...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of arid environments >Restoring productive rangelands: A comparative assessment of selective and non-selective chemical bush control in a semi-arid Kalahari savanna
【24h】

Restoring productive rangelands: A comparative assessment of selective and non-selective chemical bush control in a semi-arid Kalahari savanna

机译：恢复生产牧场：半干旱卡拉哈里大草原中选择性和非选择性化学灌木控制的比较评估

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 chemical control of thickened woody savanna layers is a common practice applied in southern Africa to release the grass layer from competitive pressure and restore the economic viability of rangelands. We comparatively assessed the composition, density and production of the grass layer in relation to the woody vegetation structure following the selective control of increaser woody species (SC) and nonselective control of the whole woody layer (NSC) in a semi-arid Kalahari savanna. Vegetation states associated with bush-thickening preventative range management (PRM) served as a benchmark. The SC treatment created a well-structured woody layer and favored the development of a grassy savanna state with abundant valuable forage grasses, as found under PRM. Despite a high dry matter production and density of grasses, NSC rangelands appeared to be unstable. Results indicate that NSC facilitates the development of a dense woody recruitment layer that counteracts a favorable grass layer development. We conclude that SC is conditionally more effective in restoring a relatively stable and desirable bush grass ratio for commercial farming purposes, whereas NSC increases the risk of vegetation transition back to a bush-dominated state. While essential in combination with both treatments, NSC demands an increased effort of follow-up control of woody recruits. (C) 2016 Elsevier Ltd. All rights reserved.
机译：在南部非洲，化学控制增厚的木质稀树草原层是一种普遍的做法，可以使草层摆脱竞争压力并恢复牧场的经济生存能力。在半干旱的喀拉哈里大草原上，我们选择性地评估了增量木本物种（SC）和整个木本层（NSC）的非选择性控制，从而比较了与木质植被结构有关的草层的组成，密度和产量。与灌木丛增厚的预防范围管理（PRM）相关的植被状态作为基准。如PRM所述，SC处理产生了结构良好的木本层，并促进了草木稀树草原州的发展，该州拥有大量宝贵的牧草。尽管干物质产量高且草密度高，但NSC牧场似乎不稳定。结果表明，NSC促进了茂密的木质吸收层的发育，抵消了有利的草层发育。我们得出的结论是，SC可以有条件地更有效地恢复用于商业农业目的的相对稳定和理想的灌木丛比率，而NSC则增加了植被过渡回以灌木为主的状态的风险。尽管这两种治疗方法都必不可少，但NSC要求加大对新兵的后续控制力度。 （C）2016 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Journal of arid environments》 |2016年第12期|39-49|共11页
  • 作者

    Harmse Christiaan J.; Kellner Klaus; Dreber Niels;

  • 作者单位

    North West Univ, Unit Environm Sci & Management, Private Bag X6001, ZA-2520 Potchefstroom, South Africa|Dept Agr Land Reform & Rural Dev Northern Cape Pr, Eiland Res Stn, POB 37, ZA-8800 Upington, South Africa;

    North West Univ, Unit Environm Sci & Management, Private Bag X6001, ZA-2520 Potchefstroom, South Africa;

    North West Univ, Unit Environm Sci & Management, Private Bag X6001, ZA-2520 Potchefstroom, South Africa|Georg August Univ Gottingen, Dept Ecosyst Modelling, Busgen Inst, Busgenweg 4, D-37077 Gottingen, Germany;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Acacia mellifera; Arboricide; Bush encroachment; Rangeland management; Restoration; Tree-grass interactions;

    机译：东方相思;杀虫剂;灌木丛侵染;兰格兰群岛管理;恢复;树草相互作用;

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