Jintan Crisp Jujube

Jintan Crisp Jujube

　　1. Appraisal No.: Su Jian Guo 201112

　　2. Origin and Type: Developed through bud mutation selection of "Pearl Jujube" by the Jintan Economic Crops Research Institute in 2003, it is a fresh-eating jujube variety.

　　3. Suitable Area: Suitable for cultivation in jujube-producing regions of Jiangsu.

　　4. Yield Level and Characteristics

　　The average yield at three years old is 950 kg per mu, and at four years old is 1132 kg per mu. The tree has an open canopy and straight trunk. Trees at three years old are about 3.5 meters tall. Mature old branches are grayish-white and glossy, while current-year branches have brownish-red mature parts. The fruiting wood is small, leaves are dark green, glossy, relatively large, broadly ovate-lanceolate, with long, acuminate tips and fine wavy serrated margins. Stipular spines are short, and branches aged two years or more are nearly spineless. Flowering is moderate, with medium to large flowers and cream-yellow petals. The fruit is oblong, averaging 13.8 grams per fruit, with a maximum weight of 25.1 grams. In the Jintan area, the fruits ripen in late August.

　　5. Key Cultivation Techniques

　　1. Control vegetative growth during the flowering period and perform heavy pinching.

　　2. Spraying 5–10 ppm gibberellic acid during full bloom helps improve fruit set.

　　3. For open-field cultivation, dig drainage ditches between rows and keep the soil moist before maturity.

　　4. Rain-sheltered cultivation is recommended if conditions allow.