Exploring suitability for tropical crop cultivation in Hainan Island by SOTAL methodology

作     者：Zhang Xue-lei S.Mantel Zhang Gan-lin V.W.P.van Engelen 

作者机构：Institute of Soil ScienceCASNanjing 210008China International Soil Reference and Information CentreAJ Wageningen353-6700Netherlands) 

出 版 物：《Journal of Geographical Sciences》 (地理学报（英文版）)

年 卷 期：2001年第11卷第4期

页      面：40-46页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：UNDP Project CPR/96/105 "Sustainable Land Management for Agricultural Production in Hainan Province" 

主　　题：evaluation tropical crops HaiSOTER Hainan Island 

摘      要：A SOTER-based automatic procedure for qualitative land evaluation is developed. This procedure was created in the automated land evaluation system (ALES). The objective was to design a procedure that allows for a quick separation of potentially suitable from non-suitable SOTER units for the intended land use, indicating constraints to different kinds of land use. Different kinds of land are unequal1y suited to various uses, land eva1uation is the assessment of the suitability of a tract of land for a specified kind of land use. In practice this implicates the comparison (matching) between the requirements of a specified land use and the properties of the land. Land evaluation concepts and definitions are treated in the paper. The ALES is a computer program that allows land evaluators to build their own knowledge-based system with which they can compute the physical and economical suitability of map units in accordance with FAO framework for land evaluation. The ALES program works with so-called decision trees, being hierarchical multiway keys in which the leaves are results (e.g., severity levels of land qualities), and the interior nodes of the tree are decision criteria (e.g., land characteristic values). These trees are traversed by the program to compute an evaluation using actual land data for each map unit. SOTAL is a SOTER-based qualitative model developed in ALES for physical land evaluation in which presently three land utilization types (LUTs) are distinguished, i.e., cultivated banana, coffee and rubber under different input and technological conditions. These LUTs are characterized by 11 landuse requirements and evaluated by matching the land use requirements with the corresponding land qualities. The paper elaborates on the criteria used in SOTAL for land quality assessment and how a final suitability rating is achieved on the basis of the rated land qualities. Results are visualized through G1S-generated maps as products in response to the specific inf