未来的人居建筑及其设计策略     

吴健梅  陆明 《森林工程》2003,19(6):67-68,39

本文研究了未来的人居建筑的发展趋势及其3个主要特点，即智能型、有机性和生态化。并且从建筑师的角度提出了相应的设计策略。  相似文献   

亚麻屑刨花板生产线工艺设计特点   总被引：1，自引：0，他引：1  

濮安彬  陆仁书 《木材工业》1996,10(2):11-15

本文以１．００万ｍ＾３／ａ的生产规模为例，介绍亚麻屑刨花板生产线的工艺特点和设备选型。  相似文献   

THE QUICK DETERMINATION METHOD OF RESIN CONTENT IN LARCH WOOD     

Lu Wenda Xu Xiuwen Zhao Dejun Tan Haiyan Northeast Forestry University 《林业研究》1992,3(1):62-67

The resin content in larch wood is usually determined by the traditionalBenzene-Alcohol Extract Method(BAEM).In order to meet the requirement of production prac-tice,the authors present two simple quick determination methods,IR lamp method and hydrogenperoxide solution method.Compared with the results of traditional method,the results of newmethods are nearly the same as former,therefore,both two methods can reflect the change condi-tion of resin content in wood.  相似文献   

In vitro plantlet formation from embryonic explants of eastern white cedar (Thuja occidentalis L.)     

Harry IS  Thompson MR  Lu CY  Thorpe TA 《Tree physiology》1987,3(3):273-283

A protocol is described for the in vitro production of plantlets from embryonic explants of eastern white cedar (Thuja occidentalis L.). Bud induction was optimal when embryonic explants were cultured for 20-25 days on half-strength Quoirin and Le Poivre mineral salts containing equimolar concentrations (10(-6) M) of N(6)-benzyladenine and 2-isopentyl adenine. Bud development was achieved in phytohormone-free medium in the presence of activated charcoal. Maximal shoot elongation occurred on half-strength Quoirin and Le Poivre salts, whereas shoot multiplication was optimal on half-strength Bornman's MCM salts in the presence of cytokinin. Hardened shoots, dipped in commercial rooting powder containing indole-3-butyric acid, rooted optimally in mist under non-sterile greenhouse conditions. Both rooting and subsequent plantlet growth was best when Redi-Earth((R)) was used as a substrate. Over 250 plantlets per embryo can be produced annually by this technique.  相似文献   

Carbon return and dynamics of litterfall in natural forest and monoculture plantation of Castanopsis kawakamii in subtropical China     

Guo Jianfen  Xie Jinsheng  Lu Haoliang  Liu Dongxia  Yang Yusheng  Chen Guangshui 《中国林学(英文版)》2004,6(1):33-36

The amount of carbon returned through litterfall and its seasonal pattern were studied in a natural forest of Castanopsis kawakamii (NF) and adjacent monoculture plantations of C. kawakamii (CK) and Chinese fir (Cunninghamia lanceolata) (CF) in Sanming, Fujian Province, China. Mean annual carbon return through total litterfall over 3 years (from 1999 to 2001) was 5.097 t·hm⁻² in the NF, 4.337 t·hm⁻² in the CK and 2.502 t·hm⁻² in the CF respectively. Of the total carbon return in the three forests, leaf contribution accounted for 58.96%, 68.53% and 56.12% and twig 24.41%, 22.34% and 26.18%, respectively. The seasonal patterns of carbon return from total litterfall and leaf-litter were quite similar among the three forests. A peak of carbon input from litterfall in the NF and the CK occurred in spring except for the highest annual C return through branch litter of the NF in summer, while the CF showed the maximum C return in summer. The results of this study demonstrate that the natural forest has a greater C return through litterfall than monoculture plantations, which is beneficial to the increase of soil organic matter storage and the maintenance of soil fertility. [Supported by the Teaching and Research Award Program of MOE P.R.C. (TRAPOYT) and the Key Basic Research Project of Fujian Province (2000F004)]  相似文献   

