Application of GIS and integrated mathematic models on estimating forest land wood productiveness and solar energy use efficiency Photosynthetic Responses of Sch im a supe rba Grown in D ifferentL ight Reg imes of Subtropica l Evergreen Broadleaf Forest Estimation of Solar Energy Use Efficiency and Spatiotemporal Pattern in Guangdong Based on Multitemporal NOAA-AVHRR NDVI and GIS Methods