闽南山地DH32-29桉树无性系的耐寒性调查分析

通过对华安葛山林场较高海拔山地种植的DH32-29桉树无性系的寒害进行调查,结果表明:幼龄林分寒害较重,林龄较大的林分寒害相对较轻;坡向、坡位、地形地势等是影响寒害程度的外在因素。在本区域较高海拔山地种植桉树应选择避寒环境,避免在盆地、洼地、坡地下坡和山谷等处种植;根据实践经验提出搞好林分抚育、冬前增施钾肥不施氮肥可以减轻寒害、合理搭配桉树品种、选择抗寒能力强的品种是避免寒害的根本措施。

Cold Resistance Investigation and Analysis of DH32-29 Eucalyptus Clones on South Fujian Mountains

The cold harm for DH32-29 Eucalyptus clones planted on mountains of Huaan Geshan State Owned Forest Farm at high altitude was investigated,the results showed that:severe cold damages to young forests existed,cold damages to elder forest stands were relatively light;the slope,slope position,topography,hypsography,etc.affected the level of cold damage as the external factors.we should avoid planting Eucalyptus on the basin,depression,downhill slopes and valleys,etc.with the higher mountain elevations in the region;meanwhile we should strengthen forest tending with potassium and without nitrogen before winter,which could reduce cold injury;reasonable choosing Eucalyptus species,and high cold-restance varieties was a fundamental measure for avoiding cold injury.