Abstract: This experiment was conducted to study the effect of additives on quality of rice straw silage with conventional and low moisture,which would provide theoretical basis for producing high quality of rice straw silage.Six treatment groups which added fermented green juice(FGJ),glucose(GLU),cellulose(CEL),xylanase(XYL),compound enzyme(CEL+XYL,MIX)respectively and control groups(CON)were set up with conventional moisture(MC1)and low moisture(MC2)of rice straw silage.Each treatment was repeated 3times.The materials were ensiled at room temperature and opened 60days later.The fermentation quality and the chemical composition were analyzed.The results showed:①In the MC2silages,pH,DMR(dry matter reclaim)and WSC(water soluble carbohydrate)extremely significantly increased(P<0.01),and LA(lactic acid),AA(acetic acid)and AN(ammonia nitrogen)significantly decreased comparing with the MC1silages(P<0.05,P<0.01).②In the MC1silages,pH of FGJ,GLU and CEL significantly decreased(P< 0.05,P<0.01),WSC increased among those treatments except the XYL group(P<0.05,P<0.01),AN significantly decreased among those treatments except the CEL group(P<0.01),GLR(gas loss rate)of GLU significantly decreased comparing with the CON group(P<0.01).In the MC2silages,pH of all other five additive treatments significantly decreased(P<0.01),DMR and WSC of FGJ and GLU increased(P<0.05,P<0.01),AN of FGJ,GLU and CEL decreased comparing with the CON group(P<0.05,P<0.01).The results showed that the MC2silages had higher quality than the MC1silages.In the MC1silages and the MC2silages,all five additive treatments had significantly improve the quality of silages,especially the addition of GLU had the better effect both in conventional and low moisture ensiling.