Effect of K Spray on Stomatal Characteristicsand Photosynthetic Rate

Effect of K spray on stomatal conductance were showed,the stomatal conductance increased almost all times in day ,the peak of stomatal conductance emerge earlier and it return its back very fast also.There was no influnce on the photosynthetic rate,but in a day it makes the peak of photosynthetic rate emerge earlier.K spray will improve photosynthetic rate in different period.In all growth period,spring five times are very effect.The photosynthetic rate is positively correlated to the stomatal conductance.