Thermal decomposition,chemical composition,in vitro digestibility and gas production and in situ degradability of oilseed residues from the biofuel industry |
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| Authors: | Anderson Dias Vieira de Souza Luís Carlos Vinhas Ítavo Simone Palma Fávaro Camila Celeste Brandão Ferreira Ítavo Hélène Veronique Petit Alexandre Menezes Dias Maria da Graça Morais Fernando Alvarenga Reis Renato Roscoe |
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| Affiliation: | 1. Catholic University Dom Bosco, Campo Grande, MS, Brazil;2. Federal University of Mato Grosso do Sul, Campo Grande, MS, Brazil;3. Brazilian Corporation of Agricultural Research ‐ Embrapa Agroenergy, Brasília, DF, Brazil;4. Agriculture and Agri‐Food Canada, Sherbrooke Research and Development Centre, Sherbrooke, QC, Canada;5. Brazilian Corporation of Agricultural Research ‐ Embrapa Beef Cattle, Campo Grande, MS, Brazil;6. Mato Grosso do Sul Foundation ‐ Department of Research and Dissemination of Agricultural Technologies, Maracajú, MS, Brazil |
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| Abstract: | Thermal analysis could rapidly and easily predict nutritional value of ruminant feeds. The hypothesis is that crambe meal (CM) has a quality similar to that of soybean meal (SM), and the objective of this study was to determine the nutritional characteristics of CM and compare them to those of SM. CM had greater concentrations of phytic acid (26.3 vs. 16.0 g/kg) and phenol compounds (615 vs. 393 mg gallic acid (GAE)/kg) than SM. In vitro dry matter (DM) digestibility was lower for CM than SM (752 vs. 975 g/kg DM). Cumulative in vitro gas production at 48 h of incubation (14.1 vs. 19.4 mL/100 mg substrate DM), and energy release (4.5 vs. 5.7 kJ/g substrate DM) were lower for CM than SM. CM had a higher concentration of low digestible fiber, hence degradability of DM was lower and the proportion of indigestible fraction was greater for CM than SM. High concentrations of indigestible compounds were likely responsible for lower gas production of CM compared to SM. These results suggest CM quality is lower than that of SM and that thermal analysis is a useful tool to precisely determine the nutritive value of oilseed residues. |
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| Keywords: | biofuel calorimetry degradability digestibility gas production |
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