Excellent fresh jujube variety-Youyou jujube

"Youyou jujube" is a new jujube variety selected from the local Youyou jujube variety resources in Zhuolu County, Hebei Province. It was examined and approved by Hebei Forest Variety approval Committee in December 2005.

Characteristic characteristic

The tree is open, dry, and the trunk and perennial branches are grayish brown and longitudinally split. The jujube head of the raw jujube was reddish brown, and the thorns were opposite at the jujube head and the jujube stock. Leaf blade broadly ovoid, dark green, glossy, medium large, thicker. Petals 5, red, calyx tube smaller, mostly closed. The fruit is long oval, slightly pointed at both ends, the vertical diameter of the primary fruit is 4.2-5.3 cm, the transverse diameter is 2.0-2.6 cm, the average single fruit weight is 12.3 grams, the maximum single fruit weight is 20.8 grams, and the size is uniform. The pericarp is bright red and the fruit surface is smooth. The pericarp is thin, the nucleus is small, and the average nuclear weight is 0.4 grams. The flesh is green and white, the flesh is fine and crisp, juicy, with clear flavor, sweet and sour flavor, excellent quality. The content of soluble solids is 35%-41%, and the edible rate is 97.2%. The growth potential is medium, the crown is medium size, the germination rate is high, and the branching ability is strong. Self-fruiting is strong, and it can bear normal fruit and high yield without pollination trees. The fruit setting rate is high and the ability of continuous fruiting is strong. Two crops a year, the first fruit accounts for about 70%, and the secondary fruit accounts for about 30%. The average yield of seedlings was 3.5 kg in the second year, 12.6 kg in the third year, and the highest yield was 20 kg in the full fruit stage. The first fruit blossoms in June, the second fruit blossoms in July, the primary fruit matures in mid-September, the secondary fruit ripens in mid-October at the latest, and the leaves fall from the end of October to the first ten days of November.

Youyou jujube can be planted in areas where the extremely low temperature in winter is not less than-17 ℃. It has strong adaptability to hilly and mountainous areas and gravel land, drought and cold resistance, barren resistance, strong resistance to early defoliation disease and low fruit cracking rate.

Key points of cultivation techniques

When planting in the north-south row, the mountain area should choose the sunny slope to avoid the wind and plant along the contour line, and the planting row distance should be 3 meters × 2 meters or 5 meters × 3 meters. After planting, the tree tray was watered thoroughly, covered with plastic film, and watered once after 7 days and 10 days. The tree shape is sparse layer or spindle shape. from 1 to 4 years after planting, winter shears are mainly light shears, and after entering the fruiting period, winter shears are combined with summer shears. In production, attention should be paid to pouring frozen water or popularizing the technology of grass mulching and film mulching to prevent striping. In the brittle ripe period of harvest, harvest with hand picking method, do not need to shake off jujube fruit or medicament to drive down jujube fruit.