Through the field experiment,we explored the dynamics of photosynthetic characteristics of jujube leaf in different growth period under the seven treatments of plant growth regulator.The rescearch results showed that net photosynthetic rate of red jujube leaf was decreasing with the development of growth period.High concentrations of gibberellin could inhibit the photosynthesis of red jujube.However,the first treatment (20 mg/L 5-ALA + 2 mg/L Na2SO4) and the sixth treatment (5 mg/L-ALA + 2 mg/L Na2SO4 GA3 + 10 mg/L GA3 + 15 mg/L CPPU) could significantly improve the net photosynthetic rate of jujube plants and excessively prevent water loss by transpiration,meanwhile,they also could not only regulate stomatal conductance of jujube leaves but also reduce the stomatal limitation of it.At later growth stages of jujube,we could use advantages of 5-ALA and CPPU to buffer adverse effect of high concentration of gibberellin on jujube,it had the feasibility of realistic significance.
NETL
NSTL
万方数据
维普
