Natamycin as a potential silage additive: A lab trial using sugarcane to assess greenhouse gas emissions

Antonio Vinicius Iank Bueno¹,Charles Ortiz Novinski,Cimélio Bayer³,Gabriela Letícia Delai Vigne,Clóves Cabreira Jobim¹,Patrick Schmidt

doi:10.37496/rbz4920200017

Abstract

The objective of this study was to evaluate natamycin, Lactobacillus buchneri (LB), or their combination on the chemical composition, loss, fermentative profile, and aerobic stability as well as gas production and composition of sugarcane silages. The treatments were (wet basis): no additive (control), 10 g t−1 of natamycin (N10), 5 × 104 cfu g−1 of LB, and the combination of 4 g t−1 of natamycin and 2.5 × 104 cfu g−1 of LB (NLB). Sugarcane was chopped (10 mm), [...]

Highlights

Crop and livestock production systems are claimed as important sources of greenhouse gases (GHG), accounting for approximately 10 and 14.5% of total GHG emissions worldwide (Gerber et al, 2013; Tubiello et al, 2013; Tubiello et al, 2015)
The use of natamycin alone is not recommended when ethanol and aerobic stability are concerns
Four treatments were tested: control with no additive; 10 g t−1 of natamycin (N10); 5 × 104 cfu g−1 of L. buchneri NCIMB 40788 (LB – Lalsil Cana – Lallemand Animal Nutrition); and a combination of 4 g t−1 of natamycin and 2.5 × 104 cfu g−1 of Lactobacillus buchneri (LB) (NLB)

Summary

Introduction

Crop and livestock production systems are claimed as important sources of greenhouse gases (GHG), accounting for approximately 10 and 14.5% of total GHG emissions worldwide (Gerber et al, 2013; Tubiello et al, 2013; Tubiello et al, 2015). Silage production has been scarcely studied as a possible source of GHG (Grossi et al, 2019). Ensiling is one of the most common methods for long-term forage storage for ruminants, and its fermentation can lead to on-farm GHG emission. According to Henriksson et al (2012), higher dry matter (DM) losses during fermentation are linked to higher GHG emission from productive systems based on silage. Fermentation gases were not assessed by those authors. Several microorganisms are responsible for fermentation loss and gas emission from silage (e.g., heterofermentative lactic acid bacteria [LAB], clostridia, enterobacteria). For Natamycin as a potential silage additive: A lab trial using sugarcane to assess greenhouse gas emissions 2 instance, increases gas emission (mostly CO2) as well as volatile organic compound synthesis (mainly ethanol), reducing air quality and greatly contributing to greenhouse effect (McDonald et al, 1991; Hafner et al, 2010; Borreani et al, 2018)

Objectives

Methods

Results

Conclusion