木束条尺寸对杉木积成材性能的影响研究

为了探索较佳的木束条尺寸,以提高杉木积成材的质量,研究了不同尺寸的杉木木束条对杉木积成材性能的影响规律,结果表明:木束条的长度对杉木积成材的纵向静曲强度、弹性模量、24h吸水厚度膨胀率有较大的影响;木束条的厚度对杉木积成材纵向静曲强度、弹性模量的影响不大,但对24h吸水厚度膨胀率、内结合强度有较大的影响;木束条的宽度对杉木积成材的物理力学性能影响极小,不存在统计意义上的影响;木束条的较佳尺寸为:长度120 mm,宽度4mm,厚度2.5 mm.     

杉木积成材制造工艺研究

研究以杉木制材板皮为原料，采用梳解加工法制造杉木积成材的制板工艺。结果表明，密度为0．6g／cm^3，厚为16mm的杉木积成材，其较佳制造工艺为木束条含水率6％-9％，施胶量8％-9％，热压压力2．0MPa，热压温度160℃。热压时间10min。     

杉木积成材薄木贴面工艺初探

采用正交试验法，探讨了杉木积成材薄木贴面的工艺过程。试验结果表明：利用杉木积成材进行薄木贴面．工艺切实可行，奥古曼薄木贴面的较佳工艺参数为：热压温度100℃，热压压力1．0MPa，热压时间4min，涂胶量120g／m^2。     

浙江新技术大幅提高杉木利用率

浙江升华云峰新材股份有限公司和浙江林学院联手，开展对杉木材的边角废料的回收利用研发．经过5年多的反复试验．终于成功开发生产出一种新型积成材，从而使此类木材的综合利用率从过去的65％提高到95％以上。这种积成材不仅能替代当前家装行业普遍使用的细木工板，     

不同炭化温度下杉木生物炭产率及特性比较

为探讨炼山后杉木各组分残余物性质特征,以杉木不同组分(枝、叶、皮、根)为试验材料,运用室内模拟方法,采用限氧升温炭化法,进行杉木各组分在不同的炭化温度下所得生物炭的特性比较研究。结果表明:随着炭化温度的升高,杉木各组分的生物炭的产率和水分逐渐降低,而灰分含量逐渐增加,其中在300~400℃温度范围内,杉木枝、根、皮、叶的生物炭的产率的降幅最大,分别达到33.22%、33.50%、32.85%、40.68%;杉木各组分生物炭的N、C含量皆随着炭化温度的升高而增加,而以杉木叶的生物炭(LC)N、Mg含量最高,最大分别达到1.71%、33.48 g·kg-1;在同一炭化温度下,杉木枝的生物炭(BC)的C含量明显高于其他组分生物炭,杉木皮的生物炭(WC)的Fe、Ca含量高于杉木其他组分生物炭。     

无醛大豆基胶黏剂细木工板热压工艺研究

以热压温度、热压压力、施胶量为影响因素设立正交试验,采用杉木芯板和桉木单板为原料,测试产品的横向静曲强度和浸渍剥离长度,对无醛大豆基胶黏剂细木工板热压工艺进行了研究。结果表明:当杉木板芯厚度为11.5 mm、桉木单板厚度为2.6 mm、热压时间为8 min时,最佳工艺参数为热压温度125℃、热压压力1.2 MPa、单面施胶量250 g/m2。各因素对细木工板力学性能和耐水性能影响的主次为施胶量热压温度热压压力。     

杉木间伐材及制材板皮加工研究现状与高效加工的新途径

简述了杉木间伐材及制材板皮加工研究的现状,特别是杉木间伐材改性与制造人造板的研究情况,着重介绍了杉木间伐材及制材板皮高效加工的新途径--采用梳解加工法制造杉木积成材的研究情况.     

