旱作条件下冰草属5种牧草农艺性状的评价

摘要：为了筛选出优良的牧草材料用于寒冷的干旱与半干旱地区草地改良与建设，研究对不同来源冰草属Agropyron的5种牧草进行农艺性状评价比较。试验结果表明：所有供试材料均能完成全生育期，年均生育时间119124 d，越冬率高达93%以上；同时供试材料间各项测试性状也有显著差异。综合考虑鲜草、干草及种子产量等指标，供试的5种牧草中，采自河北的冰草A.cristatum表现第一，来自美国的细茎冰草A.trachycaulum表现第二，而来自山西的光穗冰草A.cristatum 、美国的沙生冰草A.desertorum、甘肃的蒙古冰草A.mongolicum表现一般。

Evaluation on the agronomic characters of five crested wheat grasses under rain-fed conditionl

In order to screen out high quality forage species/cultivar for the grassland construction and improvement in the cold arid and semi-arid areas,five crested wheatgrasses from different regions were used to evaluate their agronomic traits under rain-fed condition.The results indicated all the tested materials could complete whole growth period.The average growth days reached 119 days to 124 days.The winter survival rates reached as high as 93 %.There were some significant differences of all tested indexes.In terms of fresh weight,hay weight and seed production and other indicators comprehensively,the best one was Agropyron cristatum collected from Hebei,the second was A.trachycaulum from America,the other three materias including A.cristatum var.pectiniforme form Shanxi,A.desertorum from America,A.mongolicum from Gansu did not perform very well.