Extra-early crisp jujube and its cultivation techniques

"extra early crisp honey king jujube" is a rare variety of early maturing fresh jujube in China. The tree potential of the variety is medium, the angle opens naturally, the branches do not grow too long, the fruit is cylindrical, the fruit face is white in the crisp ripening stage, the fruit face is bright red in the full ripening stage, the single fruit weighs about 30 grams, the fruit size is uniform, the kernel is small and the meat is thick, and the edible rate is about 98%. It also has the following characteristics:

1. The maturity is very early.

The mature period is in late July, which is about 1 month earlier than that of Lizao jujube. It is a very early-maturing fresh jujube variety.

2. The fruit is very large

The average weight of a single fruit is about 30 grams, with a maximum of more than 100 grams, the same size as a pear jujube.

3. Strong disease resistance and stress resistance

The variety is resistant to drought, fruit cracking, fruit drop, anthracnose and rust, barren and saline-alkali resistance.

4. Preterm delivery and high yield

This variety has self-flowering and fruiting and high fruit setting rate. In general, the fruit can be planted in the same year, the plant yield can reach about 2.5kg in the second year, and the yield can reach more than 1500 kg in the third year.

5. Excellent quality

The fruit is beautiful in color, sweet, crisp and juicy, without residue, and the sugar content in the mature period is more than 30%, and its quality is comparable to that of winter jujube.

6. Main points of cultivation

The main results are as follows: (1) where jujube trees can be planted in the south and north of China, they can be planted by ridging, with a ridge height of about 20 cm, 110 plants planted in 667 square meters, and a row spacing of 2 meters × 3 meters.

(2) pruning: the seedlings planted in the same year are mainly pruned in summer. Each plant has only 4 bud points, and the trunk is about 50 cm high. When the jujube head grows to 8 Mel 9 secondary branches, the jujube head should be knocked off. In the second year, it is best not to hang fruit, remove all the secondary branches and re-issue the main branches. when there are 9 secondary branches (that is, fruiting branches), remove the jujube head. In this way, the tree crown can be formed in the second year and enter the high-yield period in the third year.

(3) Tree type: mainly happy heart type and two-layer type.

(4) Fertilizer and water management: fertilization is mainly in autumn, after ditching and burying farmers, about 5000 kg of farm manure is applied in 667m2; 0.3% urea is sprayed before 8: 00 a.m. or after 5: 00 p.m.; foliar fertilizer or growth regulators or trace elements are sprayed once a week from falling flowers and fruits to fruit expansion, so as to increase fruit setting rate, promote fruit expansion and improve fruit quality.

(5) pest control: when clearing the garden in winter, spray Baumedu stone sulfur mixture three times before sprouting to kill overwintering bacteria and eggs; spray pyrethroid insecticides once during germination to prevent insect pests; after fruit setting to before fruit expansion, spray Bordeaux or Tetrandrine and anthrax every 10 days to control jujube rust and anthracnose.