| This paper investigated the effect of mixed sugarcane tops and sugarcane with higher levels of WSC and mulberry leaves and broussonetia papyrifera leaves with higher levels of CP into silage.The mixed ratios of the two raw materials were 100%vs 0%and 75%vs.25%,50%vs 50%,25%vs 75%,0%vs 100%（based on fresh weight）,after the silage was completed,the fermentation quality of the silage and its nutrient composition were anlyzed,and the silage fermentation parameters and main microorganisms after aerobic exposure were also analyzed.The experiment results were as follows:Experiment 1:The effect of mixed silage of sugarcane tops and mulberry leaves on its silage qualityCompared with sugarcane tops silage alone,mixed with mulberry leaves increased the content of CP,lactic acid,acetic acid and propionic acid in the mixed silage（P<0.05）.Compared with mulberry leaf silage alone,mixed with sugarcane tops had a weaker effect on the p H value and NH3-N content of the mixed silage,but this could reduce the p H value and the growth rate of the number of yeasts after aerobic exposure,with the proportion of sugarcane tops in mixed silage increases.The results showed that,the mixed silage of 25%mulberry leaf and 75%sugarcane tops tended to improve the aerobic stability of the mixed silage.Experiment 2:The effect of mixed silage of sugarcane and mulberry leaves on its silage qualityCompared with sugarcane silage alone,mixed silage with mulberry leaves increased the DM,CP,acetic acid and propionic acid content of its mixed silage,and reduced ethanol content and silage loss（P<0.05）.Compared with mulberry leaf silage alone,mixed silage with sugarcane increased the lactic acid and acetic acid content of its mixed silage,reduced p H,NH3-N,butyric acid content and the number of Enterobacteria（P<0.05）,which significantly improved The silage quality of its mixed silage;when 25%mulberry leaves and 75%sugarcane were mixed silage,it could obviously inhibit the NH3-N production of the mixed silage after aerobic exposure,and could also promoted the production of acetic acid,and its silage quality was the best good.Experiment 3:The effect of mixed silage of sugarcane tops and broussonetia papyrifera leaves on its silage qualityCompared with the silage of sugarcane tops alone,the mixed silage of broussonetia papyrifera leaves increased the CP and acetic acid content of the mixed silage,increased the growth rate of acetic acid and propionic acid after aerobic exposure,and reduced the number of enterobacteria（P<0.05）.Compared with silage alone,mixed silage with sugarcane top increased the WSC content of its mixed silage（P<0.05）;when 25%broussonetia papyrifera leaves and 75%sugarcane top mixed silage,the mixed silage could be significantly reduced the p H value and NH3-N content of the mixed silages（P<0.05）.The results showed that,when mixed with broussonetia papyrifera leaves,more than 75%of the sugarcane tops could significantly improve the silage quality of the mixed silage.Experiment 4:The effect of mixed silage of sugarcane and broussonetia papyrifera leaves on its silage qualityCompared with sugarcane silage alone,the mixed silage with broussonetia papyrifera leaf reduced the ethanol content of the mixed silage（P<0.05）.Compared with broussonetia papyrifera leaf silage alone,mixed silage with75%sugarcane increased the CP,WSC,lactic acid and acetic acid content of its mixed silage,and at the same time reduced p H,NH3-N and butyric acid content（P<0.05）,and make the p H value of the mixed silage more stable after aerobic exposure,and at the same time greatly inhibited the growth of the number of molds.The results showed that,when mixed with broussonetia papyrifera leaves,the proportion of sugarcane at 75%could significantly improve the silage quality of the mixed silage.In summary,when mixed with mulberry leaves,the proportion of sugarcane not less than 25%could significantly improve the silage quality of the mixed silage;when mixed with broussonetia papyrifera leaves,the proportion of sugarcane not less than 75%could significantly improve the mixed silage. |
