本文根据杨树深栽中间试验协作组在北京市、内蒙赤峰、雁北、宁夏银川平原、山东临沂地区、甘肃张掖地区等地四年来的试验结果写成,总结了各地成功的经验、失败的教训以及科研的成果,其目的是为了加快推广这一有效的抗旱造林技术,使这项新技术转为生产力。 (1)杨树插干钻孔深栽造林技术(简称杨树深栽)是从意大利引进的一种抗旱造林方 According to the experimental results of four years of the experiment of planting deep-rooted middle-aged experimental group in Beijing, Inner Mongolia, Chifeng, Yanbei, Ningxia Yinchuan Plain, Shandong Linyi, Gansu and Zhangye, etc., the successful experiences, the lessons of failure and scientific research The aim is to speed up the promotion of this effective drought-resistant afforestation technology and turn this new technology into a productive force. (1) Poplar Drill Drilling Deep planting techniques (referred to as poplar deep planting) is introduced from Italy a drought afforestation