共查询到20条相似文献，搜索用时 78 毫秒
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基于林区道路交通安全的资源救援策略探讨 总被引：2，自引：0，他引：2
作为道路交通安全问题,其不仅关系到车辆的正常安全运行,而且关系到发生灾害后救援工作能否顺利开展。针对南方出现的雨雪冰冻灾害,从保障道路交通运输安全的方面分析了道路交通对森林资源救援的影响,指出发生雨雪冰冻灾害时道路交通运输所显现的问题,并提出了几点改进的参考建议,包括加强林区道路交通灾害的预警、完善林区道路交通应急救援预案的制定与实施、做好汽车轮胎胎冠的安全技术措施、轮胎胎冠形态优化、提高发生灾害后的防护抢修能力和加强林区交通运输安全管理等,为今后的灾害救援、减少次生灾害提供一定的参考。 相似文献
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2008年11月12日，自治区林业局修订并印发了《广西壮族自治区林业局直属企事业单位安全生产事故应急救援预案》。 相似文献
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2021年,消防救援队接处警量创历史新高,而且救援范围越来越广、处置难度越来越大、风险隐患越来越高,支队级全勤指挥部作为一线灭火救援组织指挥的实体化机构,提前介入、全程跟踪、实地指挥显得尤为重要。从“专业化、信息化、实战化”3个角度,就如何高效安全地对每起灾害事故实现精准指挥、科学处置进行了探讨。 相似文献
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《绿色科技》2017,(14)
指出了随着旅游业的发展,探险旅游成为人们热衷的旅游方式,然而一些探险旅游系统尚未完善造成探险事故频发,解决探险旅游安全问题迫在眉睫。结合北斗卫星导航技术和安全应急救援平台设计了探险旅游系统——"探险之星",该系统主要包括用户中心、指挥中心和数据库技术中心三个模块。探险者通过用户中心可进行高精度定位查询、路径导航、天气预报,当发生意外事故,通过"一键呼救"、"亲友链接"可及时与救援队和亲人取得联系;探险区管理者通过指挥中心进行监控管理、实时天气情况推送、实时灾害预警推送、对意外事故进行遇难分析、救援调度,保证救援力量在第一时间投送到位;数据库技术中心向用户提供GIS服务平台、救援系统、医疗系统等功能。因此,"探险之星"为探险旅游发展提供了更先进便捷的服务,在探险旅游、户外活动、应急救援等领域有广阔的应用前景。 相似文献
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航空护林野外停机坪建设是林业以及应急救灾基本建设中的一项关键而重要的工作,是建设生态文明、保护森林资源、提升应急管理水平、推进森林防火治理体系和治理能力现代化的重要举措之一。分析了野外停机坪建设的必要性,介绍了野外停机坪建设原则、要求、内容和主要技术指标,并就野外停机坪建设过程和管理维护过程中的安全管理进行了探讨。最后,针对新时代森林防火形势要求,对野外停机坪建设的进一步管理与发展进行了分析和展望。 相似文献
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太白山自然保护区旅游安全管理现状及对策 总被引：1，自引：0，他引：1
对太白山自然保护区历年来发生的安全事故进行分析,导致事故发生的原因主要是游客不了解路况、缺乏野外生存经验、高山区通讯设施不健全、野外救援难度大.提出了太白山自然保护区旅游安全管理对策. 相似文献
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针对运输单位车辆生产完好率指标在生产，设备技术管理中存在的不准确性问题，以及不能起初地反映运输车辆的稳定完好程度，而提出使用车辆技术完好率指标，来解决这一问题。同时反映运输车辆的本质完好程度，以取代车辆完好率指标。 相似文献
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A. Lehtijärvi H. T. Doğmuş‐Lehtijärvi A. G. Aday Kaya S. Ünal S. Woodward 《Forest Pathology》2017,47(6)
Although several Armillaria species have been reported in Turkey, there is little information about their ecology in Turkish forests. In this study, we investigated five forest stands, approximately 5–74 ha in size, in Kastamonu province in the Black Sea Region of Turkey for the presence of Armillaria species in stumps and logs. The stands were mixed Abies nordmanniana ssp. bornmülleriana and Pinus sylvestris forests managed using a selective cuttings system; the proportion of fir in the total number of stems and stumps ranged from 36 to 98%. Based on sequence analysis of the internal transcribed spacer and intergenic spacer regions of the rDNA, all rhizomorphs sampled from the stumps and logs were of Armillaria ostoyae. The size of the genets was estimated with random amplified microsatellites analysis of the isolates and ranged from single stumps to approximately 450 m2. One to seven genets were found in each stand. These results indicate that the genets had arisen from spores and vegetative spread was limited on most sites. 相似文献
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通过对上海松江中央公园内65株特大银杏树白蚁为害情况的调查,发现该公园银杏受害率为100%,其中存在活白蚁的银杏占总量的56.9%,采用毒土处理、粉剂疗法、建立白蚁监测点等措施,经过两次灭杀,活白蚁的灭杀率达到92.3%和93.3%,从而使存在活白蚁银杏树的比例从56.9%下降到2.7%,白蚁发生情况明显降低。
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建平半干旱地区石质山地造林技术研究 总被引：1，自引：0，他引：1
研究了不同植物在石质山地的造林成活率、土壤化学性质随造林年限的变化和造林措施对土壤化学性质和植物胸径、树高年净生长量的影响。结果表明：不同植物在石质山地的成活率在21%～85%之间,其中白榆和沙打旺的成活率分别为81%和85%,而小叶杨、刺槐、栾树的成活率均在70%左右;植被能明显提高石质山地不同土层的有机质、全N、P2O5含量,但提高程度随土层深度、养分种类和造林年限的不同而不同;在同一土层,生物复合肥料、菌剂和保水剂均显著提高土壤有机质含量（p〈0.01）并显著降低土壤P2O5含量（p〈0.01）;只有保水剂可引起土壤全K含量的明显升高;生物复合肥料、菌剂和保水剂均显著提高白榆、小叶杨、刺槐、栾树树高和胸径的年净生长量,但保水剂的提高程度最高。 相似文献
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植物经常暴露在各种生物和非生物的胁迫之下,这些胁迫会影响植物的生长发育和繁殖并最终导致植物死亡。为了抵御不利的环境条件,植物已经进化出复杂而精细的网络来感知胁迫并激活防御系统。为此,植物激活许多信号转导通路,这些信号转导通路可以改变一些胁迫响应基因的表达,从而引起植物形态、生理和生化的改变以适应逆境。DNA胞嘧啶甲基化是高等真核生物的主要表观遗传机制之一,在维持基因组稳定性和调节基因表达方面起着关键作用。表观遗传变异比遗传变异更为灵活。一旦环境条件发生变化,为了适应新的环境植物都会发生表观遗传的改变。许多研究表明DNA甲基化参与植物的发育和应激反应。基于相关研究对DNA甲基化进行了综述,对植物逆境胁迫有重要意义。 相似文献
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《Scandinavian Journal of Forest Research》2012,27(6):530-542
