摘要
沙尔套山天然草地植物种类多,牧草资源丰富,尤其是禾本科牧草,其在草地植被组成中和放牧家畜日粮构成上占据着重要的地位。本研究通过对沙尔套山天然草地中占优势地位的9种禾本科牧草的生长特征及适口性进行观测,并运用灰色关联度分析法对其营养价值进行综合评定。结果显示,1)9种禾本科牧草可划分为旱生、旱中生和中生3种水分生态类型,密丛型、根茎型、根茎疏丛型和疏丛型4种分蘖类型,特别喜食、喜食和愿食3种适口性级别。2)9种禾本科牧草营养价值的综合评定由高至低的排列次序是鸭茅(Dactylis glomerata)>垂穗披碱草(Elymus nutans)>新疆鹅观草(Roegneria sinkiangensis)>圆柱披碱草(Elymus cylindricus)>细叶早熟禾(Poa angustifolia)>短芒短柄草(Brachypodium pinnatum)>假梯牧草(Phleum pratense)>针茅(Stipa capillata)>芨芨草(Achnatherum splendens)。
The natural grassland vegetations of Shaertao Mountain were abundant which reserved rich forage resources,especially the gramineous which occupied the important position and provided the diet for grazing animals.In the present study,the growth characteristics and palatability characteristics of nine gramineous grasses which were dominant in natural grassland vegetations of Shaertao Mountain were measured and the nutritional values were evaluated by the grey correlation analysis method.The result showed that nine dominant gramineous grass were divided into three water ecological types(xerophyte,xero-mesophyte and mesophyte),four tillering types(dense cluster type,rhizomatous,rhizomes-laxifruticose,laxifruticose),three palatability levels(specially favorite to eat,favorite to eat,wanted to eat).Nine dominant gramineous grass nutritive value of the order was Dactylis glomerata>Elymus nutans>Roegneria sinkiangensis>Elymus cylindricus>Poa angustifolia>Brachypodium pinnatum >Phleum pratense>Stipa capillata>Achnatherum splendens.
出处
《草业科学》
CAS
CSCD
北大核心
2014年第11期2141-2147,共7页
Pratacultural Science
基金
国家公益性(农业)行业专项"放牧牛羊营养均衡需要研究与示范"(201303062)
关键词
禾本科牧草
生长特征
营养价值
灰色关联度
gramineous forage
growth characteristics nutritive
grey correlation