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我国苗木培育理论与技术进展 总被引：57，自引：5，他引：52
分别从裸根苗培育技术,容器苗培育技术,无性繁殖苗培育技术,生物制剂在育苗中的应用,稀土在育苗中的应用,苗木质量评价技术,苗木活力保护技术等方面,总结了我国苗木培育理论和生产技术的最新进展. 相似文献
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随着计算机软件技术的应用发展和普及,GIS软件在我国的各行业中都得到了非常普遍的应用,GIS技术在资源调查及制图的过程中发挥了巨大的作用。本文对GIS技术在林业规划制图中的有效性应用进行了研究,并对GIS技术相对于其他技术的优势及其在林业规划制图中的具体应用进行了阐述,以期为GIS技术在林业规划制图中的推广应用垫定技术基础。 相似文献
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随着“后基因组时代”的到来,国际学术界已经认识到发展快速低成本测序技术的重要性。在这样的背景下,高通量测序技术应运而生,其代表性技术平台有Roche的454测序技术、Illumina的Solexa测序技术和ABI的Solid测序技术。笔者通过查阅相关文献,系统回顾了第1代测序技术发展过程,详细叙述了高通量测序技术原理和方法,探讨了高通量测序技术在植物分子生物学研究中的应用。 相似文献
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介绍了目前在昆虫分类鉴定中常用的分子生物学技术,包括分子杂交技术、PCR技术、RFLP技术、RAPD技术,SSCP和DSCP技术、DNA条形码。结合自身工作,对分子生物学昆虫鉴定方法在植保中的应用前景进行了阐述。 相似文献
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浅论GIS技术在林业工作中的应用 总被引：1，自引：0，他引：1
山晓燕 《内蒙古林业调查设计》2012,(1):65-66,74
GIS(Geographic Information System,地理信息系统)技术是近年来迅速发展起来的一门空间信息分析技术,在资源与环境应用领域中,发挥着技术先导的作用。文章根据近几年在林业调查工作中应用GIS技术获得的经验和GIS技术的发展趋势,阐述了在林业工作中应用GIS技术的必要性、可行性及其应用范围和前景。 相似文献
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在阐述生态建筑和生态建筑技术基本概念基础上,从传统的生态观出发,通过分析我国古代建筑中生态低技术应用的价值与意义,讨论传统生态低技术在现代建筑中的融合运用后发现:现代建筑与古代建筑在生态低技术方面存在众多共同之处,生态建筑低技术具有良好的发展前景. 相似文献
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在阐述生态建筑和生态建筑技术基本概念基础上,从传统的生态观出发,通过分析我国古代建筑中生态低技术应用的价值与意义,讨论传统生态低技术在现代建筑中的融合运用后发现：现代建筑与古代建筑在生态低技术方面存在众多共同之处,生态建筑低技术具有良好的发展前景。 相似文献
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3S技术在森林资源调查规划设计中的应用 总被引：1，自引：0，他引：1
文章论述了3S技术的概念和森林资源规划设计调查,在了解3S技术优势的基础上分析和研究3S技术在我国森林资源规划设计调查工作中的实际应用现状,同时对3S技术在我国的应用前景进行展望,以期有效促进3S技术的进一步发展和应用。 相似文献
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Effect of growth rate on wood specific gravity and selected mechanical properties in individual species from distinct wood categories 总被引：5，自引：0，他引：5
Dr. S. Y. Zhang 《Wood Science and Technology》1995,29(6):451-465
Summary This study examined the relationships of wood specific gravity and selected mechanical properties (MOR, MOE and Cmax) with growth rate in 16 timber species from four distinct wood categories: 1) first softwood category (FSC); 2) second softwood category (SSC); 3) diffuse-porous wood category (DPC); and 4) ring-porous wood category (RPC). And genetic, silvicultural and environmental influence on the relationships was briefly discussed. Statistical results show that the relationships of specific gravity and the mechanical properties with growth rate vary remarkably with both the wood property and the wood category. In general, the mechanical properties in the FSC species decrease remarkably with increasing growth rate, while they appear to be less influenced in the SSC species. Compared with the softwoods studied, the physico-mechanical properties in the hardwoods studied are remarkably less influenced. In the DPC species, growth rate generally has very a little influence on both specific gravity and the mechanical properties. In the RPC species, the physico-mechanical properties appear not to decrease with increasing growth rate, and in some species they even tend to increase. Among the three mechanical properties studied, MOE is remarkably less influenced by growth rate than MOR and Cmax. Compared with specific gravity, however, the mechanical properties are generally more influenced by growth rate. Therefore, the impact of growth rate on wood mechanical properties in a species can not be estimated exactly through the relationship of wood specific gravity with growth rate. Path analysis reveals that growth rate has a large effect on the mechanical properties which can be accounted for by the affected specific gravity. In addition to this indirect effect through specific gravity, growth rate still has an additional effect on the mechanical properties which can not be explained by specific gravity. In the SFC species, such effect is significant, and this, to a lesser extent, applies to the DPC species. However, this effect is not remarkable in the SSC species and may be negligible in the RPC species. 相似文献
