Avaliação e utilização de silagens de grão úmido de milho sobre o desempenho e características de carcaça de caprinos
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Data
2009-01-19
Autores
Oliveira, Rodrigo Vidal [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
Objetivou-se com o presente trabalho avaliar os efeitos do Lactobacillus plantarum (LP), Lactobacillus buchneri (LB), Benzoato de sódio (BS) e suas associações (LPLB e LPBS) sobre a redução das perdas quantitativas e qualitativas das silagens de grãos úmidos de milho (SGUM) e o controle da população de leveduras e fungos durante a exposição aeróbia das mesmas; os efeitos sobre a digestibilidade e o desempenho de cabritos alimentados com essas silagens; assim como a utilização da ultrassonografia e medidas biométricas como método indireto na estimativa das características da carcaça. Para tanto, foram realizados dois experimentos: no experimento 1 foram utilizados silos experimentais, nos quais foram determinadas as perdas de matéria seca (MS) por gases (PG), a recuperação de MS, teores de MS, nitrogênio amoniacal, valores de pH ocorrido durante a fermentação e estabilidade aeróbia (EA), assim como contagem de fungos e leveduras durante a EA das silagens. Na avaliação do processo fermentativo, utilizou-se o delineamento inteiramente casualizado (DIC), em arranjo fatorial 6 X 6 (6 silagens e 6 tempos) e na fase de exposição aeróbia utilizou-se um DIC em parcelas subdivididas, sendo as parcelas representadas pelas silagens experimentais e as sub-parcelas pelos tempos de exposição (0, 4, 8 e 12 dias). O experimento 2 consistiu de dois ensaios de digestibilidade e um de desempenho utilizando-se 24 cabritos (16 ¾ Boer e ¼ Saanen e 8 Saanen puros) machos, castrados e confinados por 84 dias. Foram determinadas as medidas biométricas, condição corporal e as mensurações através do ultrassom no animal vivo, assim como as medidas da carcaça após o abate e resfriamento por 24 h. Utilizou-se o DIC em parcelas subdivididas, tendo na parcela um fatorial 4 X 2 (4 rações e 2 grupos genéticos) e na subparcela os ensaios. As rações foram compostas por feno de Tifton...
The objective of this study was to evaluate the effects of Lactobacillus plantarum (LP), Lactobacillus buchneri (LB), Sodium benzoate (SB) and their associations (LPLB and LPBS) on the reduction of quantitative and qualitative losses of high moisture corn silages (HMCS) and the control of yeast and fungi populations during fermentation and aerobic exposition of the same, the effects on digestibility and performance of goats fed with these silages, as well as the use of ultrasound and biometric measures as indirect method to estimate the carcass characteristics. For this, two experiments were conducted: in the first experiment were used experimental silos, in which were determined the losses of dry matter for gases (GL), the recovery of dry matter (DM), levels of DM, ammonia nitrogen, pH values occurred during fermentation and aerobic stability (AS), as well as fungi and yeast counts during the AS of the silage. In evaluating of the fermentation process, was used the completely randomized design (CRD) in a factorial arrangement 6 X 6 (6 silages and 6 times) and in the aerobic exposition phase was used a split-plot in CRD, and the plots were represented by experimental silages and the sub-plots by time of exposition (0, 4, 8 and 12 days). The second experiment consisted of two digestibility trials and one about performance of 24 goats (16 ¾ Boer and ¼ Saanen and 8 Saanen blood pure) males, castrated and feedlot for 84 days. Biometric and ultrasound measures in the living animal were determined, as well as carcass measures after slaughtered and chilling for 24 hours. The CRD was used in split-plot arrangement, using in the plots a factorial 4 x 2 arrangement (4 rations and 2 genetic groups) and the sub-plots the trials. The rations were composed by Tifton 85 hay (53.3%), soybean meal (12.15%), urea (0.25%) and mineral mixture (2%), being added... (Complete abstract click electronic access below)
The objective of this study was to evaluate the effects of Lactobacillus plantarum (LP), Lactobacillus buchneri (LB), Sodium benzoate (SB) and their associations (LPLB and LPBS) on the reduction of quantitative and qualitative losses of high moisture corn silages (HMCS) and the control of yeast and fungi populations during fermentation and aerobic exposition of the same, the effects on digestibility and performance of goats fed with these silages, as well as the use of ultrasound and biometric measures as indirect method to estimate the carcass characteristics. For this, two experiments were conducted: in the first experiment were used experimental silos, in which were determined the losses of dry matter for gases (GL), the recovery of dry matter (DM), levels of DM, ammonia nitrogen, pH values occurred during fermentation and aerobic stability (AS), as well as fungi and yeast counts during the AS of the silage. In evaluating of the fermentation process, was used the completely randomized design (CRD) in a factorial arrangement 6 X 6 (6 silages and 6 times) and in the aerobic exposition phase was used a split-plot in CRD, and the plots were represented by experimental silages and the sub-plots by time of exposition (0, 4, 8 and 12 days). The second experiment consisted of two digestibility trials and one about performance of 24 goats (16 ¾ Boer and ¼ Saanen and 8 Saanen blood pure) males, castrated and feedlot for 84 days. Biometric and ultrasound measures in the living animal were determined, as well as carcass measures after slaughtered and chilling for 24 hours. The CRD was used in split-plot arrangement, using in the plots a factorial 4 x 2 arrangement (4 rations and 2 genetic groups) and the sub-plots the trials. The rations were composed by Tifton 85 hay (53.3%), soybean meal (12.15%), urea (0.25%) and mineral mixture (2%), being added... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Biometrics, Feed efficiency, loin eye area, Sodium benzoate, Weight gain, Caprino - Eficiência alimentar, Biometria, Área de olho de lombo, Benzoato de sódio, Ganho de peso, Lactobacillus buchneri
Como citar
OLIVEIRA, Rodrigo Vidal. Avaliação e utilização de silagens de grão úmido de milho sobre o desempenho e características de carcaça de caprinos. 2009. xiii, 111 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, 2009.