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Avaliação do uso de inoculantes microbianos sobre a qualidade fermentativa e nutricional da silagem de milho Evaluation of microbial inoculation on nutritional and fermentative quality of corn silage

By Paulo Henrique Mazza Rodrigues, Juliana Martins Ruzante, Ana Lúcia Senatore, Félix Ribeiro de Lima, Laércio Melotti and Paula Marques Meyer

Abstract

Foram ensilados os milhos AG 510 e AG 5011 (Agroceres), formando oito tratamentos: controle (sem inoculantes), Sil-All® (S. faecium, P. acidilactici, L. plantarum, amilase, hemicelulase e celulase), Silobac® (L. plantarum, S. faecium e Lactobacillus sp.) e Pioneer 1174® (S. faecium e L. plantarum). Os silos utilizados foram confeccionados em baldes plástico (quatro repetições/tratamento), portando válvula "bunsen" para livre escape dos gases. Após 106 dias de armazenamento, os silos foram abertos e amostrados para análise da composição bromatológica e perfil fermentativo. Para os híbridos AG 510 e AG 5011, foram obtidas diferenças quanto aos teores de MS (35,26 vs. 44,06%), PB (8,07 vs. 9,73%), NIDA (19,04 vs. 24,76% do N total), FDN (62,03 vs. 64,71%), FDA (36,74 vs. 40,19%), lignina (11,24 vs. 12,57%), carboidratos solúveis (12,0 vs. 7,0%), amido (27,04 vs. 24,46%), pH (3,79 vs. 4,32), nitrogênio amoniacal (4,19 vs. 8,81% do N total), ácido láctico (4,875 vs. 1,421% da MS) e ácido acético (1,269 vs. 2,682% da MS). O produto Pionner 1174 incrementou os teores de carboidratos solúveis no híbrido AG 510, mas não no híbrido 5011. Apenas no híbrido AG 510 houve diferenças nos teores de amido, tendo sido maior no tratamento Pioneer e intermediário no Silobac, em relação ao controle e ao Sil-All. O híbrido AG 510 apresentou melhor perfil fermentativo, quando comparado ao AG 5011, embora não fossem demonstrados efeitos dos inoculantes sobre esses parâmetros.<br>The corn hybrids AG 510 and AG 5011 (Agroceres) were ensiled in plastic experimental silos (four units/treatment), consisting of eight treatments: control (without inoculation), Sil-All® (S. faecium, P. acidilactici, L. plantarum, amylase, hemicellulase, and cellulase), Silobac® (L. plantarum, S. faecium, and Lactobacillus sp.), and Pioneer 1174® (S. faecium and L. plantarum). Silos were opened 106 days after ensiling and sampled to proceed chemical analyses. AG 510 and AG 5011 hybrids differed for DM (35.26 vs. 44.06%), CP (8.07 vs. 9.73%), ADIN (19.04 vs. 24.76% of total N), NDF (62.03 vs. 64.71%), ADF (36.74 vs. 40.19%), lignin (11.24 vs. 12.57%), water soluble carbohydrates (12.0 vs. 7.0%), starch (27.04 vs. 24.46%), pH (3.79 vs. 4.32), amoniacal nitrogen (4.19 vs. 8.81% of total N), lactic acid (4.875 vs. 1.421% of DM) and acetic acid (1.269 vs. 2.682% of DM). Pionner 1174® increased water-soluble carbohydrate in AG 510 hybrid, but not in AG 5011. Inoculation with Pioneer and Silobac had the highest and the intermediate starch content, respectively, in relation to control and Sil-All in the AG 510 hybrid, but not in AG 5011. AG 510 provided better fermentation pattern when compared to AG 5011, although inoculants showed no effects on those parameters

Topics: ácidos orgânicos, bactérias ácido-láticas, fermentação, Zea mays, additives, ensiling, lactic acid bacteria, organic acids, Zea mays, Animal culture, SF1-1100, Agriculture, S, DOAJ:Animal Sciences, DOAJ:Agriculture and Food Sciences
Publisher: Sociedade Brasileira de Zootecnia
Year: 2004
DOI identifier: 10.1590/S1516-35982004000300003
OAI identifier: oai:doaj.org/article:1c554d9b02ad4e529f9110a562669ac0
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