Table 3 Mean above-ground attributes and total root mass and length of clones of poplar established from cuttings

P. deltoides × P. ciliata San Rosa

1.52^bc (0.34)

48.8^b (23.6)

93.6^c (26.9)

15.2^b (5.0)

6.4^abc (1.7)

P. deltoides × P. nigra Fraser

1.47^bc (0.24)

58.7^b (19.5)

141.4^abc (19.5)

13.7^b (4.4)

4.1^bc (1.1)

P. deltoides × P. nigra Veronese

1.51^bc (0.21)

60.1^b (16.6)

190.0^a (16.5)

16.4^b (5.3)

7.3^ab (2.0)

P. deltoides × P. yunnanensis Kawa

2.30^a (0.17)

156.2^a (27.1)

164.7^ab (13.3)

39.1^a (12.7)

11.8^a (3.2)

P. maximowiczii × P. nigra Geyles

1.84^ab (0.20)

85.9^ab (22.4)

108.6^c (15.6)

45.9^a (14.9)

10.3^a (2.8)

P. trichocarpa PN471

1.20^c (0.22)

51.0^b (15.3)

132.1^bc (17.8)

10.4^b (3.4)

3.5^c (0.9)

P value

0.004

0.021

0.009

0.001

0.006