Efeito da reensilagem e do uso de inoculante bacteriano na silagem de milho

Abstract

Corn is definitely the most used plant in Brazil and the world for the silage production. Corn silage is an extremely important bulky in the country, especially in the dry season of the year, when there is a shortage of forage. Climatic variability and lack of technical efficiency mean that many farms cannot produce and have to buy this feed for their animals. However, little is known about the consequences of this process of transfer of silage between properties. The objective of this study was to evaluate the effects of re-ensiling with the use of bacterial inoculant on the quality of corn silage. The hybrid BRS 1055 was ensiled with inoculant based on Lactobacillus plantarum and Propionibacterium acidipropionici, after removed from the silo and exposed to air for 36 hours, when it was re-ensiled. The experiment was delineated in a 2 x 2 factorial design, with the variables being inoculant use and re-ensilage. Changes in fermentation patterns, nutritional parameters, dry matter losses and microbial counts of the silages were tested. Re-ensiling resulted in increased pH and concentrations of acetic and propionic acids. As well as increased the contents of DM, CP, NDF and NDFap. On the other hand, there was a reduction in NFC concentration and in IVDMD with re-ensilage. All of these changes were explained by the higher effluent production and loss of DM in the re-ensiled material, which experience two compactions. Microbiology was not altered by the treatments. Likewise, the use of bacterial inoculant did not influence any of the evaluated aspects, except for the increase in ash concentration. Already, the re-ensilage, after 36 hours of aerobic exposure, caused a reduction in the nutritive value of corn silage and accentuated losses of DM