云南松单板类人造板材良种选育的研究

以云南松优良群体为选择基础,以优株为选择对象,在评出的优良产地内选择了石屏牛达、龙朋,双柏鄂嘉、雨龙,云龙天池、大栗树,禄丰樟木箐等天然优良林分,在林分内按优树标准开展了优良个体选择.共选择表型较好的优株205株,分株开展了多点年度间的表型测定.以3～4年生优树子代的生长量及优树的纹理通直度、木材密度,松脂含量作为选择性状,经对各性状的遗传力和权重值等进行综合选择,评选出了牛达39号、13号、28号、18号、3号,龙朋6号、5号、2号,双柏鄂嘉3号、17号,双柏雨龙12号,腾冲古永9号,贡山8号,云龙1号等32个符合单板类人造板材良种要求的优良单株.它们的树高增长率79.0%～13.3%,实际增益30.63%,遗传增益16.85%,其中有21个家系的木材密度提高了5.59%,松脂含量为对照的82.4%,树干通直度达97.6%.评选出的这些优株已进行了保存和利用.     

森林认证与中国木材产品市场

森林认证作为促进森林可持续经营的一种市场机制已经在世界范围内广泛开展 ,特别是欧洲和北美国家的消费者普遍要求在市场上销售的木材产品应贴有经过认证的标签 ,以证明他们所购买的木材产品源自可持续经营的森林。因此 ,中国的森林经营认证和林产品的产销监管链认证 (绿色标签 )对于促进森林的可持续经营 ,稳定企业现有产品市场份额 ,进入新市场具有重要意义。     

木材及木材胶粘剂防腐研发现状及其发展趋势

简要回顾了木材及木材胶粘剂防腐技术研究与开发的技术背景和国内外发展现状,着重总结了木材防腐剂及生物质基木材胶粘剂防腐剂的种类、特性和应用情况;对本领域今后的发展趋势作了初步探讨。     

广东省藜蒴研究进展

文章综述了近年来藜蒴的研究概况,指出藜蒴是一种分布广、种源丰富的优良乡土树种,在广东分布尤广;藜蒴人工林生物量较大,林地的土壤保水性和通气性均比火力楠林地、荷木林地的好;藜蒴造林可用实生苗和扦插苗,马尾松、藜蒴混交林比马尾松纯林树种根系的吸收能力强。藜蒴主要病虫害种类达30多种,其中虫害25种,病害8种以上;藜蒴木材用途广,可应用于中纤板生产,通过不同的抽提处理来改变或控制其弦界面性质。     

淹水程度对滩地枫杨木材化学性质的影响

通过研究淹水程度对滩地枫杨木材化学性质的影响 ,以期全面了解滩地主要造林树种的化学性质 ,提出合理的定向培育技术及进一步综合利用措施 .研究结果表明 :滩地枫杨木材的 p H值均小于 6.5 ,属于酸性木材 ,第一、二组木材的 p H值分别为 5 .41和 5 .0 0 ,在 0 .0 5水平上差异显著 .除碱性缓冲容量外 ,第二组木材的酸性缓冲容量、总缓冲容量以及每降低 1p H值消耗的 HC1量均比第一组高 .淹水程度对滩地枫杨木材纤素含量几乎无影响 ,其值均为 45 .2 %左右 ;但第一、二组的半纤维素分别为 14 .0 4%和19.5 0 % ,增加了 3 8.9% ;第一、二组的木质素含量分别为 19.9%和 2 0 .6% ,增加了 3 .5 % .     

China''''s Wood Industry after Joining WTO

After reviewing the present status and prospects of wood industry in the world, the author suggests that in response to the new situation of economic globalization and China's entry into the WTO, the Chinese wood industry should further develop IT application, optimize and upgrade industrial structure and raise quality of labor force, blazing a new trail to industrialization featuring high scientific and technological content, good economic return, low resources consumption, little environmental pollution and a full display of advantages in human resources, so as to enhance its international competitiveness to supply customers better products and services at lower cost.     

