After extraction of essential oil from lemongrass (
Cymbopogon citratus
[DC.] Stapf) leaves by steam distillation (heat
treatment), large amounts of organic wastes are obtained. This by-product could easily be used as animal feed. The potential
of sugarcane molasse and whey as additives to ensile lemongrass leaves was investigated. The vegetative material was
obtained after essential oils were extracted from lemongrass leaves with steam distillation. Lemongrass leaves were chopped,
mixed with sugarcane molasse and whey, placed in cylindrical plastic containers, hermetically closed. The experimental
design for pH optimization was a response surface 3-level factorial design 3
2 with three replicates. Sugarcane molasse at
5, 10 and 15% (w/w) and whey at 20, 25 and 30% (w/w) were used. The pH of the silage decreased significantly in each
treatment, but it was faster when sugarcane molasse was added. The lactic acid concentration was 2.8 g kg
-1 DM in silage
amended with 15% molasse plus 25% whey and was higher than in silage supplemented with commercial additive after 15
d. In conclusion, it was shown that lemongrass leaves obtained as by product after extracting essential oils can be effectively
ensiled with whey and sugarcane molasse as additives inducing a faster production of lactic acid.
