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河北杨,土名叫串杨或白达杨,在我县半风沙区和丘陵沟壑区多为萌蘖次生幼林,小片状分布。河北杨具有适应性强、根蘖能力强的特性。据在塔湾公社梨树塔生产队幼林调查,12年生树高9.22米,年平均生长量为0.77米;胸径6.9厘米,年平均生长量为0.58厘米(64年9月树干解析)。一株母树砍伐后一年在400平方米的面积内生根蘖苗425株,平均每平方米1株多。
Hebei Yang, soil named string or poplar, semi-sand area in my county and hilly and gully area mostly young secondary forest of sprouts, small pieces of distribution. Hebei Yang has strong adaptability, strong ability of root tillers. According to the survey of young trees in the production team of pear tree tower in Tawan commune, the 12-year-old tree height is 9.22 meters with an average annual growth of 0.77 meters and a breast diameter of 6.9 centimeters with an average annual growth of 0.58 centimeters (trunk analysis of September 64). One year after the felling of a mother tree, there were 425 endophyte tillers in an area of 400 square meters, with an average of more than 1 plant per square meter.