Rice drought identification method based on plant growth simulation and application

In order to analyze the regional temporal and spatial distribution law of rice drought,the classification standard of rice drought in the southern China is researched and determined.Based on water balance principle of farmland,a model to simulate water balance in rice growth process is established to simulate water cycling process of paddy field in rice growth period.The model can predict rice drought condition according to precipitation forecast and water storage condition of water conservancy projects,so as to grasp the occurrence,development and mitigation process of drought and make real-time monitoring and tracing of rice drought.The result shows that the drought simulation result is basically consistent with practical condition in the demonstration zone in Jiangxi province.The research achievements can provide technical support for rice drought prediction and pre-alarm,as well as a scientific base for drought fighting.