Effects of Different Proportions and Fermentation Time on Fermentation Characteristics and Nutritional Value of Mixed Silage of Soybean Hull and Wheat Straw
In order to investigate the effects of different proportions and fermentation time on the fermenta-tion quality and nutritional value of mixed silage of soybean hull and wheat straw.In this study,soybean hulls and wheat straw were used as raw materials,and mixed silage with fresh weight ratio of 9.0∶1.0(group A),8.5∶1.5(group B),8.0∶2.0(group C)and 7.5∶2.5(group D).Sensory evaluation,pH,NH3-N and nutrient composition analysis of fermentation quality were carried out at 0,30,60 and 90 d of silage,respectively.At 0-30 d of silage,with the increase of the proportion of wheat straw,the content of dry matter(DM)and ADL of mixed silage showed an increasing trend,the comprehensive score of sen-sory evaluation and the content of crude protein(CP)showed a decreasing trend,and the content of pH,neutral detergent fiber(NDF),and acid deter-gent fiber(ADF)of mixed silage showed a decreas-ing and then increasing trend.With the prolonga-tion of fermentation time,the comprehensive score of sensory evaluation,pH,DM,Ash showed a decreasing trend,NDF,ADF,ADL showed a trend of increasing and then decreasing,and the content of CP showed a trend of decreasing and then increasing.The feeding value of mixed silage in group B was better than that in groups A,C and D.In summary,when the mixed silage of soybean shell and wheat straw was ensiled,the suitable ratio was 8.5∶1.5,and the fermentation time was 30 d.
soybean shellwheat strawmixed silagedifferent proportionsfermentation time
万方数据
维普
