초록
<P><B>Abstract</B><P>Livestock, as part of agriculture sector, has contribute to greenhouse gas (GHG) emission especially on methane (CH4) compounds. Methane emission represent energy losses in form of gas reflecting low feed efficiency. Rice straw is a source commonly used as animal roughage. The quality of rice straw could be improved by fermentation treatment. This study investigated effects of fermentation using <I>Phanerochaete chrysosporium</I> and <I>Trichoderma viride</I> inoculant on <I>in vitro</I> gas and methane emission from rice straw. The rice straw was fermented in three weeks. This experiment consisted of four treatments and three replications being: (1) C (control, fermented rice straw with no inoculant), (2) TV (fermented rice straw using <I>T. viride</I> inoculant), (3) PC (fermented rice straw using <I>P. chrysosporium</I> inoculant), (4) TVPC (fermented rice straw using <I>T. viride</I> and <I>P. chrysosporium</I> inoculant). This research was arranged into a completely randomized block design. Results showed that TVPC treatment produced the lowest lignin content (<I>p&lt;0.05</I>). TVPC treatment also produced the highest glucose compound by 1.70 mg/g (<I>p&lt;0.05</I>). Meanwhile, there was no difference between all treatments in <I>in vitro</I> total gas and optimum gas (a+b) production. However, adding <I>T. viride</I> combination with <I>P. chrysosporium</I> in fermented process could decrease methane gas production (P&lt;0.01). Results demonstrate that adding <I>T. viride</I> and <I>P. chrysosporium</I> inoculant in fermented process could increase the efficiency of rice straw as ruminant’s feed. This was represent in the low methane production and could reduce a part of GHG emission from enteric fermentation.</P></P>