• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>South-East European Forestry >Windthrow Resistance of Norway Spruce (Picea abies /L./ Karst.) Forest Cultures - Preliminary Results
【24h】

Windthrow Resistance of Norway Spruce (Picea abies /L./ Karst.) Forest Cultures - Preliminary Results

机译：挪威云杉（Picea abies /L./ Karst。）森林文化对风的抵抗力-初步结果

获取原文
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Background and Purpose: Forest damage by wind is an important cause of economic loss in commercial forestry in the Republic of Croatia, as well as in many other European countries. Thus, windthrow resistance of trees represents a significant issue. Spruce forest cultures have shown the lowest resistance to windthrow so far. Nevertheless, there is not much insight into the relationship between trees and stand resistance to wind in the region. The objectives of this paper are to: (i) provide first evidence of the relation between tree characteristics prior to storm event in completely destroyed stands in comparison to slightly damaged stands, (ii) to evaluate the need to consider tree resistance to winds during thinnings, (iii) to evaluate if there is a need for windthrow stability assessment prior to replacement interventions. Materials and Methods: The paper investigates three individual cases of spruce forest cultures on three localities in the hilly part of Central Croatia in the fifth decade of age. Two of three stands were completely destroyed by the storm event during the year 2013. The experiment was established in the spring of 2010 using randomised block design with three replications. Based on total tree height (H) and diameter at breast height (DBH) the following parameters were calculated: wood volume (V), basal area (B) and slenderness coefficient. Descriptive statistics and correlation analyses were made in STATISTICA 8.2. Results: The results show overstocking, unfavourable structure and unfavourable slenderness coefficients (80:1) in both cultures which were completely destroyed by wind. The correlation among variables revealed a significant relationship for all localities (p Conclusions: Research supported the claim that slenderness coefficient and stand structural analysis can be good predictors of damages caused by wind. With respect to the forthcoming increase of frequency and severity of storm events we propose to take evaluation of tree resistance into consideration prior to all silvicultural activities (especially high intensity interventions such as replacement/regeneration). Improved stability of trees against wind should be a silvicultural goal already from the first thinning (higher intensity thinings from below). In the case of unstable stands canopy cover should be opened cautiously to provide the remaining trees an opportunity to slowly respond to space increase. It should be noted that these initial findings should be supported by a more extensive research in the future.
机译：背景和目的：风对森林的破坏是克罗地亚共和国以及许多其他欧洲国家的商业林业经济损失的重要原因。因此，树木的防风性能是一个重大问题。到目前为止，云杉林文化对风的抵抗力最低。然而，对该地区树木与林分抗风性之间的关系了解甚少。本文的目的是：（i）提供第一份证据，证明完全毁坏的林分中风暴事件发生之前树木特征与轻微受损的林分之间的关​​系，（ii）评估在疏伐期间考虑树木抗风的必要性，（iii）在更换干预措施之前评估是否需要进行风掷稳定性评估。材料和方法：本文调查了第五个年龄在克罗地亚中部丘陵地区三个地方的三个云杉森林文化的个案。 2013年，三分之二的展位被暴风雨完全摧毁。该实验于2010年春季进行，采用了随机设计的块状设计，并进行了三次重复。根据总树高（H）和胸高（DBH）的直径，计算出以下参数：木材体积（V），基础面积（B）和细长系数。描述性统计和相关分析在STATISTICA 8.2中进行。结果：结果表明两种文化中的积压，不利的结构和细长系数（> 80：1）均被风完全破坏。变量之间的相关性揭示了所有地区之间的显着关系（p结论：研究支持这样的说法，即细长系数和林分结构分析可以很好地预测风造成的破坏。关于即将发生的风暴事件的频率和严重性的增加，我们建议在所有造林活动（尤其是高强度干预措施，例如更换/再生）之前考虑对树木抗性的评估，从第一次伐木开始（从下面开始高强度伐木），提高树木抗风的稳定性就应该是一个造林目标。在不稳定林分的情况下，应谨慎地打开树冠覆盖层，以使其余树木有机会对空间的增加作出缓慢反应，应注意的是，这些初步发现应在将来得到更广泛的研究的支持。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号