Abstract
The forage silage process is one of the main forms of storage, maintaining its nutritional value during periods of drought. Aiming to improve the fermentation process and efficiency in the preservation of silages, microbial inoculants have been used in many rural properties. The objective of this study was to evaluate the nutritional quality of corn and sorghum silage plus doses of Silomax inoculant Corn and Sorghum (Lactobacillus plantarum) as additive at two cutting ages. The experiment was carried out at the Agricultural Center of the Federal Institute of Southeastern Minas - Campus Barbacena. The experimental design was completely randomized in a 2X3 factorial scheme with 5 replicates in PVC silos (30 cm long and 100 mm in diameter), totaling 30 silos for each crop. The inoculant was applied in the following doses: without inoculant (water only); 100 g per ton and 200 g per ton, the same for each cutting age. After 60 days of ensiling, the levels of crude protein (CP), dry matter (DM), neutral detergent fiber (NDF) and acid detergent fiber (FDA) were evaluated. The results showed that sorghum silage was significantly influenced in its DM by treatments (P = 0.0081), and no effects were observed between the ages of cut (P> 0.05) with DM ranging from 27.46 to 29.08% at the first cutting age and from 29.17 to 29.66% at the second cutting age. The use of the bacterial inoculant Lactobacillus plantarum had a consistent effect only on the dry matter levels of sorghum silage, not promoting significant changes on the other analyzed variables.
Highlights
Nutritional evaluation of corn and sorgo silages inoculated with Lactobacillus plantarum Abstract
Aiming to improve the fermentation process and efficiency in the preservation of silages, microbial inoculants have been used in many rural properties
The objective of this study was to evaluate the nutritional quality of corn and sorghum silage plus doses of Silomax inoculant Corn and Sorghum (Lactobacillus plantarum) as additive at two cutting ages
Summary
O experimento foi realizado no município de Barbacena, Minas Gerais (Latitude: 21° 13' 33'' S, Longitude: 43° 46' 25'' W e altitude: 1164 metros), localizado na região da Serra da Mantiqueira, mesorregião do Campo das Vertentes nas dependências do Instituto Federal de Educação, Ciência e Tecnologia do Sudeste de Minas – Campus Barbacena (EMBRAPA). A colheita do sorgo foi realizada aos 110 e 120 dias na fase de maturação fisiológica do grão (30% e 35% de MS) com uma ensiladeira regulada para picagem em partículas de 2,5 cm de comprimento, quando os grãos da porção mediana das panículas se encontravam no estádio farináceo. Foram utilizados 5 silos laboratoriais por tratamento, com ou sem inoculante e para cada uma das idades de corte, totalizando 60 silos, sendo 30 para milho e 30 para sorgo (Tabela 1). Foi utilizado um delineamento inteiramente casualizado em esquema fatorial (2:2:3) contento 30 parcelas experimentais para o milho e 30 para o sorgo igualmente divididas em 3 tratamentos (15 para cada idade de corte) utilizando o teste de Tukey, a 5% de significância pela análise de variância ANOVA. As análises estatísticas foram realizadas pelo programa SISVAR 5.6 (Ferreira, 2011)
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