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Study on Limited Irrigation Based on Crop Water Production Function

Author: SunShuHong
Tutor: FengPing；WangYangRen
School: Tianjin University
Course: Hydraulic Engineering
Keywords: Insufficient irrigation Crop water production function Model parameters Insufficient irrigation system
CLC: S274
Type: Master's thesis
Year: 2005
Downloads: 335
Quote: 5
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Abstract


Insufficient irrigation ( No Full irrigation ) or limited irrigation ( Limited irrigation ) is a water-saving irrigation technology in recent years been widely in research and actively promote the goal of non- sufficient irrigation of the limited water resources for irrigation to produce the greatest economic benefits. The study of inadequate water supply under the conditions of the law of crop evapotranspiration and crop water production function is to formulate a prerequisite of Deficit Irrigation . For meteorological, hydrological and soil conditions of the Tianjin area in Tianjin Agricultural Irrigation Experiment Station the phased wheat , corn, cotton and other major crops affected by the drought test , received a three-year non- sufficient irrigation experiment observation data . Soil water movement under insufficient irrigation theoretical analysis of experimental data , to establish the the insufficient irrigation conditions under crop evapotranspiration model . Crop water production function with Jensen model , the experimental data and analysis of water deficit on crop yield , using multiple regression analysis to solve the model parameters . The article gives three major field crops of wheat, corn , cotton and other non - full irrigation system has been developed , and different non- full water-saving irrigation system stimulation effect compared . Insufficient water resources under the conditions of the irrigation system of multi-stage optimization method using dynamic programming method . The results of this study , cell experiments show that , in the case of output can reach 90% of the production under insufficient irrigation , the irrigation water savings of 40 % ; crop water productivity 1.9-2.0kg/m3 . If further research and extension to provide strong technical support for the acute shortage of water resources in Tianjin region of high efficiency water .

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CLC: > Agricultural Sciences > Agricultural Engineering > Irrigation and water conservancy > Irrigation system and management
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