Abstract:This paper deals with the provenance tests of three new clones of the Aigeiros Poplars,namely Populus deltoides cv.Ⅰ-63/51,P.deltoides cv.Ⅰ-69/55 and P.× euramericana cv.Ⅰ-72/58.The height and diameter of these new clones grew rapidly.Their increment was higher than that of the standard clones of Euro-American poplarⅠ-214.The height and diameter growth measured four years after planting average 15—17 m.and aboout 25—28cm.respectively.Their resistance to Melampsora rust and Marssonia diseases was appreciably high.In conclusion,these new clones are characterized by fastgrowth,high production and disease resistance and show a well promised development in the southern plain of the Yellow River.