综合评分法选育杨树纸浆材优良无性系探讨

对２２个群体杨改良无性系的材性和生长性状进行综合评定，探讨了评定无性系的方法。把纤维长度、纤维长宽比、纤维壁腔比、木材基本密度及生长性状作为评定一个无性系优劣的依据，每一项指标给予相应的赋分值。分别采用六项指标评分法和三项指标评分法，综合评定每个无性第泊得分值，最后，选出了５个优良无性系。

SELECTION AND DISCRIMINATION OF GOOD CLONES OF POPULUS FOR PAPER PULB TIMBER BY THE METHOD OF SYNTHETICAL COMPARISONS AND EVALUCTION

Fibre length, ratio of fibre length and width, ratio of fibre wall and volume, wood density, and as well growth character (tree height, diameter at breast height) were taken as the basic elements for appraising, and relevent mark value was assigned to each element. Two methods, Six-Index-Note and Three-Index-Note, were developed for discrimination of a good or bad clone. The timber properties and growth character of 22 improved clones of Populus popularis were synthetically compared and appraised by the methods and 5 good clones weredetermined.