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Heartwood variations in mid-aged plantations of erythrophleum fordii

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Journal of Forestry Research 2021年第6期32卷 2375-2383页

作者： Zhigang Zhao Wei Shen Chunsheng Wang Hongyan Jia Jie Zeng Research Institute of Tropical Forestry Chinese Academy of ForestryLongdongGuangzhou 510520People’s Republic of China Zhaoqing University Zhaoqing City 526061People’s Republic of China Experimental Centre of Tropical Forestry Chinese Academy of ForestryPingxiang City 532600People’s Republic of China

erythrophleum fordii Oliv.(Caesalpiniaceae)is a rosewood species naturally distributed in southeast Asia and south China,and the heartwood is commonly used for high-quality crafts and *** there are differences in heartwood development among single trees with distinct social status,the relationship between heartwood development and growth performance remains *** information is essential to improve plantation management for high-yield heartwood *** dominant,intermediate and suppressed trees were sampled from *** plantations aged in 32-35 years in Pingxiang City,Guangxi,*** analysis was carried out to determine horizontal and vertical variations of heartwood and *** of annual rings,diameter and area of heartwood and sapwood as well as ratios of heartwood diameter and area at breast height were all significantly influenced by the social status of trees in stands(P<0.05).In these mid-aged plantations,*** stems developed heartwood once the xylem diameter reached 5-10 cm,and then heartwood diameter and area increased with increasing xylem *** ring numbers,diameter and area as well as their ratios decreased with increasing height,while sapwood ring numbers and diameter were relatively constant within the section where heartwood *** and sapwood diameters were equal at heights of approximately 6-m for dominant,5-m for intermediate and 3-m for suppressed *** trees differed considerably from intermediate and suppressed trees in heartwood volume,while heartwood volume ratios were all below 30%,and near 90%in the stem section below 8-m height regardless of social *** analysis showed that DBH was the most important factor influencing heartwood in even-aged *** findings provide evidence for crop tree selection,thinning regimes and reasonable management of plantations of ***.

关键词： erythrophleum fordii Heartwood formation Spatial variation Tree differentiation

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柚木格木混交林与纯林营造效果比较

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林业科技通讯 2022年第11期 34-39页

作者：李运兴韦菊玲李朝英杨保国郝建中国林业科学研究院热带林业实验中心广西凭祥532699

为了解柚木(Tectona grandis)纯林与柚木与格木(erythrophleum fordii)混交林2种林分的生长效果、林地养分差异及其生长影响因素,在10年生柚木纯林及柚木与格木混交林中设置代表性样地14块,调查林分的树高、胸径、活枝下高,混交林中格... 详细信息

为了解柚木(Tectona grandis)纯林与柚木与格木(erythrophleum fordii)混交林2种林分的生长效果、林地养分差异及其生长影响因素,在10年生柚木纯林及柚木与格木混交林中设置代表性样地14块,调查林分的树高、胸径、活枝下高,混交林中格木比例,柚木间伐材心材率,林地土壤物理化学性质等。采用方差、相关性分析方法对调查数据进行统计分析。结果表明:1)混交林中柚木的树高、胸径、单株材积和林分蓄积量均大于纯林,但柚木间伐材心材率混交林小于纯林。2)混交林中对柚木树高生长有显著负相关影响的因子有:格木株数比例、格木蓄积量和土壤水解氮。3)混交林中柚木胸径生长与格木密度呈负相关。4)纯林土壤有效P与柚木心材率呈显著正相关;柚木纯林的土壤pH值和交换性Ca2+含量显著大于混交林。由此得出结论:1)采用格木营造柚木混交林可增加土壤的水解氮,但pH值和交换性Ca2+有所降低。2)混交林中格木的混交比例以1/3较适宜,柚木密度为600~750株/hm2,柚木的蓄积量最大。

关键词：柚木 Tectona grandis 格木 erythrophleum fordii 纯林混交林心材率

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格木优树选择标准

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林业科技通讯 2023年第7期 8-10页

作者：李洪果刘光金段润梅周炳江曾琪瑶唐继新中国林业科学研究院热带林业实验中心广西凭祥532600

探究格木(erythrophleum fordii)优树选择标准,为格木选优和良种选育提供依据。采用5株优势木对比法,对2片40年林龄格木人工林进行调查,选出105株候选优树,通过对比525株优势木的胸径、树高和材积等生长指标,明确了格木优树的入选标准:... 详细信息

探究格木(erythrophleum fordii)优树选择标准,为格木选优和良种选育提供依据。采用5株优势木对比法,对2片40年林龄格木人工林进行调查,选出105株候选优树,通过对比525株优势木的胸径、树高和材积等生长指标,明确了格木优树的入选标准:格木优树的胸径、树高和材积需在优势木均值的基础上,分别增加(3.0~3.5)δ、(1.0~1.5)δ和(3.0~3.5)δ,对应优树的胸径、树高和材积指标需分别大于优势木的28.4%~47.3%、17.4%~26.1%和71.1%~83.0%。本标准适用于同龄格木林。

关键词：格木 erythrophleum fordii 优树选择标准