Dali county has enjoyed the reputation of "southern litchi, winter jujube on the temple" since ancient times. The average fruit weight of Dali Dongzao is 17.5g, and the maximum fruit weight can reach 25g, which looks like an apple and is called "small apple". The skin is red and bright, thin and crisp, sweet and fragrant, and rich in nutrition. Dali county belongs to a warm temperate semi-arid continental monsoon climate zone.

The average annual temperature 13.4℃, the average daily temperature difference 12.6℃, the annual effective accumulated temperature ≥ 10℃ of 43 12℃, the annual sunshine hours of 2385.2 hours, the accumulated temperature and illumination are the highest in Guanzhong, with abundant light and heat resources, flat terrain and soil.

Specific production methods of Dali winter jujube

1, "one prevention, two guarantees and three promotion" cultivation techniques

Preventing Green Blindness stinkbug in the Germination Stage. Spraying 3-5 Baume sulfur mixture or 600-800 times of copper rosin before germination; Spraying 70% imidacloprid 7000 times and 1500 times pyrethroid pesticide mixture at germination stage to control green blindness stinkbug. Keep flowers and fruits. Spraying gibberellin 20mg/L +0. 1% borax+3,000 times of Aizengmei (propionyl brassinolide) combined with "opening nails" in full bloom to improve the fruit setting rate, and taking measures such as coring and thinning after fruit setting to protect the fruit.

"one promotion" fruit expansion period. After the hard-core period in July and August, topdressing 50 kilograms of phosphorus and potassium fertilizer per mu, and irrigation to promote fruit expansion; "second, promote" the early ripening of jujube fruit, and adopt the method of "controlling nitrogen, supplementing micro and increasing phosphorus and potassium" after the expansion period to promote the early ripening of jujube fruit; "Three promotion" tree nutrient accumulation, timely application of base fertilizer after fruit picking, and application of 2500 kg organic fertilizer+100 kg diammonium phosphate per mu to promote tree nutrient accumulation and lay a good foundation for high yield in the coming year.

2, the cultivation modes are diverse, and the shelf life is prolonged.

The unique light and hot water resources have created the diversity of cultivation modes of Dali winter jujube, which can be divided into greenhouse, greenhouse and open field. Greenhouse cultivation is closed in early January and mature in late July. Greenhouse cultivation will be closed in late February and mature in early August; The maturity of winter jujube in the open field is in late September. The shelf life has been extended, and winter dates are listed from late July to1February every year, which avoids the risk of centralized listing of winter dates and improves economic benefits.

Refer to Baidu Encyclopedia-Dali Dongzao for the above contents.