• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Scottish Forestry >The species composition and structure of the old conifer plantations at Loch Ossian, Courrour, North Scotland, a century after their establishment
【24h】

The species composition and structure of the old conifer plantations at Loch Ossian, Courrour, North Scotland, a century after their establishment

机译：针叶林建立后一个世纪，北苏格兰库罗尔的奥西安湖针叶林人工林的物种组成和结构

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Loch Ossian plantations on the Corrour Estate are the result of pioneering attempts in the late nineteenth and twentieth centuries to afforest an extensive area of upland moorland on nutrient-poor soils and exposed sites in the central Highlands of Scotland. The wide range of species tested and the establishment methods developed at Corrour helped to lay the technical foundation for extensive afforestation in upland Britain in the second half of the last century. Aspects demonstrated at Corrour included the importance of cultivation and fertiliser input to successful tree growth, and the suitability and vigour of Sitka spruce when grown on such sites. In the 1950s these plantations became the location of one of the trials initiated by EdinburghUniversity to investigate and monitor aspects of the transformation of even-aged plantations to irregular forestry. Unfortunately, changes in management meant that the trial was abandoned during the 1980s and some parts of the trial were clearfelled. However, an inspection in late2011 revealed that some compartments of the old trial area had survived largely intact: these represent some of the oldest planted stands of non-native conifers in upland Britain. A survey was undertaken in spring 2012 to examine the development of thesestands since the last measurements in the 1970s. The results showed the continued impressive growth of these plantations with many conifers of about 100 years of age exceeding 60 cm diameter and several trees were over 40 m in height. The stands had become less diverse since the 1970s in terms of both species and of structure, although the evidence for the latter was less certain. Spruces were the dominant species group representing nearly 85 per cent of all trees compared with around 79 per cent in 1971. Sitka spruce comprised around 90 per cent of this group and was also the commonest component of the natural regeneration present in many stands. A lack of thinning over the last 30-40 years had produced stand structures that were comparatively uniform with little vertical differentiation. These stands were also seriously overstocked compared either to management table predictions for even-aged stands or to the requirements of an approach seeking to produce irregular stand structures such as Continuous Cover Forestry (CCF). As a consequence; these stands could be at increasing risk of catastrophic windthrow. Future management options for these old stands and the surrounding matrix are considered as well as their implications for maturing conifer plantations elsewhere in upland Britain.
机译：在Corrour庄园的Los Ossian种植园是在19世纪和20世纪末进行的开拓性尝试的结果，该尝试是在营养贫瘠的土壤和苏格兰中部高地的裸露地带上开垦大片高地荒地。在科罗尔（Corrour）进行了广泛的测试物种和建立方法，为上世纪下半叶英国高地造林奠定了技术基础。在Corrour上展示的方面包括栽培和肥料输入对树木成功生长的重要性，以及在这样的地方种植Sitka云杉的适宜性和活力。在1950年代，这些人工林成为爱丁堡大学发起的一项试验的地点，该试验旨在调查和监测均匀老化的人工林向不规则林业的转化方面。不幸的是，管理上的变化意味着该审判在1980年代被放弃，而且审判的某些部分显然被取消了。但是，2011年末的一次检查显示，旧试验区的一些隔间在很大程度上完好无损：这些是英国高地非原生针叶树中种植最久的林分。 2012年春季进行了一项调查，以调查自1970年代的最后一次测量以来这些摊位的发展。结果表明，这些人工林的生长持续令人印象深刻，许多针叶树龄约100年的针叶树直径超过60厘米，几棵树的高度超过40 m。自1970年代以来，林木的种类和结构都变得越来越多样化，尽管后者的证据还不确定。云杉是占主导地位的树种，占所有树木的近85％，而1971年约为79％。锡特卡云杉占该树种的90％左右，也是许多林分中自然更新的最常见组成部分。在过去的30至40年间，由于缺乏稀疏性，因此林分结构相对均匀，几乎没有垂直差异。与管理表预测的平均年龄的林木相比，或与试图生产不规则林木结构的方法（如连续覆盖林（CCF））的要求相比，这些林木也严重积压。作为结果;这些看台可能会遭受更大的风灾风险。考虑了这些旧林和周围基质的未来管理方案，以及它们对英国高地其他地方成熟的针叶树人工林的影响。

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