Causes of fruit cracking of winter jujube and its control measures

In the process of jujube planting, farmers often encounter the phenomenon of fruit cracking of winter jujube, which seriously affects the quality and yield of winter jujube, and brings serious economic losses to farmers. So what is the reason for the cracking of winter jujube? How to prevent and cure it? Let's get to know it.

1. Causes of fruit cracking of winter jujube

1. Water imbalance

In the early stage of growth, the soil is too dry, and the continuous rainy days or rainstorms from the color conversion period to the mature period will cause sufficient water supply of the root system in a short time, resulting in rapid expansion of the pulp and slow growth of the pericarp, resulting in fruit cracking.

2. Nutritional imbalance

Some farmers apply a large amount of urea or ammonium nitrogen fertilizer in cultivation, which makes the early-maturing vegetative growth too exuberant, resulting in the imbalance of tree business and fruit cracking. In addition, ignoring the application of trace elements, the tree is malnourished due to physiological deficiency, and it will also cause fruit cracking.

3. Sunburn

The leaf area of jujube is small, and the sunny fruit is very easy to cause direct sunlight. After being exposed to strong light, the pericarp will form small sunburn marks on the surface, resulting in a decrease in the toughness of the epidermis, which will crack after rain and then spread to other parts.

4. Improper fertilization

The fertilization of fruit growers is mostly spread on the ground or close to shallow fertilization, while the precocious root system is mainly concentrated in the soil layer of about 20 cm, which is a root layer with rapid and violent changes in soil moisture. With watering and rain, the roots will absorb a lot. It caused drastic changes of water in the intercellular space of the fruit, resulting in fruit cracking.

II. Prevention and control measures

1. It is necessary to increase the application of organic fertilizer and biological bacterial fertilizer, improve the soil, improve soil fertility, provide adequate water supply and reduce fruit cracking.

2. Reasonable pruning and improving permeability are beneficial to the rapid drying of jujube fruit surface and reducing fruit cracking after rainfall.

3. Attention should be paid to timely drainage in the rainy season and timely irrigation in case of drought. It is suggested that the surface of jujube fruit should be dried quickly after rainfall to reduce fruit cracking. During the fruit expansion period, the soil should be kept in order to prevent the soil from being too dry or too wet.

4. To enhance fertilization, it is better to dig a circular ditch at the outer edge of the crown projection to fertilize. The fertilization site is better where the capillary root of the root is concentrated, and the depth of the ditch is 30-40 cm, which is beneficial to the root system rooting, and the root system relieving ability is also strengthened in case of drastic changes in fertilizer and water. Therefore, the normal growth of fruit trees will not be affected, and the soil will be covered after fertilization.

The above is the introduction of the causes and control measures of winter jujube cracking. I hope it can help you. If you want to know more about it, please pay attention to us.