Abstract The success of natural regeneration on patch clear-cuts in Norway spruce stands in Southern Finland was examined in terms of stocking and tree height. The experiment was established in mature spruce stands in the submesic Myrtillus (MT) site type. In each of the eight study sites, three plots were treated with clear-cutting and planting, clear-cutting with partial tree retention and planting, and patch clear-cutting without site preparation, respectively. In three of the study sites, one plot with patch clear-cutting and site preparation was established. Each plot was 1 ha, out of which three patches of 40×40 m were clear-cut in the patch treatments. 10–11 years after cutting, the patches had on average 1316 crop trees ha–1, of which 91% were spruces. Some 27% of the stands were up to the target stocking level (≥1600 ha?1), and 36% were at least satisfactory (≥1300 ha?1). Site preparation did not yield greater stocking levels on patches, but that result is ambiguous due to a difference in initial stocking. The average spruce tree height in the patches (0.76 m) was much smaller than in the case of clear-cutting and planting (2.42 m). In conclusion, the patches had been restocked tolerably well with spruce and birch for practical purposes during the 10- to 11-year period, but the regeneration process had been very slow compared to clear-cutting and planting. 相似文献
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The study focused on the success of regeneration on patch cuts in spruce-dominated stands in terms of stocking and tree height. It was based on an experiment in the Kainuu region in northern Finland. The experimental design included 8 stands with 58 clearcut patches of variable size (0.09–0.37?ha), on which either natural regeneration without site preparation or site preparation and planting of Scots pine was applied. A regeneration survey was conducted 13–15 growing seasons after treatments. Patches without site preparation had been restocked quite well from natural seed sources. The average number of trees was about 11,000?ha?1, of which 1700?ha?1 crop trees. With site preparation and planting, the stocking levels were also very high, 25,000 and 2100?ha?1, respectively. One hundred percent of the planted patches and 75% of the naturally regenerated patches had an acceptable density. Restocking was equally good across the range of patch sizes. Tree growth had been somewhat slower in the smallest patches than in the largest ones in the range. Natural regeneration was capable of yielding good regeneration results in most patches, especially when site preparation was applied. Stocking levels and height development were higher yet in the planted patches. 相似文献
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Keisuke Kojiro Yuzo Furuta Makoto Ohkoshi Yutaka Ishimaru Misao Yokoyama Junji Sugiyama Shuichi Kawai Takumi Mitsutani Hiromasa Ozaki Minoru Sakamoto Mineo Imamura 《Journal of Wood Science》2008,54(6):515-519
To investigate the changes in microstructures of wood with elapsed time in the environment, CO2 adsorption onto dry wood was measured at ice-water temperature (273 K) for samples aged from 0.1 years to over 1000 years.
The micropore size distribution was obtained using the Horvath-Kawazoe method. Micropores smaller than 0.6 nm in wood decreased
in number with elapsed time in the environment, and a negative correlation was found between cumulative pore volume for pores
smaller than 0.6 nm and elapsed time in the environment. Cumulative pore volume in the 1000-year sample was almost half of
that in the 0.1- year sample. Micropores smaller than 0.6 nm in wood with a few decades or more of elapsed time increased
in number after rewetting and drying. Consequently, microstructures of wood with longer time elapsed in the environment were
considered to be more stable, because of longer-term thermal motion and possibly more repeated moisture adsorption and desorption
and/or temperature variation in the environment. 相似文献
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