摘要
试验旨在研究不同比例和发酵时间对毛豆壳、小麦秸秆混合青贮饲料的发酵品质及其营养价值的影响.试验以毛豆壳和小麦秸秆为原料,按鲜重比9.0∶1.0(A组)、8.5∶1.5(B组)、8.0∶2.0(C组)、7.5∶2.5(D组)混合青贮,分别在青贮0、30、60、90 d进行发酵品质的感官鉴定、pH、氨态氮(NH3-N)及营养成分分析.青贮0～30 d时,随着小麦秸秆比例的增加,混合青贮的干物质(DM)、酸性洗涤木质素(ADL)的含量呈现上升趋势,感官评价综合得分、粗蛋白(CP)的含量呈现降低趋势,混合青贮饲料的pH、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)的含量呈现先下降后升高的变化趋势.随着发酵时间的延长,感官评定综合得分、pH、DM、Ash呈现下降趋势,NDF、ADF、ADL呈先升高后下降趋势,CP含量呈先下降后升高趋势.B组混合青贮饲料的饲用价值优于A、C、D组.综上可知,毛豆壳和小麦秸秆混合青贮时,其适合的比例为8.5∶1.5,发酵时间为30 d较为适宜.
Abstract
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.
国家科技期刊平台
NSTL
维普
万方数据