浅议企业资本结构调整

本文阐述了在市场经济条件下，如何选择资本结构，分析了影响企业资本结构的要素及企业资本结构调整的原因，提出了判断企业最佳资本结构的标准及企业资本结构调整的方法。     

关于林业产业结构调整的若干思考

分析了浙江林业产业结构现状，揭示了产业结构中所存在的一些普遍性问题，提出了结构调整的基本思路及相应的对策，以避免林业的大起大落，确保浙江林业产业健康地稳定发展。     

The effect of Tuber melanosporum Vitt. mycorrhization on growth, nutrition, and water relations of Quercus petraea Liebl., Quercus faginea Lamk., and Pinus halepensis Mill. seedlings

Mycorrhizal and nonmycorrhizal Quercus faginea Lamk., Quercus petraea Liebl., and Pinus halepensis Mill. one-year-old seedlings inoculated with Tuber melanosporum Vitt. have been analyzed with the purpose of studying the influence of mycorrhization on their growth, water relations, and mineral nutrition. The mycorrhization improved Q. petraea and P. halepensis seedling growth. In addition, the mycorrhization created an elastic adjustment in P. halepensis, although it did not cause any osmotic adjustment. Additionally, the mycorrhization increased phosphorus uptake in Q. faginea and P. halepensis, content of all nutrients in P. halepensis, and N content in Q. petraea.     

供热系统水力调节与节能

本文通过对分析水力失调的原因,提出改善办法,以便达到节能并改善供热品质。     

谈林场(所)规模调整的几个问题

本文从林业局林场(所)规模区划偏小所存在的问题入手,提出林场(所)区划调整的必要性,调整原则,基本做法和相应的资金来源,意在借助天然林保护工程全面实施的有利契机,进而解决多年来林场(所)规模区划不合理的现象。     

我国纤维板生产结构调整加快

我国纤维板生产线在不断发展变化,有新的生产线投入建设,有旧的生产线停运或转卖。截至2012年底,全国关闭、拆除或停产纤维板生产线累计达到162条,淘汰落后生产能力近500万m~3/a。我国纤维板行业已经进入了生产结构调整阶段。     

呼伦贝尔市林业建设布局的调整

文章通过对呼伦贝尔市自然条件和森林资源特点的分析,阐述了林业建设布局调整的必要性及主要措施。     

林产品结构调整方案的研究

本文按照联合国粮农组织林业署提出的林产品最新分类法，论证了我国东北林区各林业局生产的林产品结构应朝着畅销原木、胶合板、协议坯料、协议半成品或成品方向调整。实践证明，调整后的产品结构方案，不仅能提高企业的经济效益，而且还能提高可采蓄积的利用率。     

Influence of water-stress acclimation and <Emphasis Type="Italic">Tuber melanosporum</Emphasis> mycorrhization on <Emphasis Type="Italic">Quercus ilex</Emphasis> seedlings

Mycorrhizal and non-mycorrhizal holm oak (Quercus ilex L.) seedlings inoculated with black truffle (Tuber melanosporum) were grown under nursery conditions and subjected to drought hardening for 4 months in autumn and winter followed by irrigation for 10 days. Leaf water potential and stomatal conductance were monitored during the 4 months of drought. When the test was completed (March), measurements were made for each treatment (inoculated or non-inoculated), and watering regime (watered and water-stressed). Pressure–volume curves, osmotic potential at full turgor, osmotic potential at zero turgor and the tissue modulus of elasticity near full turgor were calculated. Mycorrhizal colonization and growth, and the content of the main mineral nutrients N, P, K, Ca and Mg were measured. Water stress affected plant growth, caused an elastic adjustment of the plant tissues, and decreased the P and K content, and inoculation improved the nitrogen content. Drought acclimation apparently achieved the goal of improving the drought tolerance of holm oak seedlings, without depressing ectomycorrhizal root colonization by T. melanosporum. José Antonio Rodríguez Barreal—Deceased     

大兴安岭林区发展林产工作结构调整思路

作者从林产工业发展的现状做切入点,详细分析了当地林业企业存在的主要问题,并围绕现存诸如管理、技术、人员等方面存在的弊端,提出以市场为导向,加大技术改造力度,实现以林产业产品的主导产品,林产工业的主导产业林产工业产品为主导产品的战略目标,使企业在国内、国际市场上提高竞争力。     

论思茅地区森林结构与森林生态经济系统优化

思茅地区是云南省的重点林区。针对现有森林结构不尽合理的问题,应用系统分析的方法,建立合理的森林结构模型。采用经济效益、生态效益、资源持续利用、林地稳定性能和生产率５个指标,对森林结构中的地类结构、林种结构、年龄结构和树种结构等进行了分析研究。对合理结构与现状结构的差距进行比较,并提出系统优化的措施,为该区林业可持续发展提供参考。     

