The Effect Of Different Silage Additives On Dregs After Extracting Leaf Protein From Alfalfa Silage Quality

The experiments selected dregs after extracting leaf protein from Medicago sativa of the second years as materials,and designed by randomized-single factor. The effects on the quality of the material at different ensiling time through adding different additives:formic acid at a rate of 1%,2%;molasses at a rate of 5%,10%;Third acid at a rate of 1%,2% were studied. The results showed :1)All treatments'DM digestibility and OM digestibility are higher than material(p<0.01). 2) The content of protein in the molasses of 5% group and the control group decreased significant(p<0.05). 3) On the four days ,formic acid addition declined the pH value ,compared with the control (p<0.01); the content of Ammonia nitrogen also decreased with the control (p<0.01). The low adding of formic acid advanced LAB,but high adding of formic acid prevented LAB growth .On four days ,the production of lactic acid declined significant (p<0.01), and the content of VFA also decreased compared with the control . 4) With the increasing of molasses adding ,on four days ,the pH value is lower than the control (p<0.01); the content of ammonia nitrogen and ADF also decreased significant (p<0.01); but the production of lactic acid increased compared with the control(p<0.01);the content of VFA also improved significant(p<0.01). 5) On the four days , Third acid addition declined the pH value , the content of ammonia nitrogen , lactic acid and VFA significant(p<0.01). 6) Analyze the effect by different additives synthetically, formic acid at a rate of 1% is the best one, following are formic acid at a rate of 2%, third acid at a rate of 1%, third acid at a rate cf 2%,molasses at a rate cf 10%,molasses at a rate of 5%,and control treatment.