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我所从1980年开始进行杨树速生丰产林栽培研究,并进行中试,到1986年已营造小钻类杨树速生丰产林两千余亩,均长势良好。1981年栽植的彰武小钻杨速生丰产林,6年生平均树高达13.63米,年均2.27米;平均胸径21.24厘米,年均3.54厘米,单株材积0.24立方米。我们采取的主要技术措施是:1.认真选地,深耕细耙.选用通气性好,地下水位较浅,并具有一定肥力的地块造林。河川滩地较好,四旁空地也可以。栽植的前一年雨季或秋季整地,耕深25—30
Since 1980, I started poplar cultivation of fast-growing and high-yielding forests and conducted pilot tests. By 1986, more than 2,000 mu of quick-growing and high-yield poplar small drillings have been established, both of which are in good growth. 1981 planted Zhangwu small drill fast-growing high-yield forest, 6-year-old average tree up to 13.63 meters, an average of 2.27 meters; average diameter 21.24 cm, an average of 3.54 cm, single volume 0.24 cubic meters. We take the main technical measures are: 1. Carefully selected, deep plowing fine rake selection of good ventilation, shallow water table, and have some fertility plots afforestation. River beach is better, four open space can be. Planting the rainy season the previous year or fall preparation, plowing 25-30