美国蓝茎冰草、中间偃麦草、高冰草引种试验

2001年中国农业科学院兰州畜牧与兽药研究所由美国引进3种旱生栽培牧草（美国蓝茎冰草Agropyron smithii、中间偃麦草Elytrigia intermedia、高冰草A. elongatum）在甘肃兰州种植，对其进行了引种驯化和种子繁殖。2002-2004年完成了半干旱地区的区域试验和品比试验。试验结果表明：3种引进牧草能够适应当地气候条件，具有抗旱、耐寒、产草量高和耐粗放管理的优良性状。2003年青草产量51 522.0～66 031.5 kg/hm2，与对照中产量最高的蒙古冰草A. mongolium相比，高于对照49.2%～91.3％；种子产量低于对照。

Introduction experiment of American smith elytrigia, intermediate wheatgrass and tall wheatgrass in Lanzhou, Gansu

American smith elytrigia,intermediate wheatgrass and tall wheatgrass were the xeric forage cultivars introduced from the United States in 2001.The regional test and cultivar comparison test in the semi-arid regions from 2002 to 2004 were finished.The results indicated that three cultivars could adapt to the local climate conditions,and performed drought tolerance,cold resistant,high grass yield and low cost management.The fresh grass yield was ranged from 173.4 to 226.7 kg/hm2,which was 13% to 47.8% higher ...