Detalhes bibliográficos
| Ano de defesa: |
2014 |
| Autor(a) principal: |
Resende, Moisés Queiroz
 |
| Orientador(a): |
Mello, Heloisa Helena de Carvalho
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| Banca de defesa: |
Mello, Heloisa Helena de Carvalho,
Carvalho, Thony Assis,
Di Campos, Melissa Selaysim |
| Tipo de documento: |
Dissertação
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| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal de Goiás
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| Programa de Pós-Graduação: |
Programa de Pós-graduação em Ciência Animal (EVZ)
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| Departamento: |
Escola de Veterinária e Zootecnia - EVZ (RG)
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| País: |
Brasil
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| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://repositorio.bc.ufg.br/tede/handle/tede/4056
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Resumo: |
ABSTRACT: Two experiments were conduct to evaluate the effect of using soy protein concentrate (SPC) in pre-starter piglet diets over performance, intestinal histomofometria and blood parameters. In the first trial 72 piglets weaned at 21 days of age were used and 54 for the second trial. Both were conducted as a randomized blocks design with six replications and three piglets per unit. The first trial had four diets (0% SPC, 3% SPC, 6% SPC and 9% SPC), which evaluated different levels of SPC inclusion in diets, and the second trial, which evaluated the replacement of spray dried blood plasma (SDP) by SPC, had three diets (0.0%-SPC + 5.0-SDP, 2.5%-SPC + 2.5%-SDP and 5.0%-SPC + 0.0%-SDP). In both trials, diets and water were offered ad libitum in pre-starter l (21-32 days old) and pre-starter ll (33-42 days old) phases, but during the starter phase (43-66 days old) all piglets received a single diet. At 32 days of age, blood was collected from one animal per experimental unit and then these animals were euthanized to collect samples of the small intestine. Linear effect was observed In the first trial, over feed conversion (FC) as the level of CPS in diet was increased in the period between 21 and 32 days of age. Linear effect was also observed on the FC in the period of 33-42 days old, however in a reverse form from the previous period, wherein the increase of the SPC level in diets resulted in the increase of FC. In the total period of this trial (21-66 days old), it was found a quadratic effect of SPC on piglets FC. In the second trial, the replacement of SDP by CPS caused effect on performance variables, except for feed conversion (FC) during 21-32 days of piglets age. The average daily feed intake (ADFI) was higher for pigs fed 2.5%-SPC + 2.5%-SDP and the average daily gain (ADG) and the final body weight (FBW) of the piglets in this period was higher for 2.5%-SPC + 2.5%-SDP compared to 5.0%-SPC + 0.0%-SDP. In the period of 21-42 days old, it was observed best results of ADFI and FBW for piglets fed diet containing 2.5%-SPC + 2.5%-SDP compared to piglets fed 5.0%-SPC + 0.0%-SDP. The ADG showed better results for diets containing 0.0%-SPC + 5,0-SDP and 2.5%-SPC + 2.5%-SDP and FC was higher for the diet with 0.0%-SPC + 5.0%-SDP compared to the diet with 5.0%-SPC + 0.0%-SDP. During total period of the experiment (21-66 days old) ADG and ADFI was influenced by substitution of SDP for SPC, wherein the best results was presented by piglets fed 2.5%-SPC + 2.5%-SDP compared to those fed 5.0%-SPC + 0.0%-SDP. In both trials, no effect was observed upon histomorphometric variables (villus height, crypt depth and villus: crypt). Regarding the blood variables (leukocytes, eosinophils and lymphocytes), no effect of SPC at 32 days of age the piglets was observed in the first trial. But in the second trial, total leukocyte count was higher in animals fed 5.0%-SPC + 0.0%-SDP compared to ones fed 0.0%-SPC + 5.0%-SDP and lymphocyte count was lower in piglets receiving 0.0%-SPC + 5.0%-SDP. In the first trial, the use of SPC in diets of post-weaning piglets during pre-starter period (21-42 days old) did not influence performance from 21 to 66 days of life, or intestinal morphology and leukocyte, lymphocytes and eosinophils count in these animals. In the second, the combined use of SPC and SDP in the diets of pigs between 21 and 42 days of age reduces the activation of the immune system and improves productive performance. |