水杨酸对盐胁迫下大豆生长和渗透调节能力的影响

砂基培养大豆,盐胁迫下进行水杨酸处理,NaCl和SA处理的预定浓度分别为0 0(对照)、100 0、100 0.3、200 0、200 0.3mmol/L。结果表明:SA处理后提高盐胁迫下大豆Pro、SS、AA和叶绿素含量;增强根系活力、硝酸还原酶(NR)活性。综合各项生长和生理指标表明,SA处理有利于增加渗透调节能力,减缓水分胁迫,缓解盐害;且SA对NaCl 100mmol/L处理的大豆生长缓解效应优于NaCl200mmol/L胁迫的。     

基于减少钻孔调机次数的衣柜旁板孔位标准化研究

孔位的设计及标准化是减少调机次数和调机时间的关键因素,将系统孔和结构孔同时定位在32mm系统的网格上并使其部分孔位前后对称、部分孔位上下对称,以实现左右板件孔位的互换,从而减少调机次数。     

西藏芒康滇金丝猴国家级自然保护区范围与功能区调整初探

针对西藏芒康滇金丝猴国家级保护区存在的原保护范围、功能区划不合理等问题,提出了保护区范围及功能区调整的原则与方案,并从影响评价方面论证了调整的可行性。     

林业分类经营与龙江森工生产力布局调整

本文通过对林业分类经营理论的背景及我国林业分类的具体情况进行分析，对黑龙江省森工林区的生产力布局中存在的问题给予了客观的阐述与分析，阐述了林业分类经营思想在指导林业发展方面的重要作用及森工生产力布局调整的方向。     

应用目标规划进行森林收获调整

将目标规划应用到山西省秋千林场的森林收获调整,通过对调整前后森林结构的变化分析,森林收获调整达到了预期的目标。故认为目标规划是解决森林收获调整的有力数学工具之一。     

玉环县森林结构调整规划研究

针对玉环县森林结构不合理，生态环境欠佳，抵御自然灾害能力弱的森林现状及沿海的立地自然条件。从提高山体绿化率，增加森林覆盖率，促使森林结构趋向合理，增强抗御自然灾害能力。充分发挥森林的生态效益着手，吸取以往森林经营的经验教训，着重对调整布局，树种选择，造林模式等进行研究。提出切实可行的规划方案和具体措施。     

Water relations of Eucalyptus nitens × Eucalyptus grandis: is there interclonal variation in response to experimentally imposed water stress?

This study tested the hypothesis that water stress increases the hydraulic efficiency of Eucalyptus nitens × E. grandis saplings as a result of osmotic and elastic adjustments. Eucalyptus nitens × E. grandis clones (NH00, NH58, NH69 and NH70) were potted in coarse river sand supplemented with a slow-release fertiliser, drip-irrigated four times daily and exposed to full sunlight for eight months. Thereafter, irrigation was withheld twice for seven consecutive days from half of the saplings of each clone, with a seven-day recovery period (regular irrigation) in-between. Relative soil moisture content did not correlate with stomatal conductance (g_s) at pre-dawn and at midday. Leaves of plants subjected to the water-stress treatment wilted in 7 d, and the reduction in g_s was significant at midday with no significant differences between clones. Stomatal conductance and all traits derived from pressure-volume graphs (e.g. osmotic potential at full turgor) were constant in the control treatment. There were no clear patterns in osmotic and elastic adjustments in both treatments. Root hydraulic conductance was constant between treatments and clones. However, water stress reduced shoot hydraulic conductance and stem hydraulic conductivity with significant interclonal effects. Plant biomass, leaf area and leaf weight ratio were significantly lower in the water-stressed plants, but there were no differences between the clones. In conclusion, the water-stress treatment did not introduce significant differences in stomatal conductance and tissue-water relations of Eucalyptus nitens × E. grandis clones. Interclonal variation in water-stress response was found in shoot hydraulic traits, and clone NH58 may be more suitable for planting across sites prone to moderate water stress.     

跑车木工带锯机卡木结构的改进

介绍了一种实用的跑车带锯机扎钩结构和跑车立桩的微调结构。使用该扎钧机构可提高原木加工效率，降低生产成本。     

黑龙江森林资源利用特点与结构调整

基于大量森林资源调查数据，对黑龙江省森林资源利用特点及其存在的问题进行了全面系统的分析。结果表明：黑龙江森林可采资源日趋危机，林分密度普遍偏低，成过熟林的消耗量远远超过生长量。森林生产力持续下降，森林结构严重失调，但天然更新良好。根据黑龙江省的实际情况，提出了合理的森林结构调整指标及森林经营的对策，为实现森林资源可持续利用提供了重要参考。