文档介绍：Sorghum Silage 高粱青贮 Ellen R. Jordan, ., PAS, ACAN Professor and Extension Dairy Specialist and Ted McCollum III, PhD, PAS, ACAN Professor and Extension Beef Specialist Ellen R. Jordan 美国德克萨斯州农工大学教授奶牛推广专家? Alternative to corn silage 替代玉米青贮? Sustained production in drought conditions 在干旱环境中产量稳定? Delayed planting due to weather or as double crop 因天气或两熟耕作延迟播种? More efficient water utilization 更高效的水资源利用? High biomass yields 生物产量高? Digestibility generally is less than for corn silage, which has less lignin and more grain; thus 消化率一般低于玉米青贮, 因为低木质素,更多的籽粒;因此? Reduced fiber digestion 纤维的消化率降低? Reduced DMI 干物质采食量降低? Less milk produced 牛奶产量减少 Why Consider Sorghum Silage? 为什么考虑高粱青贮? ? Generally less lignin and perhaps altered lignin position 一般木质素较低,并且可能改变了木质素的化学成分? Greater NDF digestibility 中性洗涤纤维的消化率更高 Brown Midrib (BMR) Genotypes BMR 基因型 Silage/Hay/Roughage in Beef and Dairy Diets 奶牛和肉牛日粮中的青贮、干草和粗料? Physical properties of the diet 日粮的物理特性? Nutritional properties of the diet 日粮的营养特性 Forage/Roughage Inclusion in Dairy and Beef Diets 奶牛和肉牛日粮中的粗饲料比例 Stokes, 2002 粗饲料精料泌乳牛青年牛犊牛育肥肉牛 Role of Forage (Fiber) in Production Diets 粗饲料(纤维)在生产日粮中的作用粗料在日粮干物质中占比营养性的功能性的营养性或功能性的重要程度 0 100 0 100 Importance of Nutrition or Function % Forage/Roughage in Diet DM Nutritional Functional Role of Forage (Fiber) in Production Diets 粗饲料在生产日粮中的作用 Feedlot finishing 牧场育肥牛 Grower 犊牛 Beef Cow 肉牛 Dairy Lactation 泌乳牛粗料在日粮干物质中的占比营养性的功能性的营养性或功能性的重要程度? Moisture source in ration 日粮中的水分来源?“Coarse” fraction 粗粮部分? Gut health and foot soundness 肠道和蹄部健康? Milk fat test 乳脂率测定? Energy source 能量来源? Protein source 蛋白来源? Energy intake limiter –dilution and fill 能量摄入限制–稀释和填充 Acceptable position depends on need(s) for the diet 可接受的粗饲料成分取决于日粮的需求 Silage/Hay/Roughage in Beef and Dairy Diets 肉牛和奶牛日粮中的青贮、干草和粗料 Forage Energy 粗饲料能量 CHO Fiber 纤维 Non -Fiber 非纤维 Cellulose 纤维素 Hemicellulose 半纤维素 Lignin 木质素 Sugars 糖 Starches anic acids 有机酸(Structural 结构上的) (Non -Structural 非结构上的) Fi