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五台青杨(Populus cathayana Rehd.)是我区的优良乡土树种之一,抗寒,生长快,树干通直,同时也是杂交育种的优良地理种源。它分布在东经113°40′—113°55′,北纬38°40′—39°的五台县清水河流域,该地的年平均气温4℃左右,大于10℃积温2000℃—2800℃,无霜期100天左右,最低气温30℃,最高气温25℃,年降雨量600毫米左右,相对湿度59%,海拨1100—1800米。解放以来由于人工引种,五台青杨
Populus cathayana Rehd. Is one of the finest native tree species in our region. It has the characteristics of cold resistance, fast growth and straight trunk. It is also an excellent geographic provenance for crossbreeding. It is located in the Qingshui River basin of Wutai County, with longitude 113 ° 40’-113 ° 55’and latitude 38 ° 40’-39 ° north. The annual average temperature is about 4 ℃, and the accumulated temperature above 10 ℃ is 2000 ℃ -2800 ℃. Frost-free period of about 100 days, the minimum temperature of 30 ℃, the maximum temperature of 25 ℃, annual rainfall of about 600 mm, relative humidity of 59%, 1100-1800 meters above sea level. Since the liberation of artificial introduction, five green young