Greenhouse gas (GHG; methane and nitrous oxide) emissions from enteric fermentation and manure management of Indian livestock were estimated from the last two Indian livestock census datasets (2003 and 2007) using IPCC Tier 2 (2006) guidelines. The total annual GHG emissions from Indian livestock increased in 2007 compared to the year 2003 with an annual growth rate of 1.52% over this period. T...

The objective of this study was to investigate the effects of the addition of different vegetable oils to the diet on the fermentation pattern and methane production in Rusitec fermenters. For this purpose four treatments were randomly allocated to sixteen fermenters in a completely random design. Inoculum was obtained from four ruminally fistulated Merino sheep fed lucerne hay and concentrate....

The effect of adding increasing levels (0, 25, 50 and 75 μl/75 ml buffered rumen fluid) of essential oils (EOs) to a basal substrate (50% roughage: 50% concentrate) on ruminal fermentation characteristics was evaluated in vitro by a semi automatic gas production (GP) technique. The EOs used were from Achillea santolina (AS25, AS50, AS75), Artemisia judaica (AJ25, AJ50, AJ75), Schinus terebenthi...

OBJECTIVE Gelidium amansii (Lamouroux) is a red alga belonging to the family Gelidaceae and is commonly found in the shallow coasts of many East Asian countries, including Korea, China, and Japan. G. amansii has traditionally been utilized as an edible alga, and has various biological activities. The objective of this study was to determine whether dietary supplementation of G. amansii could be...

The present study was conducted to evaluate the effect of different doses of the Sanguisorba officinalis tannin extract (SOTE) on in vitro methane production, rumen microorganisms and basic rumen fermentation parameters. SOTE contained 451 mg g-1 of total tannins was tested at different doses (0, 1, 4, 10, 20, 40 and 100 mg of SOTE per vessel; the input of tannins was 0, 1.3, 5.1, 12.8, 25.6, 5...

Anaerobic digestion (AD) has been applied over the years for the treatment of a wide variety of organic streams. The advantages of this process over other biological treatments relate mainly to the low cost of bioreactors operation, when compared to aerobic processes, since AD-based treatments offer a cost-effective solution for the treatment of high-strength organic wastes, through economic re...

Due to anaerobic conditions, peatland soils store globally significant amounts of carbon and are an important source of methane, a potent greenhouse gas. One component of anaerobic carbon cycling, homoacetogenesis (i.e., acetate formation from carbon dioxide and dihydrogen via the acetyl-CoA pathway), has rarely been quantified in natural environments because it is commonly viewed as being ther...

The production of hydrogen and methane by geochemical reactions associated with the serpentinization of ultramafic rocks can potentially support subsurface microbial ecosystems independent of the photosynthetic biosphere. Methanogenic and methanotrophic microorganisms are abundant in marine hydrothermal systems heavily influenced by serpentinization, but evidence for methane-cycling archaea and...