After the results of winter jujube seedlings, they will enter the color-changing period to maturity. The technical management at this stage is very important and will directly affect the quality and yield of jujube fruit. The main management measures during this period include: improving the smoothness of fruit, cultivating loose soil, removing weeds, stalks, management of fertilizer and water, prevention and control of pests and diseases, and prevention of natural disasters.


First, improve the smoothness of the fruit surface

      With the gradual improvement of winter jujube seedling management technology, the quality of winter jujube fruit surface has become one of the important indicators to measure the commerciality of jujube fruit, especially during the period when the winter jujube changes color to maturity, it is very important to improve the fruit surface smoothness. .

The smoothness of the fruit surface is mainly affected by light, temperature and moisture. At the same time, when the spraying is uneven and the concentration of the liquid is too large, the smoothness of the fruit surface will be affected. The chelated titanium fertilizer can be used to improve the stress resistance of the jujube fruit and reduce the effect on the fruit surface. The effect of this, thereby improving the smoothness of the fruit.

Second, timely cultivating loose soil, weeds, stalks

     In the main producing areas of winter jujubes in northern China, the rainfall from the color change period to the mature harvesting stage is scarce, and the jujube soil is in a state of deficiency in most years. Especially after the rain in late summer and early autumn, the soil compaction is serious. Not only the soil moisture and mineral nutrients are difficult to meet the requirements of rapid growth and development of winter jujube, but the soil ventilation condition is particularly poor. Therefore, timely cultivating loose soil in jujube garden, removing weeds, maintaining good aeration of jujube soil and enhancing the ability of roots to absorb water and mineral elements is one of the effective ways to improve the yield and quality of winter jujube. At the same time, in the color change to maturity, some jujube trees have too many results, and the jujube fruit has been basically inflated. The branching can prevent the jujube tree from being overloaded and crushing the branches, which is the key to ensuring the normal growth of jujube fruits and ensuring high yield.

Third, strengthen fertilizer management

      During the period from the color change period to the mature harvest of winter jujube, although the demand for nutrient elements and water is not as large as that of the previous period, it is necessary to ensure sufficient water in this critical period, and timely supplement the nitrogen required for the normal growth of jujube fruit. Phosphorus, potassium, iron, boron, calcium, zinc and other nutrients should pay special attention to the supplement of potassium fertilizer, which is the key to promoting the second expansion of jujube fruit, improving the quality of jujube fruit and ensuring high yield. Fertilization mainly has two methods: base application and foliar application. The application of high-potassium fertilizer is mainly applied to promote the expansion of jujube trees, and the foliar application of chelated titanium fertilizer is sweet and beautiful, and potassium dihydrogen phosphate is used to promote jujube fruit. Increase sugar and change color.

Fourth, scientific prevention and control of pests and diseases

      In this critical period, the prevention and control of pests and diseases should be strengthened, such as red spiders, heartworms, blind mites, shrinking fruit diseases, anthracnose diseases, brown spot diseases and other pests and diseases. If the prevention and treatment are not timely, it will cause serious deciduous and fruit drop of jujube trees and affect jujube. The yield and quality of the tree.

Commonly used agents are pyrethroids, imidacloprid, chlorpyrifos, acetamiprid, avermectin, carbendazim, carbendazim, mancozeb, thiophanate-methyl, prochloraz, difenoconazole, Bromobacillus, agricultural streptomycin, and the like.

Fifth, pay attention to prevent the harm of natural disasters to jujube

     During the period of color change from winter jujube seedlings to harvesting, severe weather is prone to occur. Attention should be paid to weather changes. When encountering natural disasters such as high winds, heavy rains, hail, etc., preventive measures should be taken in time to minimize natural disasters. The damage caused by the tree ensures the normal growth of the jujube fruit.