共查询到18条相似文献,搜索用时 328 毫秒
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我局是一个中型林业企业,每年大约有6.0×10~4Rm~3的伐区剩余物被火烧或堆积腐烂,不仅浪费了资源,而且影响了迹地卫生。为了扭转这种状况,我局先后与其它省、地区建立了联营企业,为枝丫材综合利用创造了有利条件。一、剩余物利用的方式为了进一步搞好伐区剩余物的利用,我局于1985年改革了伐区管理体制,实行了两段验收制度。即集材结束后,进入第一阶段验收:清林结束后进行第二阶段验收。在第 相似文献
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谈综合,合理,节约利用森林资源 总被引:1,自引:0,他引:1
本文通过对我国森林资源现状及林业面临的主要问题的分析。提出了大力开展木材综合利用,特别是伐区剩余物的综合利用:合理利用木材,做到材尽其用:节约利用木材,延长木材使用寿命三点建设性意见 相似文献
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《林业机械与木工设备》1976,(2)
我国是一个少林国家,木材生产是一条短线,供需矛盾较大。积极开展伐区剩余物和加工剩余物的综合利用,充分合理利用森林资源是解决木材供需矛盾最有效,最有前途的重要措施。用浅区剩余物和加工剩余物加工成的工艺木片是木浆造纸和人造板工业的很好原料。 相似文献
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广泛利用伐区剩余物,提高木材利用率是林区治危兴林的关键措施。文章介绍了伐区剩余物利用现状及存在的问题、潜力和优势以及前景。桃山林业局利用伐区剩余物已获得了可观的经济、社会和生态效益。 相似文献
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合理利用伐区剩余物是解决能源短缺的有效手段,伐区剩余物收集成型设备可自动高效收集利用伐区剩余物。压缩机构是伐区剩余物收集成型设备中一个重要的组成部分,它的功能直接影响装置的运行。介绍伐区剩余物收集利用技术的现状;通过对木捆运动状态的分析,得出压缩机构螺旋轨道的枉坐标方程,是装置工作效率、螺旋轨道圈数及柴油机选取的依据。 相似文献
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加速发展木材综合利用,是解决木材严重不足的重要途径。 79年我省生产原木422万m~3,其中直接用于加工的原木为187.4万m~3,加工剩余物综合利用率仅10.5%,还有70多万m~3加工剩余物未能合理利用。相当于我省23个森工采伐企业79年原木总产量的1/4左右。此外,大约还有100万m~3的伐区剩余物尚未开发利用。 相似文献
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《Scandinavian Journal of Forest Research》2012,27(6):559-567
Abstract Methodology to assess the potential for energy wood procurement in Russia is described in this article and applied to the Leningrad region. Wood from thinnings, logging residues, non-industrial roundwood and residues from sawmilling are considered as sources for energy production. Energy wood available in the region, based on the 2004 actual cut, is approximately 4 million m3. Nearly 86% of this is non-industrial roundwood and felling residues, and 14% is by-products from sawmilling. Almost two-thirds of the non-industrial roundwood and felling residues are in cutting areas and one-third is in central processing yards. Deciduous tree species (birch and aspen) dominate in energy wood, representing about 65% of the total amount of felling residues and non-industrial wood. It is possible to intensify utilization of forest resources and thereby also to increase the use of wood in energy production. The total amount could be 54% higher if the allowable cut was fully utilized and 124% higher if thinnings were also utilized completely. There are, however, significant intraregional differences, as the current rate of utilization of forest resources varies in the region. 相似文献
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影响桉树插穗生根的几个因素研究 总被引:5,自引:0,他引:5
通过6年的桉树扦插育苗研究,总结出影响插穗生根有6个因素:(1)母株来源,组培苗作母株的插穗比扦插苗作母株的生根状况好;(2)母株年龄,母株在1-3年生时采穗条扦插生根率高;(3)穗龄,桉树穗条上长有3-4对成熟叶时扦插成活率高;(4)穗条留叶面积,在扦插不良季节,桉树扦穗留叶至1/3面积的生根率最高,而地扦插良好季节,桉树插穗留叶至2/3面积生根率最高;(5)扦插季节,桉树扦插最佳季节为每年的11月份至次年的4月份;(6)植物生长调节剂,吲哚丁酸(IBA)作生根激素使用效果比萘乙酸(NAA)好。 相似文献
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Satoshi Yamashita Tsutomu Hattori Shin Abe Hideaki Goto Hiroki Sato 《Journal of Forest Research》2014,19(1):143-153
Improvement cutting, which decreases tree density by cutting and thinning while leaving logging residues, has been practiced on Okinawa Island since the 1970s and changes not only the vegetation composition but also the amount and composition of woody debris on the forest floor. To quantitatively compare the effect of improvement cutting with the effects of woody debris and vegetation on the community structure of aphyllophoraceous fungi, we conducted a field survey of vegetation composition, the amount and composition of woody debris, and the aphyllophoraceous fungi flora on Okinawa Island in December 2006. We established 3 plots in forest stands without logging and 13 plots in a forest that had undergone improvement cutting from 1 to 22 years before our field survey. The number and volume of woody debris tended to be highest soon after improvement cutting. We recorded 1,172 fungal samples belonging to 81 species in four orders. Fungal species richness was correlated with the composition of the woody debris. Fungal species composition in forest plots 1 year after improvement cutting differed from most of the other logged forests. Variation partitioning revealed that the effects of improvement cutting explained 14.1 % of the total variation in fungal species composition, and that differences in woody debris and vegetation not related to improvement cutting explained 40.4 %. Changes in the composition of woody debris caused by improvement cutting explained at most 2.7 % of the variation. This suggests that improvement cutting does not have a strong effect on fungal community structure, but woody debris does. 相似文献
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小兴安岭低质林改造后小径木和采伐剩余物综合利用探讨 总被引:1,自引:0,他引:1
通过对小兴安岭低质林改造过程中产生的中小径木和采伐剩余物研究,分析中小径木和采伐剩余物的产生量,提出其利用途径和价值。结果表明:改造采伐时产生的大径木、中径木、小径木、短小材和薪材的出材量分别为1.13m^3/hm^2、32.15m^3/hm^2、38.30m^3/hm^2、4.79m^3/hm^2和12.68 m^3/hm^2,中小径木和薪材的出材量较高;改造地每公顷中小径木直接出售可获得6.5万元的收入。采伐剩余物总量为16.92 m^3/hm^2。小径木除了直接销售外,还可加工成拼版材、压缩木、重组木和单板层积材等。采伐剩余物可加工成木片,再根据不同的工艺加工成刨花板、纤维板、木丝板及纸张等用途。中小径木和采伐剩余物的综合利用可有效利用林区资源,提高林区经济效益。 相似文献