| The newly developed plant regulator Z-S was sprinkled on the leaves of dry-land rice at the three-leaf stage, jointing stage and booting stage with different concentrations.The results showed: the transpiration rate, photosynthetic rate and stomatal conductance were all increased as compared with CK;the tiller number, 1000-grain weight and yield were also increased significantly, and those of the low concentration treatment was the highest.The PAR use efficiency was increased significantly by the low concentration treatment in the middle filling stage, showing that suitable Z-S concentration could increase the photosynthetic rate and yield of dry-land rice. |