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为快捷、有效地解决我省中西部地区杨树防护林的更新改造问题。我们在河北农大闰浚杰教授等人研究成果的基础上，开展了本项试验。１试验概况１．１试验地选设在榆树台机械林场东五家林班１５小班、徐家油坊林班３小班（见表１）。１．２供试材料。抗虫毛白杨种条来源于秦...
In order to quickly and effectively solve the poplar shelterbelt in the central and western regions of our province renovation and transformation. We conducted this experiment on the basis of the research results of Prof. JU Junjie from Hebei Agricultural University. 1 Test Overview 1.1 Experimental site selected Yushutai Machinery Farm East five Lin classes 15 small classes, Xujiafang Lin Class 3 small classes (see Table 1). 1.2 test materials. Insect-resistant poplar seed from Qin ...