单株立木材积测定方法的研究

单株立木材积的测定对林业生产和科学研究工作有着重要的作用,主要的测定方法是通过胸径、树高、上部直径或上部直径的高度来计算干形指数,然后计算单株立木材积。而不同的方法所用上部直径不同。本文用5个树种的解析木,分别对较常见的5种测定方法的测定精度进行了研究。得出的结论为:3/4形点法、0 5形点法、胸高形率法精度较高,绝对形率法、望高法精度较低。建议对干形饱满的树种采用3/4形点法、0 5形点法;对干形尖削的树种采用0 5形点法、胸高形率法。     

马尾松中龄施肥木材密度和干缩率的研究

选用广西马尾松龄施肥材料（连续观测13年），根据国际《木材物理力学试验方法》，研究了施肥对木材密度和干缩率的影响，结果表明：N、P、K三要素中，以N、P肥对木材密度和干缩率的影响较大。⑴总的来说P增加木材密度和干缩率，N肥降低木材密度木材干缩率。N、P肥降低木材差异干缩。施K肥对木材密度和干缩率的影响规律性不明显。⑵N、P、K施肥对木材密度和干缩率的影响及其变化程度，与肥种、施肥量、树干部位、木纹方向、气干或全干状态有关。施P肥木材密度具有增加的趋势，而且树干下部基本密度方差分析各处理间差异显著。N、K肥对木材密度的影响，规律性不明显。P肥使木材干缩率增加，P肥主要增加的是全干干缩率和径向气干干缩率，特别是树干下部径向气干干缩率各处理间差异显著。K肥对干缩率的影响规律性不明显，有待进一步研究。⑶为了保证木材质量，对于纤维用材林，主要施P肥；对于结构用材林，可施P肥，适当考虑N肥、K肥施用应慎重。     

转多基因库安托杨非靶目标材性性状分析

In this study, the transgenic poplar (Populus × euramericana‘Guariento’) harboring five exogenous genes (SacB, Vgb, BtCry3A, OC-I and JERF36^#) and the control plants were selected, comparing the wood property variation of 5-year-old trees, and trying to understand whether the transgenic of exogenous genes produce unintended effects. The results showed that the transgenic of exogenous genes caused a wide range of variation in non-target wood properties, the variations were found not only between transgenic and wild-type lines, but also among transgenic lines. Compared with the control, the transgenic lines, the contents of holocellulose and cellulose increased, the total lignin and acid soluble lignin decreased, the fiber length, the fiber width, the microfibril angle and the acid insoluble lignin varied uncertainly. It is concluded that the introduced exogenous gene could generate unintended effects on corresponding non-target target traits.     

Customer adapted grading of Scots pine sawn timber using a multivariate method

To define new grading rules, or to customize the ones in use in a rule-based automatic grading (RBAG) system of boards, is a time-consuming job for a sawmill engineer. This has the effect that changes are rarely made. The objective of this study was to continue the development of a method that replaces the calibration of grading rule settings by a holistic-subjective automatic grading, using multivariate models. The objective was also to investigate if this approach can improve sawmill profitability and at the same time have a satisfied customer. For the study, 323 Scots pine (Pinus sylvestris L.) boards were manually graded according to the preferences of an important customer. That is, a customer that regularly purchases significant volumes of sawn timber. This manual grading was seen as reference grading in this work. The same boards were also scanned and graded by a RBAG system, calibrated for the same customer. Multivariate models for prediction of board grade based on aggregated knot variables, obtained from the scanning, were calibrated using partial least squares regression. The results show that prediction of board grades by the multivariate models were more correct, with respect to the manual grading, than the grading by the RBAG system. The prediction of board grades based on multivariate models resulted in 76–87% of the boards graded correctly, according to the manual grading, while the corresponding number was 63% for the RBAG system.