sunshine time
4.With orthogonal polynomial the relationship between middle-season rice yield and meteorological factors (air-temperature,precipitation,sunshine-time)during ear differentiation, heading and seeding stage of middle-season rice over the years in Jingzhou City was analysed.
5.Based on 2003-2004 year meteorological observation data, digital elevation model (DEM), MODIS remote sensing NDVI and EVI data of image, the relationship of precipitation and temperature factor with geographical space position, elevation, sunshine time and vegetation index (NDVI, EVI, i.e. the lower cushion character) was analyzed by utilizing Geographical information system (GIS), remote sensing (RS), mathematics statistical method and Kriging space interpolating value technology.

