Relationship between Net Photosynthetic Rate of Siji Pomelo and Its Physo-ecological Factors

By using the methods of simple relative analysis, deflective analysis, path analysis and stepwise regression equation, a study was carried out of the relationship between the net photosynthetic rate of Siji Pomelo and its physo-ecological factors. The results are as follows: the last method is the best one and the third is better. It is stomatal condustanse to H_2O (Cond). internal CO_2 concentration (Ci), leaf-to-air vapor presser deficit (Vpd1) and photosynthetically active radiation (PAR) that have affected the net photosynthetic rate. Interrelation of physo-ecological factors are also analysed with the last method.