The latest course of high-yield planting techniques of green jujube

Green jujube is an excellent tropical and subtropical rare fruit, the fruit is rich in nutrition, crisp, sweet and delicious, containing a lot of vitamin C, calcium, phosphorus, vitamin B, carotene and so on. It is said that "solar eclipse three dates, immortality". Because of its beautiful fruit shape and the flavor of apples, pears and dates, it also enjoys the reputation of "tropical little apples". Let's take a look at the high-yield planting techniques of green jujube.

Growth characteristics of Ziziphus jujuba

Green jujube shows the habit of continuous growth throughout the year, as long as the temperature is suitable, the terminal bud will grow forward, and then sprout lateral branches. Every 3 nodes of the branch, the rib-like alternate branching technique is also a subordinate branch every 3 nodes, and finally forms a trunk at the branch level. The primary branch (main branch), secondary branch, third-fourth branch (main fruiting branch) can grow to 2 meters, average 16 secondary branches, secondary branches can be 12 meters long, and the average axis produces 8 tertiary branches: the length of the third branch is 60 cm. It can grow multiple fourth-order branches.

Fruit characteristics of Ziziphus jujuba

Green jujube flower bud differentiation in the current season (year), rapid differentiation, large number of flowers, flowers and fruits on the same branch, flowers bloom during the day, bloom at the beginning of 6 ~ 8 am, bloom from 8 to 11:00, and rarely open after 12:00: they are pollinated by insect-pollinated flowers, flies, bees and other insects. It can blossom in 70 days in the first year, and can blossom and bear fruit many times a year. It takes about 120 days from flowering to fruit ripening, and blossoms continuously with the main length of the shoot from April to December, but the fruit setting ability of flowers in different periods is different. From April to June, the fruit setting rate of flowers without fruit setting from July to August is low, and the fruit setting rate of flowers from September to October is high, and a large number of fruits mature in January ~ February. From a tree point of view, the main result is that the tertiary extension accounts for 90% of the total fruit, the secondary branch accounts for 9.5%, and the primary branch (main branch) accounts for only 0.5%.

Planting conditions of green jujube

The main results are as follows: 1. Soil: green jujube is not strict on soil, but it is more suitable for soil with micro-alkali (PH value 7.5) to acid PH value above 6.0.It requires sandy loam soil, and it is convenient for drainage and irrigation in deep soil layer.

2. Temperature, green jujube is a positive plant and needs plenty of sunlight. The average annual temperature in the planting area is more than 18 ℃ (Yuanjiang 23.8 ℃), and the extreme minimum temperature is not less than 0 ℃. During the fruit expansion period, the temperature difference between day and night is large, which contributes to sugar accumulation and is suitable for planting below 1200 meters above sea level.

3. Moisture: green jujube has developed root system and strong drought resistance, and can grow normally in areas with annual rainfall of 500 mm and relative humidity greater than 50%. Florescence requires a higher humidity, relative humidity at 85% is conducive to pollination, fertilized fruit ripening period requires less rain and more sunny weather, otherwise it is easy to cause a large number of flowers and rotten fruit.

Planting preparation of green jujube

1. Digging ponds for fertilization: tree ponds are required to be 1 meter long and 1 meter wide, 0.5 meters deep, 4 × 7 meters to dig a pond, one plant per pond, and 33 trees per mu. After the pond is dug, 30 kilograms of mature farm manure and 0.5 kilograms of calcium magnesium superphosphate or calcium magnesium superphosphate fertilizer will be applied to each pond. Fertilizer should be applied in 2-3 layers, and each layer of fertilizer should be backfilled with a layer of soil. When returning to the soil, all the soil dug out above should be returned to the hole and piled into a mound with a height of 20 centimeters and a diameter of 1 meter.

2. Variety selection: green jujube must be planted with excellent varieties, which have four conditions: large fruit, fine crisp meat, high sweetness, no astringency and slightly sour taste. The peel is smooth and bright, yellowish green, good taste, no skin after eating. The seeds are small and the meat is thick, and the soluble solids are high. Strong resistance, especially resistance to diseases and insect pests. Moreover, Ziziphus jujuba is a cross-pollinated plant, so it must be equipped with pollination varieties. Any two varieties can be pollinated with each other, which is generally 6-8-1.

3. Planting period: green jujube can be planted in spring, summer and autumn except winter. It can be planted in March-May in spring, June-July in summer, September-October in autumn, and planting in March-April is more suitable for the same year.