高温水供热干燥速生杉木方材

运用高温水供热系统干燥速生杉木方材。生产性试验表明，6天内初含水率为55．5％的杉木方材干至始含水率5．4％，干燥质量符合细木工板生产的要求（少数高含水率木材除外）。此干燥法集中供热，具有热效率高、运行安全和经济可行等特点。     

竹材径向动态力学性能研究

采用动态热机械分析仪研究了竹材不同部位制得的径向竹篾的动态热力学性能。结果表明:测试频率对竹材径向的动态热力学性能影响较小;竹材不同部位制得的径向竹篾的储能模量(E′)均随着试验温度的升高而逐渐降低,损耗模量(E″)和损耗角正切都随着试验温度的升高而逐渐上升;三种径向竹篾的玻璃化转变温度值非常接近,储能模量的大小顺序为:基部径向竹篾中部径向竹篾梢部径向竹篾;在径向竹帘胶合的生产中增大梢部径向竹篾的使用量,有利于提高其耐温能力。     

利用超声波检测杉木抗弯弹性模量

以大尺寸杉木板材为研究对象，通过超声波测试仪对其动态弹性模量进行无损检测及用微机控制电子式木材万能试验机测试其静曲弹性模量，并分析了两种试验方法测定结果之间的关系。结果表明：（1）杉木板材的静曲弹性模量E1和动态弹性模量E2之间呈线性相关，不同厚度的试样无论是作为独立样本还是合并成总体样本空间，其相关性都非常显著，相关系数为0．75～0．95；（2）各种规格的杉木静曲弹性模量平均值E1与动态弹性模量平均值E2的比值E1／E2受杉木板材的厚度影响较小，其值为0．768～0．837。     

杉木间伐材生产层压板工艺研究

本文探讨了利用小径杉木间伐材生产建筑模板用材──层压板的生产方法与工艺条件；并研究了各种工艺参数对产品性能的影响，确定了生产层压板的较佳工艺条件。     

粤北地区杉木真菌性病害种类

对粤北地区 ( 小坑林场、龙山林场、大坑山林场 ) 杉木（Cunninghamia lanceolate）真菌性病害进行全面调查,共采集 86 份标本,分离病组织获得菌株 162 份,主要归属于炭疽菌属（Colletotrichum）、拟盘多毛孢属（Pestalotiopsis）、腐皮壳属（Diaporthe）、镰刀菌属（Fusarium）、黑孢菌属（Nigrospora）、拟茎点霉属（Phomopsis）、叶点霉属（Phyllosticta）以及散斑壳属（Lophodermium）等。根据病害症状粤北地区主要杉木病害包括：杉木立枯病、杉木炭疽病、杉木溃疡病、杉木顶枯病、杉木梢枯病、杉木赤枯病、杉木球果坏死。各林场杉木林中,杉木炭疽病普遍发生、分布广;种子园中杉木球果病害危害严重,直接影响球果的产量和质量;在大坑山林场 4-5 年生的林分中,杉木顶枯病大面积发生,但在其它地区少有发生;此外,杉木溃疡病、杉木赤枯病和杉木立枯病在个别无性系或者苗圃中零星发生,但危害较轻。     

杉木间伐材生产胶压木工艺的初步研究

本文探讨了利用小径杉木间伐材生产建筑结构用材——胶压木的生产方法与工艺条件,并研究了各种工艺参数对产品性能的影响,确定了生产胶压木的较佳工艺条件。     

C and N stocks under three plantation forest ecosystems of Chinese fir, Michelia macclurei and their mixture

