Based on C.T.de Wit & F.W.T.Penning de Vries's modelling methodology and fundamental frame of L1D and TIL modules of MACROS,a dynamic simulation model of quality indexes in rice population suitable to local soil,climate and other varietal characters was conducted according through field trials and documental data.By running the model,the optimum combinations of seedling age,transplating date and the number of transplated seedlings with corresponding optimum indexes of rice population quality were obtained...