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目前我国杨树的发展,业已进入到一个新的时期。在平原农业区里,随着多种经营的发展,杨树已被当作经济作物加以栽培,有的营造小片杨树丰产林,有的进行林农间作。由于经营栽培杨树林投资少,收益大,深受一些林农的欢迎。为了促进这一事业的开展,特介绍几个杨树良种及其速生丰产栽培技术,以供参考。一、几个杨树品种的特性(一)沙兰杨:是德国人培育的一个欧美杨品种。中国科学院北京植物园、中国林科院林研所于1954、1959年先后从德意志民主共和国引进北京,1959年引入陕西。这一品种的特性是适应性较强,适生范围较广,
At present, the development of poplar in China has entered a new period. In the plain farming areas, poplar trees have been cultivated as cash crops with diversified management practices. Some have created small poplar trees and some have intercropped forests. As the management of poplar cultivation less investment, large profits, welcomed by some farmers. In order to promote this undertaking, it introduces some poplar varieties and their fast-growing and high-yield cultivation techniques for reference. First, the characteristics of several varieties of poplar (a) Sallam Yang: Germans cultivate a European and American poplar species. Beijing Botanical Garden, Chinese Academy of Sciences, Forestry Research Institute of China Academy of Forestry in 1954, 1959 from the German Democratic Republic introduced Beijing, 1959 introduced to Shaanxi. The characteristics of this species is adaptable, a wider range of suitable living,