黑杨派5个无性系滩地造林对比试验

Contrast trial on each forestation with five clones of Sect.Aigeiros Duby

黑杨派无性系 35杨和苏杨 7号树冠开展 ,生长量大 ;74杨冠窄、干形端直 ,干材出材率高。在汛期淹水和地下水位较高的江滩、湖滩地 ,35杨的材积生长量高于黑杨派其他无性系 ;74杨在滩地生长量较低 ,在季节性淹水环境下会发生皮裂、干腐 ,此类立地不宜造林 ,但在地下水位较深的农田沟边有较好的生长量 ,可用于类似情况下的沟渠、道路绿化栽植。

Among the five clones of Sect.Ageiros Duby,CL '35' and Suyang No.7 have a wide canopy and high increment while CL'74' is with a narrow canopy,straight trunk and great mill run.In the beaches inundated or with a higher groundwater evel,the volume increment of CL'35' excels that of the other clones.Beaches are not suitable sites for forestation with CL'74' whereas it has got fairly high increment if planted ditches near farmlands with deep groundwater levels and then can be planted on roadsides and by ditches as well.