Effects of foliar fertilizer spraying with different nutrient elements on the fruit shrinkage disease and quality of Ziziphus jujube
In order to investigate the effects of foliar fertilizer with different nutrient elements on the incidence of fruit shrinkage disease and quality of Ziziphus jujube(Jingcang1),the incidence and yield of fruit shrinkage disease of Ziziphus jujube were investigated in different foliar fertilizer treatment groups,and the fruit appearance and nutrition indexes were measured.The results showed that the incidence of fruit shrinkage disease of Ziziphus jujube was significantly decreased under foliar fertilizer treatment with different nutrient elements,and the fruit yield and commercial rate of Ziziphus jujubem were increased by 8.73%-27.21%and 3.53%-17.94%,respectively,compared with control group.Except for B,E and F treatment,there was no significant difference in fruit hardness between other treatment and CK treatment.Foliar fertilizer treatment with different nutrient elements had no significant effect on fruit color difference parameters.Foliar fertilizer treatment with different nutrient elements had positive effects on the accumulation of titrable acid,soluble sugar,soluble protein,ascorbic acid,total phenols and flavonoids in Ziziphus jujube fruits.Overall,nitrogen foliar fertilizer has significant effects on reducing the incidence of fruit shrinkage disease and increasing the fruit yield,titrable acid,soluble protein,and total phenolic content,manganese has significant effects on increasing fruit yield,hardness,soluble sugar and flavonoid content,potassium foliar fertilizer has no significant effect on the overall effect,boron foliar fertilizer has significant effect on increasing the fruit yield and the content of titrable acid,soluble protein and ascorbic acid.This study can provide theoretical basis and scientific reference for the control and quality control of Ziziphus jujube fruit shrinking disease.