the granules of ingredients, improving their
palatability and digestibility. This work aimed to evaluate the digestibility
the nutrients and extruded with or without the addition of
flavoring additives for piglets in the nursery phase, and the performance
animals and economic viability of these rations. The experiments were
performed at the Department of Aquaculture Department of Animal Production
Veterinary School of UFG. In the digestibility experiment were
determined the digestibility of nutrients. The
experimental period lasted 26 days, divided into two periods of 13 days,
being five days for animals to adapt to cages and regularization of
diets in the gastrointestinal tract of animals, three days to stabilize the
metabolic consumption and five days for collection of feces and urine.
To this end, we used 12 hybrid animals, castrated male per period.
The design was a randomized block design, with four treatments and
six replicates. The treatments were: T1 - reference diet mash, the
corn and soybean meal supplemented with minerals and vitamins, so
to meet the requirements of animals; T2 - T1 feed submitted to extrusion, T3 --
T2 extruded food additives and flavorings T4 - T3 with feed moisture. In
performance experiment we used the randomized block design with
four treatments and six replications. The treatments were the same
the digestibility trial. In this test we used 48 hybrid animals
commercial, 24 barrows and 24 females, to evaluate the
performance of animals through the variables of weight gain, consumption of
and feed conversion. The results were analyzed by analysis
variance (ANOVA) and submitted to the Student t test. Energy values
showed gross differences among the treatments. In
digestibility of dry matter, ash, coefficient
metabolization of dry matter, crude protein and gross energy did not occur
statistical difference, as well as the balance of N in the treatments.
The digestibility of crude protein and ether extract differed
significantly to the treatment with extruded flavoring additives and 5%
moisture. The results related to the availability of Ca in the diets differed
between treatments with floating diets without additives, that
The lowest mineral excreted. Performance, not
observed differences in the variables initial weight, final weight, daily weight gain
and total, and total feed intake. While, for the variable
food (p <0.05), statistical difference, with the best conversion
given was the group of animals that received extruded without
additives. The results showed that the physical form of ration, both interfered
the acceptability and palatability of the diet. Treatment extruded without
additives had a better availability of nutrients, probably due
the thermal processing of feed during extrusion when compared with the
treatment T1. The average cost of feed / kg were R $ 0.49, 0.39;
0.43 and 0.59, therefore the cost index was 123.4%, 100%, 108.1%
and 147.2% for the NPK treatments, extruded without additives, extruded with
additives and with additives and extruded 5% moisture, respectively. Using extruded without additives for piglets in the nursery phase provided best results of feed intake, feed conversion and lower cost / kg weight produced when compared with dry feed and feed extrusion
flavoring additives
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Citação
ROCHA, Laudicéia Oliveira da. Pigs in the nursery fed diets extruded with or without flavoring: performance and digestibility. 2009. 59 f. Dissertação (Mestrado em Ciências Agrárias - Veterinaria) - Universidade Federal de Goiás, Goiânia, 2009.