龙竹竹材吸湿膨胀特性研究

对龙竹竹材的吸湿膨胀特性进行了测试和分析。结果表明,竹材各个方向上吸湿膨胀特性差异显著,且竹间部位和竹节部位的吸湿膨胀特性也有一定差异。     

论木材运输管理的问题与对策

木材运输管理是森林资源管理的主要环节和重要手段，是对森林采伐限额制度执行情况监督的必要措施，由于受短期和局部利益的驱动，一些木材经营者为追求高利润，采取不法手段，千方百计地进行木材违法运输，也有部分木材检查站由于管理不善，也存在执法不严和违纪犯法现象，为此，提出了加强对木材检查站的领导和建设、建立巡警队或稽查队加强对木材运输的检查、实行县（市）内木材运输证制度、进一步完善林业法律、法规和规章及强化宣传等措施。     

根据盗伐、滥伐林木现场树坑作相应林木材积估测

介绍了在盗伐、滥伐林木现场仅有树坑的情况下，利用相应小班森林资源规划设计调查资料或相近林分调查资料对被盗伐、滥伐林木作材积估测的方法，并举例说明。     

CITES公约中云南濒危管制木材树种资源概述

根据CITES公约附录保护与管制木材种类名录，对云南处于濒危管制的木材树种资源现状进行研究。结果表明，全省被列入CITES公约的木材共有8种（类），其中附录Ⅱ有5种（类），附录Ⅲ有3种（类）。     

明甪直天王殿松木斗拱振动台试验研究

以甪直保圣寺天王殿斗拱为参考对象,进行无缩尺松木斗拱模型的地震台试验研究。通过对斗拱的加速度与动力放大系数变化趋势、斗拱在振动过程中位移响应变化特征、斗拱变形最大时刻和各构件变形最大时刻的滑移位移和回转位移数值对比分析,得出以下结论：地震加速度用于衡量地震烈度,并不能直接反映斗拱试件的最大变形;振动频率的变化对斗拱回转变形的变化起重要作用,振幅是决定各构件水平滑移的主要因素;各构件变形最大值与斗拱整体变形最大值具有很强相关性,其中栌斗和华拱的回转变形对斗拱的整体变形而言,处于支配地位;斗拱的华拱连下昂部分主要起装饰作用,其榫卯连接节点位置在振动过程中较为薄弱,在对实际文物维护修缮过程中应引起重视并采取相关加固措施。     

香梨幼林园在不同灌溉条件下生长的动态变化相关分析

在香梨3年生幼林园内,进行了常规沟植、渠道内外二侧种植的土壤贮水量和树木新梢生长量、叶片生长状况变化的测定。结果表明,渠外行的土壤贮水量和生长状况均好于沟植和渠内行。揭示了影响树木生长的不同灌溉条件的土壤水分状况和过程。提出了生产中要提倡渠外行栽种香梨,保持沟植香梨,放弃渠内行栽植香梨的生产模式理论依据。     

小径竹重组结构材性能影响因子的研究

以南方资源丰富的小径竹为原料研究了小径竹重组结构材制造工艺,重点探讨了重组竹结构材的密度,浸胶后竹束的干燥温度,去青与不去青以及竹种(刚竹、淡竹、慈竹、雷竹)对重组竹结构材物理力学性能的影响,并分析了用自行设计的竹材压轧疏解机对小径竹疏解的原理。为高效利用小径竹提供制造工艺依据。     

税费变化对国有林场商品用材林林木资产评估值影响分析

为完善国有林场森林资源的价值核算,更客观真实地反应其经营管理绩效。本文概述了我国林业税费体制的历史沿革,并以某国有林场为实例,在假设其它条件不变的前提下,分别以不征收特产税和将"两金"由20%调整为5%及二者兼而有之三种情况,具体分析了税费变化对林木资产评估值的影响。     

S‐locus diversity and cross‐compatibility of wild Prunus avium for timber breeding

Prunus avium is primarily cultivated for its fruit, sweet cherries. However, it is also used to produce high‐quality timber. In a P. avium seed orchard, gametophytic self‐incompatibility is a restriction for free pollen flow and should be considered when establishing basic forest materials. In this study, S‐locus diversity and cross‐incompatibility of wild cherry individuals in clonal banks established for breeding for timber production were investigated. Wild cherry trees (140) with outstanding forest growth habit, collected in northern Spain, grafted and planted in two clonal banks, were genotyped at the S‐locus. The self‐incompatibility S‐locus genes, S‐RNase and SFB, were analysed by PCR. Twenty‐two S‐haplotypes, resulting in 72 different S‐genotypes, were identified. The genotypes were grouped into 33 incompatibility groups and 39 unique genotypes. This initial S‐locus analysis revealed large genetic diversity of wild cherry trees from the Spanish northern deciduous forest, and provides useful information for seed orchard design. Wild P. avium displays significantly more genetic diversity than what is detected in local cultivars, revealing a narrowing of genetic diversity during local domestication.     

Benefits and risks for Melanesian households from commercialising Canarium indicum

This research note discusses the benefits and risks for Melanesian households arising from attempts to increasingly commercialise Canarium indicum, an edible tree nut indigenous to Papua New Guinea, the Solomon Islands and Vanuatu. Qualitative data were generated during workshops and interviews with Canarium industry stakeholders about the impacts associated with a series of interventions designed to encourage further commercialisation of Canarium. The findings are organised according to three dimensions that elucidate the social implications of industry development for local communities: (i) income and growth; (ii) equity; and (iii) voice and choice. Broader distribution of benefits within and between countries, as well as among supply chain actors, requires a stronger policy response at regional (Melanesia) and national scales, equitable gender representation to avoid reinforcing existing inequalities, and delegation of decision‐making power to the appropriate level to facilitate effective community participation and their links with other stakeholders. Thus, it remains to be seen whether Canarium‐related benefits arising from its commercialisation can be sufficiently reliable compared with either other sources of income (e.g. existing employment opportunities for those located near urban areas) or utilising the resource for subsistence purposes.