Chinese fir (Cunninghamia lanceolata), a type of subtropical fast-growing conifer tree, is widely distributed in South China. Its plantation area covers more than 7 × 10⁶ hm², accounting for 24% of the total area of plantation forests in the country. In recent decades, the system of successive plantation of Chinese fir has been widely used in southern China due to anticipated high economic return. However, recent studies have documented that the practice of this system has led to dramatic decreases in soil fertility and forest environment as well as in productivity. Some forest ecologists and managers recognize the ecological role performed by broadleaf trees growing in mixtures with conifers, and a great deal of studies on mixture effects have been conducted, particularly on mixture species of temperate and boreal forests, but these research results were not completely consistent. Possibilities include dependence of the mixture effects in large part to specific site conditions, the interactions among species in mixtures and biological characteristics of species. Although some researchers also studied the effects of mixtures of Chinese fir and broadleaf tree species on soil fertility, forest environment and tree growth status, little information is available about the effects of Chinese fir and its mixtures with broadleaves on carbon and nitrogen stocks. The experimental site is situated at the Huitong Experimental Station of Forest Ecology, Chinese Academy of Sciences, Hunan Province (26°40′–27°09′ N, 109°26′–110°08′ E). It is located at the transition zone from the Yunnan-Guizhou Plateau to the low mountains and hills of the southern bank of the Yangtze River at an altitude of 300–1,100 m above mean sea level. At the same time, the site is also a member of the Chinese Ecosystem Research Network (CERN), sponsored by the Chinese Academy of Sciences (CAS). This region has a humid mid-subtropical monsoon climate with a mean annual precipitation of 1,200–1,400 mm, most of the rain falling between April and August, and a mean temperature of 16.5°C with a mean minimum of 4.9°C in January and a mean maximum of 26.6°C in July. The experimental field has red-yellow soil. After a clear-cutting of the first generation Chinese fir (Cunninghamia lanceolata) plantation forest in 1982, three different plantation forest ecosystems, viz. mixture of Michelia macclurei and Chinese fir (MCM), pure Michelia macclurei stand (PMS) and pure Chinese fir stand (PCS), were established in the spring of 1983. A comparative study on C and N stocks under these three plantation forest ecosystems was conducted in 2004. Results showed that carbon stocks were greater under the mixtures than under the pure Chinese fir forest and the pure broad-leaved forest, and the broadleaves and the mixtures showed higher values in nitrogen stocks compared with the pure Chinese fir forest. The spatial distribution of carbon and nitrogen stocks was basically consistent, the value being greater in soil layer, followed by tree layer, roots, understory and litter layer. The carbon and nitrogen stocks in soil layer were both highly correlated with the biomass in understory and litter layer, indicating that understory and forest litterfall exerted a profound effect on soil carbon and nitrogen stocks under plantation ecosystems. However, correlations among soil carbon, nitrogen stocks and below ground biomass of stand have not been observed in this study. Translated from Acta Ecologica Sinica, 2005, 25(12): 3,146–3,154 [译自: 生态学报]     

立木芯胶合门板的研制

以杉木间伐材为原料锯切成小木芯块作为胶合门的芯层材料，研究了立木芯胶合门生产工艺参数对产品性能的影响，确定了优化的生产工艺条件。     

杉木中幼龄林计量施肥校验研究

在测定土壤平衡解吸磷和土壤钾位缓冲容量的基础上，根据林木施肥的立地养分效应模型法，结合林分的目标生物量等，提出了中等立地条件下杉木中幼龄林的施肥量，并进行了校验试验．结果表明：中等立地条件下的杉木中幼龄林，单施氮肥对胸径和蓄积量生长有显著影响，但增大氮肥用量对生长无促进作用．单施磷肥虽有利于杉木胸径生长，但对杉木蓄积量生长无显著影响，增大磷肥的施用量对蓄积量的生长无促进作用．施用钾肥对杉木生长无显著促进作用．试验区杉木中幼龄林合适的施肥量是：氮１２０ｋｇ／ｈｍ２，磷３０ｋｇ／ｈｍ２，钾１５０ｋｇ／ｈｍ２．     

杉木优良无性系早期选择

对广东省于１９９３－１９９４年营造的１２块杉木无性系测定林的３－４年生材料进行分析,结果显示：有２／３以上的试验林的生长性状方差分析结果达到较显著差异水平以上,最优无性系的树高为最劣无性系的１．６４倍－３．３３倍,表明这些试验林中的无性系间存在着显著的遗传差异,且优、劣无性系间生长差异极为悬殊;经综合评选,从１１３１个参试无性系中,初步筛选出１０３个优良无性系,其平均树高增益达１３．９８％,其中Ｇ     

杉木炭化前后化学成分变化的研究

研究了杉木炭化前后化学成分的变化情况。分析了杉木经160、190、220℃炭化后,苯-醇抽提物、木质素、纤维素、综纤维素及1%NaOH提取物含量的变化。研究表明:随着炭化温度的升高,苯-醇抽提物、木质素含量呈现上升趋势;纤维素含量总体上呈下降的趋势,综纤维素的含量也呈现下降的趋势,比纤维素的下降要明显;1%NaOH提取物的含量稍微上升。炭化温度较高时,木材内部的营养成分破坏越严重,木材的防腐性能越好,但强度有所下降;炭化温度较低时,能够更好的保持木材的强度及性能,因此应根据实际需要来选择木材的炭化温度。