• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Agriculture, Ecosystems & Environment: An International Journal for Scientific Research on the Relationship of Agriculture and Food Production to the Biosphere >Soil erosion and erosion thresholds in an agroforestry system of coffee (Coffea arabica) and mixed shade trees (Inga spp and Musa spp) in Northern Nicaragua
【24h】

Soil erosion and erosion thresholds in an agroforestry system of coffee (Coffea arabica) and mixed shade trees (Inga spp and Musa spp) in Northern Nicaragua

机译：尼加拉瓜北部的咖啡（阿拉伯咖啡）和混合树（Inga spp和Musa spp）的农林业系统中的土壤侵蚀和侵蚀阈值

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

Soil erosion by water is one of the main environmental problems in tropical mountain regions of Central America. Agroforestry systems have been shown to reduce erosion through their canopy cover and their contribution to the litter layer. This paper analyzes the influence of the cover and height of coffee strata and mixed shade trees, the ground cover (weeds and litter), the slope gradient and various soil features and characteristics relevant to erosion in six farms that apply the agroforestry system of coffee growing (Coffea arabica) with mixed shade trees of Musa spp and Inga spp. We determine the corresponding erosion thresholds, i.e. the value (erodibility factor) beyond which the reduction in erosion becomes statistically significant. A purpose-designed verification method was applied to determine whether the thresholds corresponded to the effective control of erosion. The study area is located in the hills around El Cua, in northern Nicaragua, an area with a humid tropical climate and a mean annual rainfall of 2770 mm. An analytical method, based on the use of visual indicators, was used to analyze soil erosion by water. This approach enabled us to replicate the method in a sufficiently large number of cases for the results obtained to be considered reliable and representative of the study area. These results indicate that in the agroforestry system examined, for the cultivation of coffee and mixed shade trees (Musa spp and Inga spp), an average of 10.4% of the area is affected by erosion. The erodibility factors identified were litter layer and slope gradient. The first of these factors accounted for 66% of the variability of erosion, compared with 4% in the second case. The erosion threshold value was between 60 and 65% of the litter layer; beyond this level, the reduction in erosion was statistically significant. With this threshold, the soil was relatively little affected by erosion, around 13% of the cultivated area. (c) 2015 Elsevier B.V. All rights reserved.
机译：水土流失是中美洲热带山区的主要环境问题之一。农林业系统已显示出通过其冠层覆盖和对垫料层的贡献来减少侵蚀。本文分析了六个采用咖啡种植农林业系统的农场对咖啡层和混合遮荫树的覆盖度和高度，杂草和杂草的地面覆盖度，坡度以及与侵蚀相关的各种土壤特征和特性的影响。 （阿拉伯咖啡）与穆萨（Musa spp）和印加（Inga spp）的混合阴影树。我们确定相应的腐蚀阈值，即腐蚀减少量在统计上变得有意义的值（易蚀性因子）。应用了专门设计的验证方法来确定阈值是否对应于侵蚀的有效控制。研究区域位于尼加拉瓜北部El Cua周围的山丘上，该地区热带气候湿润，年平均降雨量为2770毫米。一种基于视觉指标的分析方法被用于分析水土流失。这种方法使我们能够在足够多的情况下复制该方法，以使所获得的结果被认为是可靠的，并代表了研究领域。这些结果表明，在所研究的农林业系统中，对于咖啡和混合遮荫树（Musa spp和Inga spp）的种植，平均面积受到侵蚀的影响为10.4％。确定的易蚀性因素是垫料层和坡度。这些因素中的第一个占侵蚀可变性的66％，而第二种情况则为4％。侵蚀阈值在垫料层的60％到65％之间;超过此水平，侵蚀减少在统计学上是显着的。达到此阈值后，土壤受侵蚀的影响相对较小，约为耕地面积的13％。 （c）2015 Elsevier B.V.保留所有权利。

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