期刊
PADDY AND WATER ENVIRONMENT
卷 1, 期 2, 页码 91-97出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s10333-003-0017-0
关键词
Hydrologic model; Rainfed paddy field; Rice yield model; Water deficits
In northeast Thailand, the rapid expansion of rainfed paddy fields has decreased the stability of rice production. This paper describes a model that computes rice production on the basis of the hydrologic conditions of rainfed paddy fields on hill slopes. The model well expressed the hydrologic processes, rice yield, and production at the study site. We simulated rice production as uphill paddy plots are abandoned, increasing catchment area, under various rainfall conditions. The simulation showed that rice yield and stability increase as uphill plots are abandoned, although the total rice production decreases. Thus, the effect of catchment size on rice production in each plot was quantified. The model proved to be useful for analyzing rainfed rice production under various land and water conditions.
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