裹包密度和层数对天然牧草青贮饲料品质的影响

发布时间：2018-11-21 12:07

【摘要】：【目的】筛选天然牧草最佳裹包密度及裹包膜层数,为天然牧草裹包青贮提供科学依据。【方法】针对影响天然牧草裹包饲料饲用品质的裹包密度(200~250,250~300,300~350,350~400kg/m~3)和裹包膜层数(2,3和4层)2个因素设计试验,对不同处理天然牧草青贮饲料的营养指标(干物质(DM)、粗蛋白质(CP)、可溶性碳水化合(WSC)、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)、粗灰分(CA)、粗脂肪(EE)含量)及发酵品质(pH及乳酸(LA)、乙酸(AA)、丙酸(PA)、丁酸(BA)含量)进行分析。【结果】裹包密度为300~350kg/m3、裹包膜层数为4层的处理天然牧草青贮饲料DM、CP和WSC含量最高,分别为439.51,113.37和30.90g/kg,均显著高于其他处理;NDF、ADF和CA含量最低,分别为500.36,305.47和54.00g/kg,显著低于其他处理;EE和PA含量与其他处理差异不显著;pH值为4.69,显著低于其他处理;LA含量显著高于其他处理,为2.10mg/g,未检测到AA、BA。【结论】天然牧草在密度300~350kg/m3、添加2mL/kg丙酸的条件下进行4层裹包,所得的裹包青贮饲料品质较好。
[Abstract]:[objective] to screen the best inclusion density and coating number of natural forage grass. To provide scientific basis for natural forage inclusion silage. [methods] Design experiments were carried out according to two factors, namely, the inclusion density (200~250250~300300~350350~400kg/m~3) and the number of coating layers (2? 3 and 4), which affect the feed quality of natural forage inclusions. Nutrient Indexes of Natural forage silage with different treatments (dry matter (DM), crude protein (CP), soluble carbohydration (WSC), Neutral detergent Fiber (NDF), Acid detergent Fiber (ADF), crude Ash (CA), The content of crude fat (EE) and fermentation quality (pH and (LA), lactate (AA), propionic acid (PA), butyric acid (BA) were analyzed. [results] the inclusion density was 300,350 kg 路m ~ (-3), The contents of DM,CP and WSC in natural forage silage were 439.51113.37 and 30.90 g / kg, respectively, which were significantly higher than those in other treatments. The contents of NDF,ADF and CA were the lowest, 500.36305.47 and 54.00 g / kg, respectively, which were significantly lower than those of other treatments, the contents of EE and PA were not significantly different from those of other treatments, the pH value was 4.69, which was significantly lower than that of other treatments. The content of LA was significantly higher than that of other treatments (2.10 mg / g). There was no AA,BA. [conclusion] the natural forage had four layers of inclusion under the condition of density 300 ~ 350kg 路m ~ (3) and 2mL/kg propionic acid added, and the quality of inclusion silage was better.
【作者单位】：内蒙古农业大学草原与资源环境学院;鄂温克旗草原站;
【基金】：国家自然科学基金项目(31460638) 农业部公益性行业专项(201303061)
【分类号】：S816.53

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