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首页> 外文学位 >Biophysical Drivers of Tree Crop Performance in Shade Agroforestry Systems: The Case of Coffee in Costa Rica.
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Biophysical Drivers of Tree Crop Performance in Shade Agroforestry Systems: The Case of Coffee in Costa Rica.

机译：遮光农林业系统中树木作物生长的生物物理驱动力：哥斯达黎加的咖啡案例。

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摘要

Agroforestry production methods present one option for addressing growing concerns about the long term sustainability of intensive coffee production techniques. A study was designed to compare the effects of fertilization and shading from two leguminous species, Erythrina poeppigiana and Chloroleucon eurycyclum, on coffee grown at a Costa Rican research site. Coffee below biannually pruned, conventionally fertilized Erythrina exhibited the highest photosynthetic performance under both low and high light levels as well as greater biomass and higher N concentration. Soil P did not affect coffee performance, although shade trees on sites with higher soil P fixed more N compared to trees grown on low P sites, most of which were not found to be fixing. Results suggest shade mechanisms are the most important drivers of coffee adaptation in coffee agroforestry systems, though proper soil nutrient management and legume species pairing also appear to augment coffee response to microclimate conditions.
机译：农林业生产方法为解决人们对密集咖啡生产技术的长期可持续性日益增长的担忧提供了一种选择。一项研究旨在比较哥斯达黎加研究基地种植的两种豆科植物 Erythrina poeppigiana 和 Chloroleucon eurycyclum 对施肥和遮光的影响。在低光和高光条件下，每半年修剪一次的，常规施肥的<斜纹>刺桐表现出最高的光合作用性能，以及更高的生物量和更高的氮浓度。土壤P不会影响咖啡的性能，尽管与土壤P较低的树种相比，土壤P较高的树荫下的树苗固氮能力更高，而大多数情况下，树荫下的树不会固着。结果表明，遮荫机制是咖啡农林业系统中咖啡适应性的最重要驱动力，尽管适当的土壤养分管理和豆类物种配对也似乎增强了咖啡对微气候条件的响应。

著录项

  • 作者

    Campbell, Leslie.;

  • 作者单位

    University of Toronto (Canada).;

  • 授予单位 University of Toronto (Canada).;
  • 学科 Agriculture Agronomy.;Agriculture Plant Culture.;Physical Geography.
  • 学位 M.Sc.
  • 年度 2012
  • 页码 119 p.
  • 总页数 119
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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