该项研究是用我省刺槐协作组选择的338株优树,经过嫁接育苗,苗期测定,从中筛选出生长较好的185个无性系,建立无性系测定林。经过6年的对比试验,从中选育出了9个优良无性系,这9个优良无性系,生长快,干形好,增益显著。其混合系主干材积与一般对照比增益29.33％～210.53％,平均为97.88％。 In this study, we selected 338 elite trees selected by the cooperative group of Robinia pseudoacacia in our province, and screened 185 clones with good growth through grafting seedling and seedling stage to establish clonal forest. After 6 years of comparative experiments, 9 excellent clones were bred from them, and these 9 fine clones grew fast, had good dryness and gained significant gains. The proportion of its main stem volume was 29.33% ~ 210.53% compared with the control, with an average of 97.88%.