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通过调查黑龙江省森工林区上个世纪 70年代以来 ,不同规模水平的杨树引种 ,均以冻害破肚根腐 为受害特征而失败。事实说明 ,发展杨树乡土树种 (大青杨、香杨 ) ,是营造速生丰产林及改善树种结构的稳妥办法。本文介绍了大青杨发展及良种选育近况 ,伊春林科院历经12年选育的伊 7号等大青杨优良无性系 ,树高与胸径比对照提高了35.2 %～ 4 8.4 %及 36 .4 % ,比大青杨同龄丰产林材积省标提高了6 3.82 %～ 187.36 %。
Through the investigation of the forest area in Heilongjiang Province since the 1970s, the introduction of poplar at different scales has been characterized by damage caused by frostbite and root rot. Facts show that the development of poplar native tree species (Populus euphratica, Fragrant poplar), is to create fast growing forest and improve the structure of the tree approach. This paper introduced the development of Populus euphratica and its breeding status. The excellent clones of Populus euphratica, such as Yi 7, selected by Yichun Academy of Forestry in 12 years, increased the tree height and DBH by 35.2% -4.48% compared with the control 36.4% higher than that of Daqingyang, the provincial standard of high yielding forest products increased by 6 3.82% ~ 187.36%.