The effects of different chemical additives on the nutritional composition,fermentation quality,and microbial quantity of silage corn
This experiment aims to investigate the effects of different chemical additives on the nutritional composition,fermentation quality,and microbial quantity of silage corn.The experiment selected corn straw harvested from the same batch and chopped into 1～2 cm pieces.The experiment was divided into four groups,with the control group sprayed with clean water,and the other three groups sprayed with an equal amount of fermentation inhibitors(hydrochloric acid,formic acid,acetic acid)of 8 mL/kg,respectively,and recorded as the hydrochloric acid group,formic acid group,and acetic acid group.After 30 days of vacuum ensiling at room temperature,take three small samples from the middle part of the silaged corn for testing.Result:(1)Compared with the control group,the crude protein content of silage corn in the hydrochloric acid group,formic acid group,and acetic acid group was significantly increased(P＜0.05),while the acid washing fiber content of silage corn in the acetic acid group was significantly reduced(P＜0.05).(2)Compared with the control group,the pH value and ammonia nitrogen content of silage corn in the hydrochloric acid group,formic acid group,and acetic acid group were significantly reduced(P＜0.05),while the lactate content was significantly increased(P＜0.05).The acetic acid content of silage corn in the acetic acid group was significantly increased(P＜0.05).(3)Compared with the control group,the number of lactic acid bacteria in the hydrochloric acid group,formic acid group,and acetic acid group of silage corn significantly increased(P＜0.05),while the number of yeast bacteria significantly decreased(P＜0.05).The number of aerobic bacteria in the acetic acid group of silage corn significantly decreased(P＜0.05).Conclusion:Under the conditions of this experiment,different chemical additives can improve the nutritional composition,fermentation quality,and microbial structure of silage corn.Among them,using an equal amount of acetic acid as a fermentation inhibitor has the best effect.
chemical additivessilage cornnutrient compositionfermentation qualitymicrobial quantity
NETL
NSTL
万方数据
维普
