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Figure 1. Effects of different foliages with drying methods on methane per g substrate at 24 hours of incubation |
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Reducing Greenhouse Gas Emissions from Livestock and Soils |
National Institite of Animal Science, Hanoi, Vietnam
Abstract
The objective of this study was to evaluate the effects of different tropical legumes foliages and drying methods of foliage substrates on the mitigation methane production in an in vitro incubation. The foliages of Acacia mangium (Aca), Flemingia macrophylla (Fle), Stylosanthes guianensis (Sty), Leucaena leucocephala (Leu) and Manihot esculenta Crantz (CaF) were dried according to the methods (room temprature (30oC, in 7 days), sun-dried (35oC, in 2 days), cold temperature ( - 870C, in 38 hours), heat temperature (1050C, in 5 hours) before mixture with cassava root meal (70%) and urea as the in vitro incubation substrates. Comparing the methanogenic potential, significant differences occurred within legumes and the drying methods. The methane to total gas produced ratio was lower for the foliages of Aca and Fle. Within the drying methods, the methane production from substrates drying with cold temprature method was highest, followed by sun-dried, room temprature and heat temprature. With increasing the temprature of drying (cold, -850C to heat, 1050C) of foliages substrates trends to decrease the methane production. The percentage of methane in the gas production from different drying methods of foliages increased with increasing of the incubation time.
Keywords:
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Figure 1. Effects of different foliages with drying methods on methane per g substrate at 24 hours of incubation |
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Figure 2. Effects of drying methods on methane content at different incubation time, hours |
