Perfil fermentativo, estabilidade aeróbia e valor nutritivo de silagens de capim-marandu ensilado com aditivos
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Data
2008-10-01
Autores
Bernardes, Thiago Fernandes
Reis, Ricardo Andrade [UNESP]
Amaral, Rafael Camargo do
Siqueira, Gustavo Rezende
Roth, Anna Paula de Toledo Piza [UNESP]
Roth, Marcella de Toledo Piza [UNESP]
Berchielli, Telma Teresinha [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Zootecnia
Resumo
Com o objetivo de avaliar as perdas em silagem de capim-marandu produzidas com aditivos foram desenvolvidos dois experimentos. No experimento 1, objetivou-se conhecer o perfil de fermentação e a estabilidade aeróbia de quatro silagens: 1) forragem não tratada (Controle); 2) tratada com Lactobacillus plantarum e Propionibacterium; 3) tratada com Lactobacillus buchneri; e 4) tratada com 0,1% de benzoato de sódio. No experimento 2, foram utilizados nove novilhos castrados Nelore (PC de 350 ± 38,9 kg), alocados em três quadrados latinos 3 x 3 para avaliação do consumo e da digestibilidade das rações contendo 85,4% das seguintes silagens de capim-marandu: 1) controle; 2) controle com L. plantarum, Pediococcus acidilactici + enzimas fibrolíticas; e 3) tratamento 2 + L. buchneri. No experimento 1, as silagens apresentaram baixas recuperações de MS durante a fermentação (média de 86%) e os coeficientes de digestibilidade in vitro da matéria seca reduziram de 65,5% (momento da ensilagem) para 50,0% no 60º dia após o fechamento dos silos. No experimento 2, o valor médio de consumo das rações foi de 5,7 kg MS/dia (1,6% PC) e a digestibilidade de 51,6% e não diferiram entre as rações. As silagens apresentaram perdas acentuadas na fase fermentativa e o uso de aditivos não alterou essas perdas. A inoculação com bactérias não influenciou o consumo ou a digestibilidade das rações.
Two trials were conducted to evaluate losses of Marandu grass silages using different additives. The fermentation profile and aerobic stability of the silages were evaluated on the first trial. The followings silages were evaluated: 1 - Marandu grass (Control), 2 - Marandu grass plus L. plantarum and Propionibacterium, 3 - Marandu grass plus L. buchneri, 4 - Marandu grass plus 0.1% of sodium benzoate. on the second experiment, it was utilized nine castrated Nellore steers (Body weight 350 ± 38.9 kg) allocated in three Latin squares (3 x 3) to evaluate the intake and digestibility of the total mixed rations containing 85% of Marandu silage. The followings silages were evaluated: 1 - Marandu grass (Control), 2 - Marandu grass plus L. plantarum, Pediococcus acidilactici associated to fibrolitic enzymes, and 3 - Marandu grass plus L. plantarum, Pediococcus acidilactici associated to fibrolitic enzymes plus L. buchneri. on the experiment 1, the silages showed lowest dry matter recovery (average 86%). The in vitro true dry matter digestibility reduced from 65.5%, before Marandu ensilage, to 50.0% after 60 days of silo closure. on the second trial, the average total mixed feed intake was 5.7 kg DM/day (1.6% of the BW), and the digestibility values (51.6%) was similar among rations. The evaluated silages showed high losses during the fermentative phase, and additive application did not change these profiles. The bacteria application didn't affect the dry matter intake of rations and digestibility values.
Two trials were conducted to evaluate losses of Marandu grass silages using different additives. The fermentation profile and aerobic stability of the silages were evaluated on the first trial. The followings silages were evaluated: 1 - Marandu grass (Control), 2 - Marandu grass plus L. plantarum and Propionibacterium, 3 - Marandu grass plus L. buchneri, 4 - Marandu grass plus 0.1% of sodium benzoate. on the second experiment, it was utilized nine castrated Nellore steers (Body weight 350 ± 38.9 kg) allocated in three Latin squares (3 x 3) to evaluate the intake and digestibility of the total mixed rations containing 85% of Marandu silage. The followings silages were evaluated: 1 - Marandu grass (Control), 2 - Marandu grass plus L. plantarum, Pediococcus acidilactici associated to fibrolitic enzymes, and 3 - Marandu grass plus L. plantarum, Pediococcus acidilactici associated to fibrolitic enzymes plus L. buchneri. on the experiment 1, the silages showed lowest dry matter recovery (average 86%). The in vitro true dry matter digestibility reduced from 65.5%, before Marandu ensilage, to 50.0% after 60 days of silo closure. on the second trial, the average total mixed feed intake was 5.7 kg DM/day (1.6% of the BW), and the digestibility values (51.6%) was similar among rations. The evaluated silages showed high losses during the fermentative phase, and additive application did not change these profiles. The bacteria application didn't affect the dry matter intake of rations and digestibility values.
Descrição
Palavras-chave
Brachiaria brizantha, Inoculant, Intake, Lactobacillus, losses, Brachiaria brizantha, Consumo, Inoculante, Lactobacillus, Perdas
Como citar
Revista Brasileira de Zootecnia. Sociedade Brasileira de Zootecnia, v. 37, n. 10, p. 1728-1736, 2008.