What is the best additive to use at the ensiling of sugarcane SP81-3250?
C. H. S. Rabelo A D , A. P. Costa B , A. V. Rezende B , C. J. Härter A , L. A. Florentino B and F. H. S. Rabelo CA UNESP, Universidade Estadual Paulista, Department of Animal Sciences, 14884-900, Jaboticabal, SP, Brazil.
B UNIFENAS, Agriculture Department, Rodovia MG 179, km 0, 37130-000, Alfenas, MG, Brazil.
C Centro de Energia Nuclear na Agricultura, 13418-900, Piracicaba, SP, Brazil.
D Corresponding author. Email: carlos.zoo@hotmail.com
Animal Production Science 54(10) 1682-1686 https://doi.org/10.1071/AN14158
Submitted: 7 March 2014 Accepted: 18 June 2014 Published: 19 August 2014
Abstract
Our objective was to determine the best additive to use for the ensiling of sugarcane SP81-3250 based on the nutritional properties and aerobic stability of the silages. The additives evaluated were (1) and (2): salt (NaCl) at rates of 1.0 or 2.0 kg/100 kg fresh sugarcane (as-is basis), respectively; (3) and (4): quicklime (CaO) at rates of 1.0 or 2.0 kg/100 kg fresh sugarcane, respectively; (5) and (6): commercial inoculants Silobac® and Maize All®; and a control treatment. The addition of quicklime reduced the NDF and ADF contents of the silages by 11% compared with the control treatment, but did not increase the digestibility. On the other hand, after 24 h of in vitro fermentation, the application of 1.0 and 2.0% salt reduced the gas production by 34.15 and 33.55 mL/g OM, respectively, and the IVOMD was reduced 5.74 and 5.90%, respectively, compared with the untreated silage. Moreover, the addition of quicklime elevated the pH of the sugarcane silages, with a trend towards an increase in the DM recovery. In contrast, the bacterial inoculants did not alter the pH values, but there was an upward trend for a DM recovery. After the silos were opened, the silages that were treated with salt (independent of the dose) and 1.0% quicklime exhibited greater stability. We recommend applying 1.0 kg of quicklime to each 100 kg of sugarcane at the time of ensiling to improve the nutritional characteristics of sugarcane silage variety SP81-3250.
Additional keywords: animal nutrition, digestibility, quicklime, Lactobacillus spp., sodium chloride.
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