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青海省西宁市位于青藏高原的北部,海拔2,261米,属大陆性气候。日照时数2,682左右,年平均温度5.6℃左右,最高30.6℃,绝对最低-26.6℃,无霜期短,日夜温差较大。冬春干旱多风,全年降雨400毫米左右。河北杨(Populus hopeiensis Huet Chow)在此气候条件下,1年生苗高达150厘米,地径1.25厘米;13年生高达15.90米,胸径21.30厘米,生长健壮,长势喜人,适宜于大力推广。为了多快好省地培育良种壮
Xining City, Qinghai Province is located in the northern part of the Qinghai-Tibet Plateau, 2,261 meters above sea level, a continental climate. Sunshine hours 2,682 or so, the annual average temperature of about 5.6 ℃, the highest 30.6 ℃, the absolute minimum -26.6 ℃, frost-free period is short, large temperature difference between day and night. Arid and windy winter and spring rainfall of about 400 mm throughout the year. Populus hopeiensis Huet Chow Under this climatic condition, one-year-old seedling is up to 150 centimeters in diameter and 1.25 centimeters in diameter. The 13-year-old is up to 15.90 meters in diameter and has a diameter at the breast of 21.30 centimeters. It grows well and grows favorably and is suitable for promotion. In order to cultivate good varieties of strong and strong