Effects of Fruit Load on Sugar/Acid Quality and Puffiness of Delayed-Harvest Citrus

Delayed harvesting technology is believed to improve the citrus fruit flavor, but improper tree load under delayed harvest might cause puffiness and reduce quality. In order find out an optimum level obtain better flavor quality as well in delayed-harvest protected cultivation, experiments were conducted present study between 2019 2020 determine effect of different loads fruit-bearing per single branch on soluble sugars organic acids metabolism peel flesh, anatomical structure matured peel, texture-related indexes. The results suggested significant negative correlations leaf N flesh sucrose glucose contents, P citric acid contents; no correlation NPK levels texture; relatively lower higher can increase accumulation slow down degradation greater extent, thus optimizing sugar/acid ratio fruits during harvest. lignification parenchyma cells closely around secretory cavities due ascorbic deficiency be primary for low-load treatments.