Quality of the mixed silage of forage rape and alfalfa
In order to provide theoretical data and technical support for the practical application of forage rape,this experiment selected forage rape(Brassica napus L.)and alfalfa(Medicago Sativa L.)during full flowering period as raw materials to explore the effects of mixed silage on its nutrition and fermentation quality.Silage materials were mixed according to the ratio of fresh weight 0∶10,3∶7,5∶5,7∶3 and 10∶0.The silage cans were opened at 5,10,20,40 and 60 days after ensiling to determine the dynamic changes of fermentation index and nutrient content.The re-sults showed that the overall quality of forage rape and alfalfa silage alone was poor.With the increase of alfalfa ad-dition ratio,the sensory quality score of mixed silage gradually improved.The contents of crude protein,soluble car-bohydrate and lactic acid of mixed silage increased to varying degrees,while the pH value,NH3-N/TN and butyric acid content decreased to a certain extent.It is better to mix and store forage rape and alfalfa at a ratio of 3∶7.At 60 days of fermentation,the pH value(3.95)and a NH3-N/TN(4.16%)content were significantly lower than those in the control group(P<0.05),and lactic acid(96.46g·kg-1DM)was significantly the highest(P<0.05).The V-score was good(80.07)and the membership function value was the highest(0.7649),which could be used as the appropri-ate proportion scheme for mixed silage of forage rape and alfalfa.
万方数据
维普
