Green medicated supplement (Green MS) can reduce enteric methane emission from forage-based ruminant rations: In vitro study

Abstract

About 25% of the anthropogenic methane emissions are due to ruminal fermentation from ruminant livestock. Green medicated supplement (Green MS) is a prototype herb and slow-release urea-based supplement to reduce methane emissions from livestock. This experiment aimed to evaluate the methane emission and digestibility of forage-based rations supplemented with Green MS. This study examines six forages (palm oil leaves, rice straw, Napier grass, sugarcane leaves, native grass and maize straw). That six forages were supplemented with Green MS. The total treatments were 12, with four replications. A completely randomized design was applied in this study. Besides native grass, Green MS can reduce in vitro enteric methane by 0.23 - 3.05 ml/200 mg DM (P < 0.05). However, Green MS did not change the value of all forage’s optimum gas production (a+b). It is interesting to note that gas production from non-soluble fibre (GPNSF) could be enhanced with Green MS in maize straw and native grass (P < 0.05). The response to supplements varies depending on the utilization of the feed substrate in incubation. In conclusion, without affecting feed digestibility, Green MS supplementation could lower enteric methane emissions.

Influence of feed supplement based on Andrographis paniculata and irradiated chitosan on in vitro fermentation and methane production of selected forage

“…Methane emissions are correlated with high hemicellulose and NDF concentration [26]. Low-nutrient forages can increase methane emissions since ruminants' digestive systems process them more slowly [14,27].…”

“…Previous research indicated that feed supplements containing irradiated chitosan and Andrographis paniculata influenced the characteristics of forage gas production [14]. Haryati et al [11] also stated that the addition of feed additives chitin and chitosan has a significant impact on total gas production.…”

“…As ruminant feed supplements, it is necessary to evaluate the effectiveness of these two component combinations. Previous study reported that feed supplements based on herbs and chitosan could reduce methane emission without reducing forage digestibility [14]. However, to our knowledge, there are no studies that have evaluated the use of this feed supplement on some common forages from Wallacea region in Indonesia.…”