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“毛白杨速生丰产栽培技术的研究”是山东省科委1986年下达,由山东省林科所承担的课题。1993年5月22日山东省林业厅受省科委的委托,邀请专家进行了验收。验收测试结果表明:5年生河北易县雌株毛白杨林平均胸径达到18cm,平均树高达到13.6m,实现了毛白杨早期丰产的目标。不同栽培措施试验林效果显著,其中4年生施肥试验林平均胸径12.6cm,平均树高10.2m,是对照林的2.06倍
“Populus fast-growing and high-yield cultivation techniques” is the Shandong Provincial Science and Technology Commission issued in 1986 by the Shandong Provincial Forestry Branch assumed the task. May 22, 1993 Shandong Provincial Forestry Department commissioned by the Provincial Science and Technology Commission, invited experts for acceptance. Acceptance test results show that: 5-year-old female plantation in Yixian, Hebei Province, the average diameter at breast height up to 18cm, the average tree height up to 13.6m, to achieve the goal of early poplar high yield. Different cultivation measures have significant effect on the experimental forest, in which, the average DBH of the 4-year fertilization trial forest is 12.6cm and the average tree height is 10.2m, which is 2.06 times of that of the control forest