Effects of Spraying Calcium Nitrate and NAA on the Storage Quality of Figs “Bo JiHong”

Abstract

This study aimed to improve the storage quality of figs by determining how spraying calcium nitrate on fig fruits and naphthaleneacetic acid (NAA) on leaves before plucking the fruits affect their storage quality. Storage experiments were performed on 4-year-old Bo JiHong, and results showed that all treatments contributed to improving the fruits’ hardness and alleviating the changes in several factors, including fruit-rot rate, soluble solids, titratable acid, and vitamin C content. In particular, the change rates of these factors for the calcium-alone treatment group decreased by 0%–15%, 6.2%–27.1%, 13.4%–32.4%, and 29.5%–31.3%, respectively, compared with the control group. Meanwhile, the change rates for the calcium + NAA treatment group decreased by 55%–70%, 34.7%–50.7%, 27.8%–54.8%, and 35.2%–60%, respectively, compared with the control group. These finding indicated that the consumption of nutrients inside the fruits was greatly diminished, the fruit shape was maintained, and the storage quality of figs was enhanced. The optimal storage effect was achieved by applying 0.5% Ca(NO3)2 + 30 mg· L–1 NAA.