Development of an agroforestry site classification model

关于场地资源和土壤退化状况的具体知识是规划和设计亚热带和热带可持续土地利用的关键先决条件。然而，现有的立地分类系统没有充分考虑立地潜力和土壤退化状况。该研究项目的目标是为厄瓜多尔南部热带雨林地区的天然林和牧场和演替下的森林砍伐地区开发一个农林业场地分类模型。利用在圣弗朗西斯科山谷试验区进行的系统性场地测绘的结果，将根据关键剖面和主要土壤组（WRB）确定和评估具有代表性的场地类型和场地组，并辅之以全球土地退化评估系统分类（环境规划署）的具体调整标准。此外，还将通过施肥实验确定提高牧场生产力和土壤肥力的潜力，以确定牧场的可持续承载能力;这项研究将与厄瓜多尔合作大学Universidad Técnica Particular de Loja UTPL合作进行。将确定主要区域特定地点和农林土地使用单位，并开发地理信息系统支持的地点分类模式。

The specific knowledge about the site resources and the degradation status of soils is a key prerequisite for the planning and the design of a sustainable landuse in the subtropics and tropics. However, site classification systems available do not consider the site potentials and the degradation status of the soils sufficiently. The objective of the research project is to develop an agroforestry site classification model for the rain forest region of Southern Ecuador in natural forests and deforested areas under pasture and succession. Using the results of a systematic site mapping in the pilot region of the valley San Francisco representative site types and site groups will be defined and assessed based on key profiles and major soil groups (WRB) and complemented by specific adapted criteria of the GLASOD-classification (UNEP). Additionally the potential for improvement of pasture productivity and soil fertility will be determined in a fertilization experiment in order to determine the sustainable carrying capacity of the pastures; this research will be carried out in cooperation with the Ecuadorian partner university Universidad Técnica Particular de Loja UTPL. Dominant region-specific site and agroforestry landuse-units will be defined and a GIS-supported site classification model developed.