Dongzao seedlings are good varieties of jujubes that have been grown and evolved for many years. They have large fruits, high sugar content, high storage stability and high economic benefits. Winter jujube seedlings are warm, slightly cold-resistant, like fertile, well-drained soil, alkaline soil, sticky weight, sand can be planted. Below we understand the cultivation and management methods of winter jujube seedlings, and hope that the majority of growers will learn from them.
1, winter jujube seed orchard selection. Choose the standard rectangular shape of the field, the sunshine is abundant, the terrain is wide, the water source is sufficient, the irrigation and drainage is convenient, the water ditches and the roads are well-equipped, and it is suitable for the construction of winter jujube orchard construction.
2. Do a good job of planning. For the selected gardens, we must conscientiously carry out the planning of the variety, division, road, irrigation and drainage system, fertilizer base, shelter forest and auxiliary buildings to facilitate the standardized management of the orchard.
3, winter jujube seedling planting method. It is necessary to select seedlings with full buds, thick branches, and complete and developed roots. After the seedlings are selected, the roots are immersed for 24 hours before planting, then immersed in 0.3% copper sulfate for 1 hour or sprayed with 3 waves of sulphur sulfur sulphide. The planting period is best at the end of March and early April after the spring temperature rises. When planting, plant seedlings are planted in the planned plots, and the seedlings should keep the roots stretched. After planting, watering, filming and drying will be carried out, and the dry height is 40 cm to 50 cm.
4. Fertilizer management. The first year of jujube seedlings sprouted from the tip, and 5 grams of urea was chased every other week. Phosphorus and potassium fertilizers were added at the beginning of August. After the spring germination, the fertilization is carried out in the spring. The organic fertilizer is mainly used. The bean cake and the vegetable cake are crushed and put into a sealed altar for fermentation. The decomposed upper liquid is taken and the water is fertilized 10 times, usually 7 to 10 days. Once fat. Before and after the flowering period, 0.2% urea solution can be applied to the pot to supplement the loss of nitrogen during flowering. Spraying 0.3% urea solution three times in the spring foliage, and spraying the winter jujube after fruit setting 2~3 times 0.3% potassium dihydrogen phosphate in the fruit expansion period
5, winter jujube seedlings: it is to cut off the top of the jujube buds. Generally, the young part is removed about 10 cm, below the topping part, and 4 to 6 secondary branches are retained. The center branch of the young tree and the main and side branches are topped, which can promote the germination of new branches; the light picking of the jujube on the weak branches, the horizontal branches and the secondary branches can promote the growth and enrichment; the jujube with strong branches, extended branches and renewed branches Head topping, can concentrate nutrients, promote secondary branch development, increase the number of jujubes, and increase the fruit set rate.
6, plastic trimming. The common tree shape of winter jujube has two main branches and three cups. Regardless of the tree shape, the seedlings can be dried at 20 cm on the basin. Depending on the tree shape, 2 to 3 main branches can be left. When the main branches grow to 20 cm, the tops of the branches are removed to promote small germination. Branching, branching up to 20 cm, then picking the heart, repeatedly picking the heart until the fall, the next year can bloom. In winter, the main branches of the selected ones are short at 25 to 30 cm, and the thick branches on the main branches can be cut to 1/3 to 1/2 of their length as fruit branches. If you want to cultivate a large bonsai. Pay attention to the cultivation of the main branch extension branch.