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Variation in wood properties of six natural acacia hybrid clones in northern Vietnam 总被引：1，自引：0，他引：1
Nguyen Tu Kim Mikiko Ochiishi Junji Matsumura Kazuyuki Oda 《Journal of Wood Science》2008,54(6):436-442
Wood properties of six 8-year-old natural acacia hybrid clones between Acacia mangium and Acacia auriculiformis, planted in Bavi, Vietnam, were studied. The hybrid clones possessed obvious heterosis in growth and in some wood properties.
The characteristics of growth, air-dry specific gravity, lengths of fibers and vessel elements, S2 microfibril angle, green moisture content, and shrinkage were examined to clarify the variation among clones. From the results,
the differences among the clones in growth and in some wood properties were significant. The pattern of distribution of specific
gravity showed that there were low and high specific gravity zones in the stem. Specific gravity at stump height or at 3.0
m was useful for prediction of specific gravity in the whole tree stem. Moreover, clones with high specific gravity can be
predicted at a young age. There was no significant correlation between diameter growth and specific gravity. Of the six clones
studied, clone BV5 was selected as the best based on its growth ability and specific gravity.
Part of this report was presented at the 57th Annual Meeting of the Japan Wood Research Society, Hiroshima, August 2007 相似文献
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Arend M 《Tree physiology》2008,28(8):1263-1267
The occurrence and distribution of (1,4)-beta-galactan in wood cells of poplar (Populus trichocarpa Torr. & A. Gray x P. koreana Rehder) were studied by immunolabeling with a monoclonal antibody (LM5) specific to this carbohydrate epitope. Immunofluorescence microscopy revealed exclusive binding of the LM5 antibody to tension wood fibers, indicating the specific presence of (1,4)-beta-galactan in cell walls of this wood cell type. Higher magnifications achieved with the fluorescence microscope and additional immunogold electron microscopy showed that the binding of the LM5 antibody was mainly restricted to a narrow cell wall area between the gelatinous G-layer and the secondary cell wall. This labeling pattern strongly suggests a role of (1,4)-beta-galactan in cross-linking the G-layer and secondary cell wall. Furthermore, the exclusive localization of (1,4)-beta-galactan in tension wood strengthens the view that this carbohydrate epitope can be considered a highly specific marker of reaction wood formation in mechanically stressed trees. 相似文献
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联结度指数构造模型及其应用 总被引：5，自引：0，他引：5
植物种间联结关系的研究约有 1 0 0年的历史 ,国内外学者提出了多种公式 :I1 =(ad-bc) (ad bc) (Yule ,1 91 2 ) ,I2 =2a (2a b c) (Dice ,1 94 5 ) ,I3 =(a b) (a c) a(Margalef,1 95 8) ,上述这些公式均没有考虑每一样方的种群数量 ,而只检查种是否出现 ;无疑这些指数受 相似文献
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In this study, we investigated the specific gravity of wood samples collected from a total of 31 woody species, consisting of 20 trees, 10 shrubs and one species of bamboo from sub-tropical regions of Garhwal Himalayas, India. Results show that among these woody species, the specific gravity of trees ranged from 0.34 for Erythrina suberosa to 0.83 for Albizia procera. For shrub species the specific gravity of Ricinus communis was 0.39 and that of Dodonaea viscosa 0.93. The average specific gravity of trees was 0.58 and of shrubs 0.66. 相似文献
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