74杨和35杨的引种

从意大利引进的欧美杨无性系74杨及美洲黑杨无性系35杨,4年生材积分别达到0.3031、0.3256立方米,超过对照72杨的16.4%和25%,并超过了它们在意大利的生长量,现已正常开花结实.同时,具有易扦插繁殖、造林成活率高、不感染严重病虫害的优良特性,可以在气候温暖的地区进一步开展无性系区域试验,以便为大规模推广提供科学依据.

Introduction of poplar 74 and 35

Introduction of poplar 74 and 35/Wang Baosong pan Mingjian Tu Zhongyu* el al//Journal of Jiangsu Forestry Science and Technology.-l990, 17 (4) .-1 ~8.P. x euramaricana CL'74/76' and P. deltoides CL '35/66'was introduced from Italy in 1986.In their 4-year-old the mean individual volume of tim-ber has reached 0.3031 and 0.3256 cubic meters for each clone in Nanjin,Ji-ansu province, exceeded that of the control poplor 1-72/58 by 16.4% and 25.0% .Their growth speed is higher in Nanjin than in Italy. They also have advantage of high s urvival rate of cutting and plantation, strong resis-tance to insects and diseases and so on. The introduction is success, so that the rigional test need to be arrangad inthe warm area for these two Lones in order to take more information for the further popularization. Authors'addresst Forestry research institute of Jiangsu province, Dong-shanqiao, zhonghuamenwei, Nanjing 211153, PRC.