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Previous issue date: 2008-04-10 / The present work was conducted in the Swine Experimental Unity of the UFRRJ
Animal Science Institute, from august to november, 2005, to evaluate different levels of
barley bagasse included in diets for swines in growing phase, from 35 to 60 kg of live
weight. It was used 20 crossbreed gilts, with 35 kg on average of live weight, in a
randomized blocks experimental design with five treatments, and four blocks. The five
levels of barley bagasse inclusion were 0, 12.5, 25, 37.5 and 50%, replacing the ration
based on the dry matter of the reference ration (0% of inclusion). The performance
variables ration intake (RI), barley bagasse intake (BBI), total feed intake (TFI), daily
ration intake (DRI), daily barley bagasse intake (DBBI), daily feed intake (DFI), total
body weight gain (TWG), daily body weight gain (DWG) and feed conversion (FC),
also carcass characteristics and weights of organs and visceras were submitted to
variance and polynomial regression analysis. It was observed linear reduction on RI and
quadratic effect on all the other performance parameters evaluated. The BBI increased
with the BB increasing level while TFI increased until 14.91% then decreasing after this
level of inclusion. A quadratic effect was observed on DRI and DBBI while DFI
increased until the level of 15.00% then decreasing after this level of inclusion. TWG
and DWG increased until levels of 12.89 and 14.00% respectively, then decreasing after
this level of inclusion. The FC improved progressively until 13.34% of inclusion then
getting worse after this level of inclusion. Were evaluated: hot carcass weight (HCW),
cold carcass weight (CCW), carcass length (CL) and carcass yields (CY), backfat
thickness (BT), ham weight (HW) and ham yield (HY), palette weight (PW) and palette
yield (PY), lomb weight (LW) and lomb yield (LY), and loin eye area (LEA). It was
observed a quadratic effect on HCW and a linear reduction effect on PW and PY, as the
level of barley bagasse inclusion was increased in the swines diets, with none influence
on the other carcass characteristics. The Weights of gastro-intestinal tracts (GIT),
viscera (VISC), stomach (SW) and liver (LW) were evaluated. There was not any
influence on the weights of these last variables due to the level of BB in the growing
phase diet. It was observed linear reduction in the feeding cost (FCT) and quadratic
effect in the cost per unit of gain (CPUG), which decreased until 22.72% and increasing
after this level of BB inclusion. The best level of BB inclusion in diets for swines in
growing phase would be 14.91% for higher total DM intake, 12.89% for higher
bodyweight gain and 13.34% for the best feed conversion. BB can be included in the
growing diet up to 17,36%, without compromising the carcass quality of swines
slaughtered at 100 kg of liveweight. BB can be included up to 22.72% in diets of swines
in growing phase for reduction of the feeding costs. / O presente trabalho foi realizado no Setor de Suinocultura do Instituto de Zootecnia da
Universidade Federal Rural do Rio de Janeiro (FAIZ/UFRRJ), durante o per?odo de
agosto a novembro de 2005, com o objetivo de avaliar diferentes n?veis de inclus?o de
baga?o de cevada na dieta de su?nos em fase de crescimento, dos 35 aos 60 kg de peso
vivo. Foram utilizados 20 animais mesti?os das ra?as Large White, Duroc e Landrace,
f?meas com peso m?dio de 35 kg, distribu?dos em delineamento de blocos ao acaso com
cinco tratamentos e quatro blocos. Os cinco n?veis de inclus?o de baga?o de cevada na
dieta foram: 0%; 12,5%; 25%; 37,5% e 50%, substituindo a ra??o com base na mat?ria
seca da ra??o refer?ncia (0% de inclus?o). Os par?metros de desempenho consumo de
ra??o (CR), consumo de baga?o de cevada (CBC), consumo total (CT), consumo di?rio
de ra??o (CDR), consumo di?rio de baga?o de cevada (CDBC), consumo di?rio (CD),
ganho de peso total (GP), ganho de peso di?rio (GPD) e convers?o alimentar (CA),
assim como caracter?sticas de carca?a e pesos dos ?rg?os e das v?sceras foram
submetidos ? an?lise de vari?ncia e de regress?o. Observou-se redu??o linear no CR, e
efeito quadr?tico sobre os demais par?metros de desempenho estudados. Observou-se
efeito quadr?tico sobre o CBC com o aumento do n?vel de inclus?o, enquanto o CT
aumentou at? o n?vel de 14,91% e reduziu ap?s esse n?vel de inclus?o. Observou-se
efeito quadr?tico no CDR e no CDBC enquanto o CD aumentou at? o n?vel de 15,00%
passando a diminuir ap?s esse n?vel de inclus?o. O GP e o GPD aumentaram at? o n?vel
de 12,89 e 14,00% respectivamente, apresentando redu??o ap?s esse n?vel de inclus?o.
A CA melhorou gradativamente com a inclus?o at? o n?vel de 13,34% passando a piorar
ap?s esse n?vel de inclus?o. Foram avaliados: peso de carca?a quente (PCQ), peso de
carca?a resfriada (PCR), comprimento de carca?a (CC) e rendimento de carca?a (RC),
espessura de toucinho (ET), peso de pernil (PP) e rendimento de pernil (RP), peso de
paleta (PPL) e rendimento de paleta (RPPL), peso de lombo (PL) e rendimento de
lombo (RL), e ?rea de olho de lombo (AOL). Observou-se efeito quadr?tico no PCQ e
efeito linear no PPL e no RPPL, ? medida que se aumentou o n?vel de baga?o de cevada
na dieta dos su?nos, n?o tendo sido observado influ?ncia sobre os demais par?metros de
carca?a. Foram avaliados os pesos de trato gastro-intestinal (TGI), das v?sceras (VISC),
de est?mago (EST) e de f?gado (FIG). N?o houve influ?ncia do n?vel de baga?o de
cevada na dieta dos su?nos em crescimento sobre esses par?metros. Observou-se
redu??o linear no custo de alimenta??o (CAL) e efeito quadr?tico no custo por unidade
de ganho (CPUG), observando-se redu??o em at? 22,72% no CPUG e aumento ap?s
esse n?vel. O melhor n?vel de inclus?o de baga?o de cevada em dietas para su?nos em
crescimento seria de 14,91%, para maior consumo total de MS, 12,89% para m?ximo
ganho de peso e 13,34% para a melhor CA. O baga?o de cevada pode ser inclu?do na
dieta de su?nos em fase de crescimento em n?veis de at? 17,36%, sem comprometer a
qualidade de carca?a de su?nos abatidos aos 100 kg de peso vivo. O baga?o de cevada
pode ser inclu?do na dieta de su?nos em fase de crescimento em n?veis de at? 22,72%
para redu??o dos custos de alimenta??o.
| Identifer | oai:union.ndltd.org:IBICT/oai:localhost:tede/578 |
| Date | 10 April 2008 |
| Creators | Braz, Jamil Monte |
| Contributors | Vieira, Antonio Assis |
| Publisher | Universidade Federal Rural do Rio de Janeiro, Curso de P?s-Gradua??o em Zootecnia, UFRRJ, Brasil, Produ??o Animal |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFRRJ, instname:Universidade Federal Rural do Rio de Janeiro, instacron:UFRRJ |
| Rights | info:eu-repo/semantics/openAccess |
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