关键词: 抗虫杨, 生长特性, 适应性, 综合评价

Abstract: In order to select excellent afforestation varieties for forest extension and cultivation, this study investigated the height, diameter at breast height, survival rate, preserving rate, stem form, cold injury, insect pest  7 indexes of different tree varieties of middle age using the subordinate function method on the adaptability of 16 varieties of insect resistant poplar in middle growth stage at the northeast of Ulan Buh Desert, and carried out the comprehensive evaluation. The results showed that the adaptability orders of 16 insect resistant poplar were Beikang 16-22>08-09>Zhonglin 315>08-03>Tianhei>08-08>Zhonglin 2005>Beikang 16-27>08-02>08-07>Jing 2>Jing 6>Simplot>Beikang 16-8>08-14>DN-34. Preserving rate, annual growth rate and insect resistibility of Beikang 16-22 were better than those of the others, so it could be main popularized varietiy in this area and large scale afforestation could be carried out. Survival rate and preserving rate of 08-14 were the lowest and it was susceptible to diseases. Preserving rate, cold injury and annual growth rate of DN-34 were also not good. These 2 varieties were not suitable for large scale popularization in this area. Zhonglin 315, 08-03, 08-08, Zhonglin 2005, Beikang 16-27 and 08-02 could be planted on a proper scale. As for 08-09 and Tianhei with high survival and preserving rates, larger annual growth, but susceptible to insect pests, early prevention and treatments at initial violated stage were extremely necessary, so do not bring insects to planted land! Otherwise, mutual infection would be generated.

Key words: insect resistant poplar；growth characteristic；adaptability, comprehensive evaluation