Abstract:

Since 1989,FAO project GCP/CPR/009/BEL of the Three North Shelterbelt Programme has assisted in introducting more than 650 poplar clones.This material has been stored in clonal banks,and parts of it is being tested in field clonal trials in different sites of Korqin sandy lands.This paper summarizes the preliminary results from four main trials.23 clones had been selected by multiple evaluation consisted of 5 main tactor indexes and 2 secondary tactor indexes from contrast trials based on primary aelection.The results showed that the growth increment of clones Jian 10^# (P.×euramericana cv' ND182),Xiaohei 8401 (P.simonii-Baicheng × P.nigra-Aertai 8401),Bailin 2^#(P.nigra × P.pyramidalis),Euro-American I-M (P.euramericana cl.“I-M”),Zhonglin 86-22(P.Zhonglin 86-22),Heilin 1^#(P.xiaohei × P.p15A cl.),Liaoza 2^#(P.simonii × Xiaozhuannica cl.Liaoza-2),Nixing × Shanhaiguan (P.nigra × Puplus deltoides cv.“Shanhaiguan”),Zhongchi Heixiao(P.nigra × P.simonii cv Zhongchi'),Faku 1^#(P.simonii × Xiaozhuannica cl.Faku-1),etc.,was obviously beyond Baicheng 41^#(P.sinonii × Xiaozhuannica cl.Baicheng-41)and Baicheng 2^#(P.simonii × Xiaozhuannica cl.'Baicheng-2),which were the local main tree species.Meanwhile,cold resistance,disease and pest resistance,and stem form of these clones also behave prominently.So the above clones are very suitable for planting and extending in Korqin sandy land.

Key words: Clone, Primary selection, Integrated evaluation, Afforestation, Poplar