Effects of different calcium treatments on fruit cracking and fruit mineral elements of Junzao
To study the effects of different calcium preparations on fruit cracking epidermal structure and the mineral elements in the peel,and pulp of fruit EDTA-Ca solution and calcium chloride(CaCl2)solution were sprayed on Junzao at different stages of growth and development.The results showed that 1)Calcium spraying treatment could effectively reduce the fruit cracking rate,and the effect of spraying EDTA-Ca solution was better than spraying CaCl2 solution.2)Calcium spraying treatment could significantly increase the content of mineral elements such as Ca,K,P,Fe,Zn and B in Jujube fruits,In addition,the treatment effect of spraying EDTA-Ca solution at the white ripening stage was the best.3)The thickness of the epidermis,stratum corneum,and wax layer increased after calcium spraying,among which,spraying EDTA-Ca solution was more conducive to the increase of epidermal thickness,spraying CaCl2 solution was more conducive to increasing the thickness of stratum corneum,compared with spraying EDTA-Ca solution had bet-ter anti-cracking effect.In summary,spraying exogenous calcium can reduce the fruit cracking rate and increase the content of mineral elements in the fruit.