Efeito da fonte protéica e do tratamento físico do concentrado, no desempenho de bovinos em confinamento e impacto ambiental dos dejetos
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Data
2006-03-03
Autores
Ribeiro, Glauco Mora [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
O ensaio foi conduzido na FCAV/ Unesp, utilizando 16 bovinos machos não castrados da raça Canchim, com peso médio inicial de 315 kg. Os animais foram alojados em baias individuais onde receberam os seguintes tratamentos: SF - concentrado farelado com farelo de soja; SE - concentrado extrusado com farelo de soja; AF - concentrado farelado com farelo de algodão; AE - concentrado extrusado com farelo de algodão. Como volumoso ofereceu-se a silagem de milho numa relação volumoso:concentrado de 50:50 com base na matéria seca. O período experimental foi de 112 dias. Os resultados foram avaliados num delineamento inteiramente casualizado, segundo esquema fatorial 2 x 2 (fontes protéicas x tratamentos físicos). As médias de ganho de peso, ganho em área de olho de lombo e ganho em espessura de gordura de cobertura, para os tratamentos SF, SE, AF e AE foram 1,64; 1,46; 1,35 e 1,35 kg; 20,24; 18,72; 22,88 e 16,21 cm2; 0,67; 0,58; 0,50 e 0,93 mm respectivamente, não apresentando diferença (P>0,05) entre qualquer um dos tratamentos. Na avaliação da conversão alimentar e eficiência protéica a análise estatística detectou diferença apenas entre fontes protéicas (P<0,05) com médias de conversão alimentar de 4,73 e 5,31 kg MS/kg PC e eficiência protéica de 1,78 e 1,59 kg PC/kg PB, respectivamente para os tratamentos com farelo de soja e farelo de algodão. As médias de balanço de nutrientes para MS, FDN e FDA para os tratamentos SF, SE, AF e AE foram 66,2; 66,7; 64,4 e 64,7%; 47,4; 43,3; 45,8 e 38,47% e 51,3; 45,2; 49,0 e 40,0% respectivamente, não apresentando diferença (P>0,05) entre os tratamentos...
The present work was carried out in Beef Cattle Setor of FCA V/Unesp, being used 16 males bovines non castrated of the Canchim crossbreed with initial average body weight of 315 kg. The animais were housed in individual stalls where they received the following treatments: GS - grounded concentrate with soybean meal; ES - extruded concentrate with soybean meal; GC - grounded concentrate with cottonseed meal; EC - extruded concentrated with cottonseed meal. The exclusive houghage offered was the com silage in a relationship of 50:50 in the dry matter basis. The experimental period was 112 days, sub-divided in four sub-periods of 28 days, which it was evaluated the variations of the body weight, loin eye area and the backfat. For the data statistical treatment, the arrangement used was the total randomized design, in a factorial scheme 2 x 2 (two protein sources x two physical treatments), being the averages compared by the Tukey test. The averages of daily weight gain, loin eye area and backfat gains, for the treatments GS, ES, GC and EC were 1.64, 1.46, 1.35 and 1.35 kg; 20.24, 18.72, 22.88 and 16.21 cm2; 0.67, 0.58, 0.50 and 0.93 mm respectively, not presenting difference (P>0,05) among the treatments. In the evaluation of the feed conversion the statistical analysis detected differences among protein sources (P<0,05) with averages of 4.73 and 5.31 kg DM/kg BW respectively for the treatments with soybean meal and cottonseed meal. The averages of DMB, NDFB and ADFB for the treatments GS, ES, GC and EC were 66.16, 66.66, 64.43 and 64.72%; 47.36, 43.30, 45.81 and 38.47% and 51.30, 45.24, 49.03 and 39.98% respectively, not presenting difference (P>0,05) among treatments ... (Complete abstract, click eletronic address below)
The present work was carried out in Beef Cattle Setor of FCA V/Unesp, being used 16 males bovines non castrated of the Canchim crossbreed with initial average body weight of 315 kg. The animais were housed in individual stalls where they received the following treatments: GS - grounded concentrate with soybean meal; ES - extruded concentrate with soybean meal; GC - grounded concentrate with cottonseed meal; EC - extruded concentrated with cottonseed meal. The exclusive houghage offered was the com silage in a relationship of 50:50 in the dry matter basis. The experimental period was 112 days, sub-divided in four sub-periods of 28 days, which it was evaluated the variations of the body weight, loin eye area and the backfat. For the data statistical treatment, the arrangement used was the total randomized design, in a factorial scheme 2 x 2 (two protein sources x two physical treatments), being the averages compared by the Tukey test. The averages of daily weight gain, loin eye area and backfat gains, for the treatments GS, ES, GC and EC were 1.64, 1.46, 1.35 and 1.35 kg; 20.24, 18.72, 22.88 and 16.21 cm2; 0.67, 0.58, 0.50 and 0.93 mm respectively, not presenting difference (P>0,05) among the treatments. In the evaluation of the feed conversion the statistical analysis detected differences among protein sources (P<0,05) with averages of 4.73 and 5.31 kg DM/kg BW respectively for the treatments with soybean meal and cottonseed meal. The averages of DMB, NDFB and ADFB for the treatments GS, ES, GC and EC were 66.16, 66.66, 64.43 and 64.72%; 47.36, 43.30, 45.81 and 38.47% and 51.30, 45.24, 49.03 and 39.98% respectively, not presenting difference (P>0,05) among treatments ... (Complete abstract, click eletronic address below)
Descrição
Palavras-chave
Biogas, Bovino de corte - Confinamento, Farelo de soja como ração, Minerais na nutrição animal, Fezes, Extrusão, Farelo de algodão, Beef cattle, Biogas, cottonseed meal, feces, Minerals, Soybean meal
Como citar
RIBEIRO, Glauco Mora. Efeito da fonte protéica e do tratamento físico do concentrado, no desempenho de bovinos em confinamento e impacto ambiental dos dejetos. 2006. xvii, 77 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, 2006.