• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >The ecological, economic and political effects of tree plantation intercropping on small farm forestry in the Atlantic lowlands of Costa Rica.
【24h】

The ecological, economic and political effects of tree plantation intercropping on small farm forestry in the Atlantic lowlands of Costa Rica.

机译：哥斯达黎加大西洋低地的植树造林对小型农场林业的生态，经济和政治影响。

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 present study is an inter-disciplinary effort to assess the potential role of intercropping, the practice of introducing agricultural crops into the early stages of tree plantations, in improving the success of small farm reforestation in the Atlantic lowlands of Costa Rica. The second chapter uses a series of experimental plots established on-station and in farmers fields to examine the biological interactions between two native tree species (Hyeronima alchorneoides (O) and Vochysia guatemalensis Sprague) and cassava (Manihot esculenta Crantz), a common intercrop. Special attention is given to the affect of weeds and weed control on the nature of these interactions. The third chapter uses a linear programming model of household decision making, based on the results of the first chapter, to examine the profitability of intercropping under different household conditions. It focuses on the effects of changes in household labor availability, land quality, and capital availability on the returns to intercropping. In the fourth chapter, the results of surveys and interviews of reforesters are used to compare the predictions and results of the first two chapters, with actual intercropping practices in the region. The household characteristics which resulted in the greatest benefits from intercropping in the linear programming model were also good predictors of who actually intercropped. Intercropping also significantly increased the level of plantation maintenance. The chapter ends by examining the different ways in which households have used intercropping to facilitate a transition from pasture or agriculture to forestry production. The final chapter places these household decisions in a broader political ecology context. It examines the local ecological, economic and political conditions created by state and non-governmental actors interested in promoting reforestation, and how they have affected small farmers in the region. Particular attention is given to the question of why these actors have ignored or discouraged the use of intercropping by farmers, and how the farmers have responded to these efforts.
机译：本研究是一项跨学科的工作，旨在评估间作的潜在作用，即将农作物引入树木种植的早期阶段的实践，以改善哥斯达黎加大西洋低地小农场的植树造林的成功。第二章使用在农场和农民田间建立的一系列试验田，研究了两种本地树种（Hyeronima alchorneoides（O）和Vochysia guatemalensis Sprague）和木薯（Manihot esculenta Crantz）之间的生物相互作用。特别要注意杂草和杂草控制对这些相互作用的影响。第三章基于第一章的结果，使用线性决策模型进行家庭决策，以检验不同家庭条件下间作的盈利能力。它着眼于家庭劳动力的可获得性，土地质量和资本可获得性的变化对间作回报的影响。在第四章中，将对再造林者的调查和访谈结果用于比较前两章的预测和结果以及该地区的实际间作作法。在线性规划模型中，从间作中获得最大收益的家庭特征也是预测谁间作的良好预测。间作也显着提高了人工林的维持水平。本章以研究农户间作以促进从牧场或农业向林业生产过渡的不同方式作为结尾。最后一章将这些家庭决策置于更广泛的政治生态环境中。它研究了有兴趣促进重新造林的国家和非政府行为者创造的当地生态，经济和政治条件，以及它们如何影响该地区的小农。特别关注以下问题：为什么这些行为者无视或不鼓励农民使用间作，以及农民如何响应这些努力。

著录项

  • 作者

    Rheingans, Richard David.;

  • 作者单位

    Yale University, School of Forestry and Environmental Studies.;

  • 授予单位 Yale University, School of Forestry and Environmental Studies.;
  • 学科 Agriculture Forestry and Wildlife.; Biology Ecology.; Economics Agricultural.
  • 学位 D.F.
  • 年度 1996
  • 页码 195 p.
  • 总页数 195
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 森林生物学;生态学（生物生态学）;农业经济;
  • 关键词

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