Lingbao jujube has been cultivated for more than 400 years, and is concentrated in the sandy soil of the Yellow River in Lingbao City. The fruit is large, mostly short cylindrical, with a single fruit weighing about 25 grams and a maximum of 33 grams. The peel is dark red, the meat is thick and small, the toughness is less, the taste is sweet, the meat is soft, the flavor is good, the fragrance is high, the sugar content is high, and it is suitable for making dried dates and jujube. Mr. Lu Xun once praised: "The red dates are excellent, and they are purchased by the South China Institute of Elementary Law." The famous translator Cao Jinghua also wrote a poem: "The monkeys probe between the branches, and the peaches have a fresh jujube."

Plant characteristics The fruit is large, oblate, with an average fruit weight of 22.3 grams and a maximum fruit weight of 34 grams. The shoulders are broad and slightly wider than the top of the fruit. The stalk is shallow and wide, and the ring is large and shallow. The top of the fruit is wide and flat, and the top is wide and medium. The handle is thin and short. The fruit surface is flat and the skin is medium thick, purplish red or deep red. The flesh is thick, green and white, dense in texture, hard, less juice, sweet and slightly acidic, containing soluble solids 32.4%, total sugar 23%, edible rate 96.7%~97.7%, dry rate 58%, dry Quality in the middle. Dried dates contain 70.2% of total sugar, and the skin is brittle and easily cracked. The meat is soft and not resistant to crushing and storage. The core is small and contains a kernel rate of about 70%. In Lingbao production area, it sprouts in mid-April, starts in late May, and harvests in mid-September. The fruit growth period is about 110 days. Cultivation habits The tree is tall, the crown is naturally round, the tree is strong, the hair is moderate, the density of the branches is moderate, the roots are weak and the growth is slow. The 80-year-old tree has a height of 10.5 meters and a crown diameter of 7.6 meters. The jujube is cylindrical and lasts for 7-8 years. The results were later, the results began 5 years after the rooting of the seedlings, and the grafted seedlings had a small number of results in the second year. After 15 years, they entered the fruiting period and the economic life span was about 80 years. In the 19-year-old tree, the average plant yield is 25.8 kg, and the highest plant yield is 34.8 kg. In the fruit-bearing period, the highest plant yields up to 150 kg. The fruit before harvest is serious and needs to be harvested at the right time. Adaptable, drought-tolerant, thin, frost-resistant, anti-jujube. The cracked fruit is lighter. Cultivation techniques Roots are weak, and grafting is used. The row spacing of the plant is preferably 7 to 6 meters × 4 to 3 meters. Topping, ring stripping, spraying plant hormones, etc. can be used to promote early results. Spray 50-70 mg/kg naphthylacetic acid before mining to prevent pre-harvest fruit drop.