The results indicated that the appropriate concentration of PGR-S-Y (T2) significantly increased the SPAD, the utilization rate of CO2 and the Photosynthetic rate (Pn) respectively, and restricted the midday depression
The results indicatedthat the appropriate concentration of PGR-S-Y (T2) significantly increased the SPAD, the utilization rate of CO2 andthe Photosynthetic rate (Pn) respectively, and restricted the midday depression