杨树速生,成材早,用途广泛,种植杨树经济效益较高,是宁夏回族自治区重要的造林树种。要种好杨树,必须遵循科学规律,处理好以下几项关键技术问题。一、选好品种1.适地适品种。要综合考虑品种的适应性、栽培区域的自然条件和造林地的立地条件,使品种特性与环境条件相匹配,杨树良种才能发挥其优良特性,实现速生丰产。2.提倡多无性系(多品种)造林。如果无性系(品种)单一,林木的遗传性单一,其群体的遗传基础狭窄,当病虫害发生和环境产生变化时,它们的抵抗力和适应力较差。因此,应该实行多无性 Poplar fast-growing, ready-made early, wide range of uses, poplar cultivation of high economic efficiency, Ningxia Hui Autonomous Region is an important afforestation tree species. To planted poplars, we must follow the laws of science, handle the following key technical issues. First, choose a good variety 1. Suitable for species. To take into account the adaptability of varieties, the natural conditions of cultivation areas and site conditions of afforestation, so that the characteristics of varieties and environmental conditions to match the poplar varieties can play its excellent characteristics, to achieve fast-growing and high yield. 2. To promote multi-clonal (multi-species) afforestation. If the clones (cultivars) are single, the heritability of trees is single, their genetic basis is narrow, and their resistance and resilience are poor when pests and diseases change and the environment changes. Therefore, asexuality should be practiced