藏北高寒区4种野生披碱草属牧草生产性能及品质差异  

Differences of Productivity and Quality of 4 Wild Elymus L. Species of Alpine Regions in Northern Tibet

作　　者：魏巍 WEI Wei(State Key Laboratory of Highland Barley and Yak Germplasm Resources and Genetic Improvement/Institute of Pratacultural Science,Tibet Academy of Agriculture and Animal Husandry Science,Tibet Lhasa 850000,China)

机构地区：[1]青稞和牦牛种质资源与遗传改良国家重点实验室/西藏自治区农牧科学院草业科学研究所,西藏拉萨850000

出　　处：《西藏农业科技》2019年第4期28-31,共4页Tibet Journal of Agricultural Sciences

基　　金：那曲抗寒牧草驯化和草牧业示范(XZ201901NA09);青藏高原羊八井、墨竹工卡社区饲草稳产提质关键技术研究(2018YFD0502402-02)。

摘　　要：本研究选取西藏2个海拔采集的垂穗披碱草(Elymus nutans Griseb)、甘肃天祝收集的麦宾草(Elymus tangutorum Nevski)和栽培品种同德短芒披碱草[Elymus breviaristatus (Keng) Keng f. cv. Tongde]为材料,通过分析4种披碱草属牧草的产量和品质性状,为筛选优质披碱草属育种材料提供依据。结果表明,那曲市种植披碱草属牧草第2年麦宾草的产量最高,为129. 2 kg/667m2;不同生育期粗蛋白、中性洗涤纤维、酸性洗涤纤维和粗脂肪含量分别介于8. 6%~14. 8%、46. 3%~62. 2%、27. 2%~59. 6%和1. 78%~2. 59%;通过灰色关联理论对乳熟期4种材料产量和品质指标进行综合分析,优劣顺序为麦宾草>工布江达垂穗披碱草=同德短芒披碱草>安多垂穗披碱草。In this study,we carried out the domestication experiment of Elymus nutans Griseb( Anduo),Elymus nutans Griseb( Gongbujiangda),Elymus tangutorum Nevski and Elymus breviaristatus( Keng) Keng f. cv. Tongde( control) for screening the high-quality primarily-native Elymu breeding materials. The result showed that the yield of( E. tangutorum) was the highest in the second year,which was193. 7 g/m2. The contents of crude protein( CP),neutral detergent fiber( NDF),acid detergent fiber( ADF) and crude fat( CF) of different growth period were 8. 6 %-14. 8 %,46. 3 %-62. 2 %,27. 2 %-59. 6 % and 1. 78 %-2. 59 %,respectively. The gray system correlation theory was used to comprehensively evaluate the productivity and nutrient quality of 4 Elymu species in milk ripening stage,the order was showed that Elymus tangutorum Nevski > Elymus nutans Griseb( Gongbujiangda) = Elymus breviaristatus( Keng) Keng f. cv.Tongde > Elymus nutans Griseb( Anduo).

关 键 词：藏北 驯化栽培 披碱草属 产量 品质 

分 类 号：S812[农业科学—草业科学]