不同海拔下邓恩桉种源的林分生长特征分析  

Analyses on the Growth Characteristics of Eucalyptus dunniiat Different Altitudes

作　　者：卢陆峰 蒙江拢 覃余武 郭东强[3,4,5] 陈健波[3,4,5] 

机构地区：[1]广西环江毛南族自治县华山林场,广西环江547100 [2]广西环江毛南族自治县爱山林业试验场,广西环江547100 [3]广西壮族自治区林业科学研究院,广西南宁530002 [4]国家林业局中南速生材繁育实验室,广西南宁530002 [5]广西优良用材林资源培育重点实验室,广西南宁530002

出　　处：《桉树科技》2016年第2期8-14,共7页Eucalypt Science & Technology

基　　金：中央财政林业科技推广示范资金项目([2015]TG18号)

摘　　要：对广西环江华山林场两个不同海拔试点10个邓恩桉种源的保存率和生长性状进行观测和分析,结果表明:高海拔试点保存率下降幅度较大,并在2011—2012年间下降幅度达到最大值,低海拔试点由于2012—2013年间遭遇冬季霜冻天气,下降幅度出现最大值。4.5年生邓恩桉种源保存率表现为低海拔试点高于高海拔试点,表现最好的种源分别为D9509和D9507。随海拔升高4.5年生邓恩桉种源3个生长性状值明显下降,其中高海拔种源间树高变异性较大。各种源两个试点平均单位面积蓄积量最高的为D9509,且稳定性好,D9504、D9507生长较好,适合低海拔种植,D9502则适合高海拔种植。Results from investigations of survival and growth characteristics for 10 provenances of Eucalyptus dunnii at Hua Shan Forest Farm across two altitudes indicated that： survival rates decreased at the higheraltitude and reached maximum between 2011 and 2012. On the other hand, survival rates decreased the most between 2012 and 2013 due the incidence of snow, especially at the loweraltitude. At the stand age of 4.5 years, survival rates at the higheraltitude were greater than at the lower altitude. Provenances D9509 and D9507 showed the best survivals among all provenances. With the increase of altitude, growth traits decreased significantly and tree height（H） differed significantly among the provenancesat the higheraltitude. The investigations showed that： provenance D9509 was suitable for planting at both altitudes, having the highest and most stable yields; provenances D9504 and D9507 were suitable for planting at the lower altitude, and provenance D9502 was suitable for the higher altitude.

关 键 词：邓恩桉 生长特性 海拔 

分 类 号：S758.52[农业科学—森林经理学]