邓恩桉中龄林生长效应分析  

Analysis on Growth Effect of Middle-aged Eucalyptus dunnii Plantation

作　　者：莫克钻 郭东强[2] 卢陆峰 蓝创造 陈健波[2] MO Ke-zuan1, GUO Dong-qiang1, LU Lu-feng1, LAN Chuang-zao1, CHEN Jian-bo2(1. Huashan Forest Farm of Huanjiang County, Huanjiang, Guangxi 547100, China; 2. Guangxi Forestry Research Institute, Key Laboratory of Central South Fast-gTowing Timber Cultivation of Forestry Ministry of China, Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation, Nanning530002, China)

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

出　　处：《广西林业科学》2018年第3期325-328,共4页Guangxi Forestry Science

基　　金：广西林业科技项目(桂林科字[2016]第16号)

摘　　要：邓恩桉(Eucalyptus dunnii)是优良的耐寒桉树树种,其大径材培育具有广泛的应用前景。本研究对2009年营建的9年生邓恩桉林分进行保存率、胸径、树高和形质调查分析,为邓恩桉大径材培育提供理论基础。结果表明:处于不同坡位的林分保存率、胸径、树高和形质存在差异。上坡的保存率最高(60%)。不同坡位间的树高生长存在极显著差异、单株材积存在显著差异,其中下坡的生长量最高,平均树高为22.9 m、平均胸径17.8 cm、平均单株材积为0.29m^3、单位面积蓄积量为15.09 m^3。下坡的林木干形最优,63.46%的林木没有明显弯曲;上坡的林木干形最差。邓恩桉实生苗林分生长分化大,在培育过程中应根据各坡位的情况采取相应强度的间伐措施。The preservation rate, diameter at breast height （DBH）, tree height and stem form of 9-year-oldE. dunnii stand which was planted in 2009 were analyzed. Results showed that there were differences in the preservation rates of DBH, tree height and stem form of stand. The uphill had the highest preservation rate with 60%. In terms of growth traits, there was a extremely significant difference in tree height growth between different slope positions, and there was a significant difference in individual volume. Among them, the growth increment in the downhill was the highest with the average tree height of 22.9 m, the average DBH of 17.8 cm, the average individual volume of 0.29 m3, and the per unit area of volume of 15.09 m3. The stem form in the downhill forest was the best, and 63.46% of the trees have no obvious curvature, which in the uphill for- est was the worst. The E. dunnii seedlings had large growth differentiation. In the cultivation, appropriate in- tensity thinning should be taken according to the situation of each slope.

关 键 词：邓恩桉 中龄林 生长效应 形质评价 

分 类 号：S792.39[农业科学—林木遗传育种]