Research on Influence Factors and Prediction Model of Transpiration Intensity of Semilate Rice at None-water Layer of Paddy

摘要

a field experiment was conducted to study prediction models of rice transpiration intensity at three different growth stages (including jointing booting, heading to flowering and milk stage) at none-water layer. Correlation analysis and stepping multiregression analysis suggested that soil moisture content of root zone, temperature in the field, . relative humidity and wind speed were the four main factors affecting the transpiration intensity of semilate rice. Error analysis also showed that the multi:linear regression models of transpiration established based on soil moisture content and major meteorological factors at three different growth stages were satisfying, and the maximum relative errors are 4.39%, 1.71% and 2.81% respectively. Research results establish a basis for the calculation of semilate rice water requirement at none-water layer of paddy.