The Effect Of Applying Sodium Acetate Compounds On The Quality And Aerobic Stability Of Silage

Sodium Diacetate (SDA) and Sodium Dehydroacetate are two new-model preservatives. SDA is widely applied to food, cereal crops and forages etc., and Sodium Dehydroacetate is mainly used in food. In the current study, the two additives were applied to silages to suppress re-fermentation by inhibiting the growth of deteriorating bacteria, and to conserve the nutritional value of silages maximally. By the positive comparison with silages treated with fermentation-inhibiting additive (LuproMix NC), and by the negative comparison with the control, the effect and applicability of the two additives are evaluated as per the silage quality scoring system normally used in China.The study included two tests. Test one was Additive Rate Selection Test. In this test, Canada Bluegrass harvested from the schoolyard was ensiled in bag after SDA treatment or Sodium Dehydroacetate treatment, at three different rates separately. The silages treated with SDA and the silages treated with Sodium Dehydroacetate at different rates were compared with the control and LuproMix NC treated silages. The indicators measured included pH value change, NH3-N change, LAB concentration, and silage deteriorations etc during fermentation of silages. Through the comprehensive comparison of silage quality and cost etc, the optimal applying rates of SDA and Sodium Dehydroacetate were selected separately as additive for Corn Silage Test. Test two was Corn Silage Test. In this test, whole-plant corns were ensiled in bale, after SDA treatment or Sodium Dehydroacetate treatment at the rate selected through the first test, and the rate of LuproMix NC were the same to that used in the first test. The sensory characteristics and fermentation quality of the silages were evaluated during and after ensiling.The study results showed: for Sodium Dehydroacetate treatments, in Test one, the silages treated with Sodium Dehydroacetate at each rate all had better quality than the control, and the effect of applying Sodium Dehydroacetate became greater with the increment of applying rates. And in Test two, the sensory characteristics, moisture content and pH value of the silages treated with Sodium Dehydroacetate reached the level of high-quality silage, number of LAB increased, and numbers of molds and yeasts were only 1/100 of that in the control, the difference of VBN/TN from the control was significant (P<0.05), and the difference of VBN/TN from LuproMix NC treated silages was very significant (P<0.01). The ratio of lactic acid to total acid was 6.64% higher than the control. Butyrate concentration was zero. Scoring the fermentation quality, all the indicators were full scores. The aerobic stability of the silages was greatly improved and the loss of...