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杨树是我国北方平原地区重要速生用材树种之一。在毛主席革命路线指引下,北方平原地区以杨树等速生树种为主的四旁绿化和农田林网化发展很快,将逐步成为我国木材生产的重要基地之一。但是,目前杨树栽培技术和木材产量与先进水平相比,还有很大差距,主要是现代良种推广较慢,造林密度过大,经营管理粗放,造成不少“小老树”和低产林,严重影响木材产量和防护效益的发挥。现根据国内外正反两方面的经验,提出杨树速生丰产的主要技术要点如下: 一、选择杨树良种经多年选育和栽培试验初步鉴定适合加速推广的有以下杨树良种: 1.早期特别速生,但材质较差的品种,如沙兰杨、I-214等。这类品种对短期内获得大量木材有着十分重要的现实意义。如河南省
Poplar is one of the important species of fast-growing timber in the northern plains of our country. Guided by Chairman Mao’s revolutionary line, the greening and farmland network with poplar and other fast-growing tree species in the northern plains developed rapidly and will gradually become one of the important bases for timber production in our country. However, there is still a long way to go when compared with the advanced level of poplar cultivation techniques and wood production, mainly due to the slow promotion of modern varieties, the excessive density of afforestation, extensive management and management, resulting in many “small old trees” and low-yield forests , Seriously affecting the production of timber and the protection of the effectiveness of play. According to both positive and negative experiences at home and abroad, the main technical points of poplar fast-growing and high-yielding are as follows: First, choose the poplar seedlings after years of breeding and cultivation tests for the initial identification suitable for accelerated popularization have the following poplar varieties: 1. Early Special fast-growing, but poor material varieties, such as Salmonella, I-214 and so on. Such varieties have very important practical significance for obtaining a large amount of wood in the short term. Such as Henan Province