Effect Alfalfa On Chacteritics Of Gas And Ferment Of Forage

The study was the determination of in vitro fermentation and gas production characteristics of 5 forages.And influence of in vitro fermentation and gas production characteristics when alfalfa addition to ryegrass,wheatstraw,cornstalk,cornsilage. The results of experiment showed that 5 sorts of roughages affected gas production at 12h,24h,48h,gas permeters,a,b,a+b,c,degradability of DM, NDF at incubated time 48h significantly(P<0.01).And alflafa's degradability of DM washigherthanryegrass,cornsilage,cornstalk,wheatstraw.alfalfa'sdegradability of NDF was higherthanryegrass,cornsilage,cornstalk,wheatstraw.5 forges significantly affected ruminal pH,NH₃-N at the end of 48h(p<0.01).Addition of alflafa significantly affected gas productin at 12h,24h,48h and gas permeters a,b,a+b,candDM,NDFdegradability among forage(P<0.01).DM,NDF degradability increased with the addition of alfalfa,and was higher than no addition the addition of alfalfa to ryegrass significiantly affected combinational effect of gas production at 12h,48h.For 24h,addition 25%,50% of combinational effect wasgreater(P<0.05),but 75% was no significiant. Combinatinal effect for gas was increased with addition of alfalfa.At the hand of DM degrdability,the addition of alfalfa was no significiant,but for NDF degradabiltiy,addition of 25%,50% was significiant,and 75% was greater.For DM,NDF degradability ,75% was higher than 25%,50%.The addition of 25% alfalfa to wheatstraw was no different gas production but 50% was significiant(P<0.05),75% was greater(P<0.01) at 12h. gas at 24h,48h,and DM,NDF degradability were significiant with the addition of alfalfa to wheatstraw (P<0.05).Combinational effect for gas,DM or NDF degradability was increased with addition,and 75% was highest.The addition of alfalfa to cornstalk significiantly affected combinational effect of gas...