Study On The Optimizing Models Of Cotton Drip Irrigation Schedule With Plastic Mulch

This paper is based on the analyzing and summarizing the national and international theory and technology of drip irrigation, adopted the technology method of combining the theory analyzing and field experiments . According to the two years'experimental data from 2003 to 2004, Evaluated the location of observation tube , calculated the wet proportion in drip soil. Established the correlativity between reference crop evaporation (ETo) and daily average temperature (T), sunlight hour(N1), wind speed(W), relative humidity(RH). Established the model of water consuming of soil water reservoir in drip irrigation. The results of field tests and model forecast were satisfied. Therefore these models can provide a practical and convenient method for forecasting irrigation quantity and date. Accordingly these models can offer scientific basis for scientific design and crop irrigation management.