Chemical composition of sugarcane silages with crambe bran

Cíntia Gonçalves Guimarães,Antônio Ricardo Evangelista,Caroline Salezzi Bonfá,Alexandre Soares dos Santos,Amanda Gonçalves Guimarães,Elizzandra Marta Martins Gandini

doi:10.1590/1413-7054202044016920

Abstract

ABSTRACT We evaluated the contents of dry matter (DM), crude protein (CP), mineral matter (MM), soluble carbohydrates (CHOS), ammonia nitrogen (N-NH3), neutral detergent fiber (NDF), and acid detergent fiber (ADF) in sugarcane silages to which different levels of inclusion (LI) of crambe bran (CB) were added in proportions of 0, 3, 10, 17 and 20% at different storage times (ST). Laboratory silos were used, predetermined ST being 0, 3, 7, 12, 24, 36, 41, and 60 days after silage. For statistical analysis, the response surface methodology was used, in which LI and ST served as independent factors and response variables as dependent factors. The levels of DM and CP increased linearly with NI; however, it did not show any significant response regarding ST. The CHOS contents were reduced linearly with NI and displayed a quadratic response with ST. The interaction between NI and ST for the levels of N-NH3 was significant, as the levels reduced with the NI and ST. The levels of NDF and ADF reduced linearly with NI and displayed a quadratic response with ST. The CB showed high efficacy to improve fermentation of ensiled cane, with the addition and conservation of nutrients in all NI evaluated and over the storage time. In addition to the residues generated with the production of biodiesel in a sustainable way, CB is a viable alternative to the sugarcane silage.

Highlights

The use of renewable sources to generate energy, biofuels, has increased substantially in Brazil and the rest of the world (Santos et al, 2017)
During the opening of the silos in all storage times (ST), the material was homogenized, and the content was separated into two equal parts: one part was used in its wet form, and the other was pre-dried in a forced ventilation oven at 55 oC for 72 h according to the AOAC (1995)
Different levels of inclusion (LI) of the crambe bran (CB) in the sugarcane silage and different ST in days were tested as independent factors and their possible interactions

Summary

INTRODUCTION

The use of renewable sources to generate energy, biofuels, has increased substantially in Brazil and the rest of the world (Santos et al, 2017). The exclusive silage of sugarcane presents certain obstacles, such as low levels of dry matter (DM), crude protein (CP), and mineral matter (MM) (Cantoia Júnior et al, 2020) These factors can negatively affect the fermentation of the ensiled material due to the high humidity of the cane and nutritional quality of silages, which cannot be improved without the use of additives when ensiled. Crambe bran can be used as a humidity-absorbing additive in ensiled cane, as it contains high levels of DM (Oliveira et al, 2016; Barbosa et al, 2017), reducing nutritional losses during the process. Crambe bran has high levels of proteins and minerals, which add nutritional value to the co-product of the sugarcane ensilage. The study verified the effectiveness of the co-product in enhancing the nutritional value and reducing the losses during the process

MATERIAL AND METHODS

RESULTS AND DISCUSSION

CONCLUSIONS