| Abstract:In view of the Nanchang frequently suffer from seasonal drought, by choosing typical year and carrying out rice non-sufficient irrigation experiment, to define the optimal irrigation model and establish rice water-production function.The first chapter, analyze the topic research background, purpose, development trend at home and abroad, content and method.The second chapter, using rainfall frequency analysis and drawing Pearson type frequency curve, through fuzzy priority ratio theory based on multi-factor weighting choosing typical representative year to provide the basis for the next chapter. Through rice irrigation data, counting the water demand regulation to provide the basis for irrigation experimental research.The third chapter, according to the the typical years and irrigation mode, from full use of rainfall and the perspective of reducing irrigation water, setting different irrigation treatments to carry out the experimental research, focusing on rice yield in the different soil conditions in typical year.The fourth chapter, on the basis of different irrigation treatments calculating reference crop transpiration and rice transpiration under the condition of non-sufficient irrigation, analyzing the rice water sensitivity index, establishing the rice water-production function conforms to climate and soil characteristics of Nanchang. |
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