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辽宁省是我国杨树速生主要产区之一,建昌一带又是我省杨树分布比较集中的地方。建昌杨树(小青杨)的特点是:生长快。树干通直高大、树皮光滑美观、生势非常旺盛。建昌杨树林是在1950年春用埋干法营造的。于1959年4月24日调查。该林生长特别旺盛,林分平均胸径达12.4厘米,平均高为13.20米,生长最快的树木胸径已达18.3厘米,树高为14.5米。造林时的株行距为2.5×1.5米,每公顷应有2666株,但由于有一部
Liaoning Province is one of the main producing areas for poplar fast growing in China. Jianchang area is also the poplar distribution area in our province. Jianchang poplar (Xiao Qing Yang) is characterized by: fast growth. Trunk straight tall, bark smooth appearance, the potential is very strong. Jianchang poplar was buried in the spring of 1950 to create dry. On April 24, 1959 investigation. The forest is particularly strong growth, the average diameter of 12.4 cm forest average height of 13.20 meters, the fastest growing tree diameter has reached 18.3 cm, height of 14.5 meters. Planting line spacing of 2.5 × 1.5 meters, should have 2666 plants per hectare, but because there is a