文章基本信息

标题：THE STUDY OF GLOBAL LAND SUITABILITY EVALUATION: A CASE OF POTENTIAL PRODUCTIVITY ESTIMATION FOR WHEAT
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作者：Guoxin Tan
期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2000
卷号：XXXIII Part B4 (/1-3)
页码：1045-1050
出版社：Copernicus Publications
摘要：In this paper, a GIS based global land suitability evaluation methodology is introduced. This methodology is combined GIS spatial analysis technique with a land evaluation methodology termed Agro-Ecological Zoning (AEZ) and a simulation model developed by FAO for calculating crop potential maximum biomass and yield. It divides global area of land into smaller grids, and calculates crop potential productivity by taking account of the crop characteristics, the climatic factors of radiation and temperatures within the growth periods together with the actual photosynthesis capacity of wheat and the fraction of the net biomass. Due to the potential maximum yield is mainly determined by temperature and precipitation characteristics, a new straightforward approach to interpolating weekly average air temperature and precipitation aided by monthly climatologically at unsampled points in space from weather-station observation is proposed. Finally a case of global potential productivity estimation for wheat is tested. Weekly average temperatures and precipitation are interpolated with quality control model from weather station network with time series of daily maximum, minimum temperature and precipitation. The growth period in which climate will permit rain-fed crop production and global wheat potential productivity is determined. The computed values of net biomass production and yield show the potential productivity estimation methodology is actually possible to be used for global land suitability evaluation
关键词：Agriculture; Biomass; Quality Control; Evaluation; GIS; Simulation