耐寒新品种青海草地早熟禾的选育

Breeding of a New Variety Poa pratensis L.cv. Qinghai for Tolerance to Low Temperature

青海草地早熟禾是青海省畜牧兽医科学院从海拔4000m的达日县生长的野生种经多年栽培驯化而成的一个栽培品种,具有抗逆性极强、叶量丰富、适口性好、根茎发达、耐牧性强等优良特性。在海拔3800m的大武地区旱作条件下种植,第2～4年平均可产青干草6564kg/hm2,产籽323.7kg/hm2,青海草地早熟禾含有丰富的蛋白质,花期粗蛋白质含量12.68%,比冷地早熟禾高2.04%。

A new variety Poa pratensis L.cv.Qinghai,was bred from several wild materials growing in alpine regions with 4000m attitude in Dari county through planting and domestication for many years by Qinghai Academy of Animal Science and Veterinary Medicine.It showed some good traits including high resistance ability,humorous leaves,fine palatability,developed rhizome and tolerance to grazing et al.The average hay and seed yield of the new variety from the second year to the fourth year was 6564kg/hm2,and 323.7kg/hm2 separately at the 3800m altitude of Dawu county under dry farming system.The Poa pratensis L.cv.Qinghai was rich in crude protein which is 12.68% at flowering period,higher by 2.04% than that of Poa crymophila.