【摘要】 以苗高、地径生长量和叶片自然感病程度为测定指标,对引进的26个杨树杂种无性系苗期生长性状进行了比较研究。结果表明,欧美杨杂种、美洲黑杨×青杨杂种无性系生长量和抗病性超过或接近对照品种107号杨或陕林4号杨,有进一步引种推广的前景;而美洲黑杨×小叶杨表现较差,建议有选择的保留。更多还原

【Abstract】 The height, ground diamerer and leaf natural infection degree were as measured to study seedling growth traits of Populus crossbreed clone. The result showed that the growth and resistance of P. × euramericana and P. deltoids × cathayana clone were higher or to P. × euramericana cl. ’ 74/76’ or P. deltoids × cathayana’ SL-4 ’ , and should be disseminoted; whereas P. deltoids × sinmonii was lower than comparision, it is suggested that P. del-toides × sinmonill be preservel by selecting.更多还原