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河北杨(Populus hopeiensis Hu et Chow)具有生长迅速、耐寒、耐旱、耐贫瘠、根系发达、萌蘖力强等特性,是西北、华北的黄土丘陵和风沙区的优良造林树种之一.河北杨均为雌株,不能用种子繁殖,但扦插育苗生根困难,成活率很低,限制了这一优良乡土树种的迅速发展.为了解决河北杨的繁殖问题,我们从1978年开始研究以来,已取得了重要进展.最近五年扦插成活率已稳定在90%左右,同时经过在陕西、宁夏等地推广试验,成活率亦均在80%以上.本文就有关研究成果及技术要点简报如下:
Populus hopeiensis Hu et Chow is one of the excellent afforestation species in loess hilly and sand-blown area of northwestern and northern China with characteristics of rapid growth, cold tolerance, drought tolerance, poor resistance, developed root system and strong sprouting ability. Are female plants, can not be used for seed multiplication, but cutting seedling rooting difficulties, survival rate is very low, limiting the rapid development of this excellent native tree species.In order to solve the breeding of Hebei poplar, we started in 1978, has been made An important progress in the past five years the survival rate of cuttings has stabilized at about 90%, while in Shanxi, Ningxia and other places to promote the test, the survival rate is also above 80% .This paper on the research results and technical briefings are as follows: