Key points of whitening technique of winter jujube

When the fruit of winter jujube enters the white ripening stage, it needs to be managed emphatically, which is related to the quality and maturity of jujube in the later stage. Today we will have a brief understanding of the main points of winter jujube whitening technology.

Key points of whitening technique of winter jujube

The main results are as follows: 1. when the winter jujube is white, the chlorophyll in the pericarp decreases, the background color fades and whitens, and the fruit enters the stage of rapid accumulation of sugar and dry matter, which is dominated by potassium fertilizer to avoid the intake of nitrogen fertilizer and prevent the fruit from ripening late.

2. To control watering, weak trees can be watered properly, but strong trees or general trees should not be watered as far as possible to avoid excessive watering leading to delay of maturity.

3. During the whitening period of winter jujube, the nail mouth which is delayed to heal should be treated in time. Cytokinin and gibberellic acid can be smeared on the nail mouth, and then fastened to it with plastic film. The healed nail mouth decides whether to open the nail twice according to the tree potential. In general, strong trees can open armour twice, and the width is determined according to the tree potential, not too wide. The method of multiple ring cutting can be used.

4. when the winter jujube changes color, foliar fertilization can also be carried out to increase the deposition of fruit components. Promote color change.

5. The winter jujube trees planted in the greenhouse should pay attention to the cooling in the greenhouse and can be shaded or sprinkled with mud at noon.

6. Jujube trees are easy to be eroded by diseases and insect pests in high temperature and hot weather. The main diseases are fruit cracking, anthracnose and fruit shrinkage. Pyrazole carbendazim, prochloraz, methyl thiophanate, tebuconazole and propionate zinc can be used; pests are mainly red spiders, jujube tick lice, etc., and methamectin, avermectin, pyrethroids, and spiromites can be used.

In a word, when planting winter jujube, we should pay attention to the scientific planting management, and control the water and fertilizer, opening armour and so on in the whitening period.