Effects of additives on silage quality and in vitro digestibility of Ruthenia medic silage

To determine the effects of two commercial inoculums on ensiling characteristics and in vitro digestibility of Ruthenia medic silage, an experiment was conducted with three treatments and a CK and with three replicates using a randominized complete block design. The three treatments were LaLsIL Dry（LD） 0.001%, SG 0.1%)and SG 0.2%.The materials were fermented for 90 days and then the quality of silages was assayed. The results showed that content of butyric acid was low, and direct ensiled russian fenugreek was considered as excellent by the classification standard of Vscore. No significant change in fermentation quality and digestibility in vitro was found in the treatment with LD. Lactic acid, crude protein and IVDMD of the treatment with SG 0.2% increased (P0.05), but NH3-N decreased (P0.05). The results indicated that SG enhanced the ferment ability of lactic acid bacteria, and depressed other microbe to decompose crude protein. It seems that digestibility of dry matter and crude protein in vitro decreased after fermentation.