土壤有机碳动态模型的研究进展   总被引：1，自引：0，他引：1  

杨丽霞  潘剑君 《林业研究》2003,14(4):323-330

As the largest pool of terrestrial organic carbon, soils interact strongly with atmosphere composition, climate, and land change. Soil organic carbon dynamics in ecosystem plays a great role in global carbon cycle and global change. With development of mathematical models that simulate changes in soil organic carbon, there have been considerable advances in understanding soil organic carbon dynamics. This paper mainly reviewed the composition of soil organic matter and its influenced factors, and recommended some soil organic matter models worldwide. Based on the analyses of the developed results at home and abroad, it is suggested that future soil organic matter models should be developed toward based-process models, and not always empirical ones. The models are able to reveal their interaction between soil carbon systems, climate and land cover by technique and methods of GIS (Geographical Information System) and RS (Remote Sensing). These models should be developed at a global scale, in dynamically describing the spatial and temporal changes of soil organic matter cycle. Meanwhile, the further researches on models should be strengthen for providing theory basis and foundation in making policy of green house gas emission in China.  相似文献   

泡桐木材仿红木染色工艺的研究   总被引：6，自引：0，他引：6  

陈玉和  陆仁书  杨洪义 《林产工业》2001,28(4):17-19

对家具贴面用单板进行染色试验，通过正交方法就木材染色主要因素ＮａＣｌ、乙酸、染料浓度等和它们之间的交互作用对染色单板色差的影响进行了系统地研究。泡桐单板仿红木色最佳染色工艺参数是ＮａＣｌ浓度１．５％、染料浓度０．５％、乙酸浓度２％、渗透剂浓度０．１％、染色温度９０℃和染色时间４ｈ。  相似文献   

马尾松,大头茶针阔混交林森林结构的研究     

周立江  蔡凡隆 《四川林业科技》1993,14(1):15-25

典型选样调查测定,分析马尾松、大头茶常绿针阔混交林的森林特征、种群结构、林分结构、生物量结构及生态功能。结果表明:1.该混交林是亚热带常绿阔叶林前一阶段的过渡性森林类型,在干扰状态下保持其相对的稳定性。2.复层、异龄现象是该混交林的主要特征。建群种充分利用了林地空间营养面积,发挥了林地的生产潜力。叶面积指数达6.86～8.83,林分木材蓄积量达160～222m~3/ha,林分总生物量达114～163t/ha。其中,乔木层生物量达105～154t/ha。光照充足的林下,草本层生物量可达2.5t/ha,对庇护地表起到了最直接、最明显的作用,而调节林冠密度,可控制或促进草本层生物量的增长。3.此种混交林改善了森林立地的蓄水功能和贮水方式。林地土壤最大贮水量达2645～4100t/ha,降水贮存量达565～1256t/ha,林地枯枝落叶层饱和持水量达4589～8702kg/ha。该类型达到了生态与经济效益兼顾,可在我国南方亚热带山地各类工程造林中推广应用。  相似文献   

杉木人工林中微量营养元素的含量、积累和生物循环   总被引：4，自引：0，他引：4       下载免费PDF全文

傅金和  潘维俦 《林业科学研究》1990,3(3):280-285

微量元素在植物体内参与各种生理生化活动,其作用机制有很强的专一性,是植物正常生长发育所不可缺少和相互替代的。森林生态系统的养分循环中,也包括微量营养元素的循环。本文对杉木林中的微量元素(Fe、Mn、Zn、Cu、B)进行了研究,旨在了解杉木林生态系统中这些元素的含量、积累和分布状况,以及它们在系统中循环的规律,以期进一步完善  相似文献   

Influence of Ammoniacal Copper Quaternary treatments on mechanical properties of blue-stained Lodgepole Pine wood   总被引：1，自引：0，他引：1  

江京辉任海青  吕建雄骆秀琴　吴玉章 《林业研究》2007,18(3):213-216

Three concentrations （2.8%, 2.0%, 1.2%） of Ammoniacal Copper Quaternary （ACQ） was selected to treat Lodgepole pine wood for evaluating ACQ treatment on mechanical properties of blue-stained wood. The bending modules of elasticity （MOE）, modules of rupture （MOR）, toughness and shearing strength parallel to grain on tangential surface, are tested according to the criteria GB1927-1943-91. Non-treated sample were also tested according to the same procedure. The results showed that the three groups specimen impregnated by different concentrations of ACQ solution met the AWPA standard 2003 of America （UC4A 6.4g/cm^3）. There were significant difference of toughness between treated wood and non-treated wood （p=0.01）, but there were no statistically significant differences among three concentrations in terms of toughness, and toughness of treated wood was approximately 20% lower than non-treated. MOR, MOE as well as sheafing strength parallel to grain were found to be not significantly different between treated wood and non-treated one, and there were no statistically significant difference among three concentrations of ACQ too. Toughness, MOR, MOE and sheafing strength parallel to grain increased with decrease of concentration of ACQ, but they were hardly affected by ACQ preservatives.  相似文献