不同类型黑麦草营养价值评估  

Evaluation of nutritional value of different types of ryegrass

作　　者：王海英[1] WANG Haiying(Puyang Vocational and Technical College,Puyang,Henan Province 457000,China)

机构地区：[1]濮阳职业技术学院,河南濮阳457000

出　　处：《中国饲料》2021年第8期13-16,共4页China Feed

摘　　要：文章旨在通过体内外试验评估不同类型黑麦草的营养价值。试验选择平均体重为(66.87±2.34)kg的绵羊12头,随机分成3组,每组4个重复,每个重复1头。3组绵羊分别饲喂新鲜、青贮和晒干黑麦草。经过14 d的饲养试验后收集粪便和牧草样品进行后续分析。结果:晒干黑麦草的干物质、有机物和无氮浸出物含量均表现最高(P<0.05)。新鲜黑麦草粗蛋白质和半纤维素含量较青贮黑麦草分别显著提高42.10%和10.82%(P<0.05)。青贮黑麦草粗脂肪、粗纤维、中性洗涤纤维和酸性洗涤纤维含量显著高于其他两种类型的黑麦草(P<0.05)。新鲜、青贮和晒干黑麦草的粗蛋白质、粗脂肪和粗纤维表观消化率无显著差异(P>0.05)。晒干黑麦草干物质表观消化率较新鲜和青贮黑麦草显著提高6.34%和6.21%(P<0.05),同时晒干黑麦草有机物表观消化率较新鲜黑麦草显著提高6.65%(P<0.05),无氮浸出物表观消化率较青贮黑麦草显著提高15.44%(P<0.05)。当体外代谢能值以MJ/kg有机物表示时,新鲜和青贮黑麦草代谢能值较晒干黑麦草分别显著提高21.34%和22.41%(P<0.05),而当体外代谢能值以MJ/kg干物质表示时,新鲜黑麦草能值最高,青贮黑麦草能值次之,晒干黑麦草能值最低(P<0.05)。结论:新鲜、晒干和青贮黑麦草在不同营养成分上各有优势,但3种牧草主要营养物质的表观消化率和代谢能值无显著差异。因此,无论是新鲜、晒干还是青贮黑麦草都可以作为反刍动物粗饲料的良好来源。The aim of the trial was to evaluate the nutritional value of different types of ryegrass in vitro and in vivo.Twelve sheep with an average body weight of 66.87±2.34 kg were randomly divided into 3 groups with 4 replicates per group and 1 sheep per replicate.Sheep in three groups were fed fresh,silage and sun-dried ryegrass respectively.After a 14-day feeding experiment,feces and forage samples were collected for subsequent analysis.RESULTS:The contents of dry matter,organic matter and nitrogen-free extract in sun-dried ryegrass were the highest(P<0.05).The crude protein and hemicellulose contents of fresh ryegrass were significantly increased by 42.10%and 10.82%compared with those of silage ryegrass(P<0.05).The contents of crude fat,crude fiber,neutral detergent fiber and acid detergent fiber in silage ryegrass were significantly higher than those in the other two types of ryegrass(P<0.05).There were no significant differences in apparent digestibility of crude protein,ether extract and crude fiber among fresh,silage and sun-dried ryegrass(P>0.05).The apparent digestibility of dry matter of sun-dried ryegrass was significantly increased by 6.34%and 6.21%compared with that of fresh and silage ryegrass(P<0.05),the apparent digestibility of organic matter of sun-dried ryegrass was significantly increased by 6.65%compared with that of fresh ryegrass(P<0.05),and the apparent digestibility of nitrogen free extract was significantly increased by 15.44%compared with that of silage ryegrass(P<0.05).When the in vitro metabolism can value expressed in MJ/kg organic,fresh and silage ryegrass metabolism can value the dried ryegrass significantly increased by 21.34%and 22.41%respectively(P<0.05),while in vitro metabolic energy values expressed in MJ/kg of dry matter,fresh ryegrass can value the highest performance,silage ryegrass can value times,dry perennial ryegrass can value the lowest(P<0.05).Conclusions:Fresh ryegrass,sun-dried ryegrass and silage ryegrass have advantages in different nutrients,but there are no signific

关 键 词：黑麦草 青贮 营养价值 消化 

分 类 号：S816.5[农业科学—饲料科学]