高寒山区旱作条件下细茎冰草生产性能测定

Report on productivity of Northern Wheatgrass Elymus trachycaulus in non-irrigation alpine mountain area

通过3年的测定结果表明,细茎冰草Agropyron trachycaulum cv Slender在青海东部农业区的高寒山区旱作条件下,可以安全越冬,越冬率为86%~90%,第2和3年的平均干草产量分别为3 856 6,5 386 7kg/hm2,籽实产量分别为897,1 150 kg/hm2,生育期133~140 d,属中、晚熟多年生优良禾本科牧草品种,适合在海拔为2 750 m左右的旱作条件下种植,具有良好的推广前景。

Results of a 3 year productivity-test trial in arid alpine mountain in eastern Qinghai showed that the northern wheatgrass had winter survival rate of 86%~90%, hay yield in second and third year were 3 856.6 kg/hm^2 and 5 386 kg/hm^2, seed yield were 897 kg/hm^2 and 1 105 kg/hm^2 respectively. Phonological season was 133-140 days; It was a mid-or late-growing forage species. The northern wheatgrass is adaptable to arid mountain of 2 750 meter altitude and is a promising species.