Application of land quantified model in land use system

After the earlbration，the land quantified model(PS123)is used to analyze several factors of land use system such as the seeding date，irrigation scenario and biophysical potential production．The optimum seeding date is from the end of September to October．The irrigation amount is 180～240 mm and it is appropriate to irrigate 75～90 mm each time at the last part of the growing season．The biophysica1 poten tial yidd of Quzhou region is about llOlOkg／hm²．