1. Causes of fruit cracking
1. Calcium deficiency in fruits
The main cause of fruit cracking is calcium deficiency. The reasons are as follows: First, some fruit farmers only pay attention to the application of chemical fertilizers, ignoring the supplementation of organic fertilizers and trace element fertilizers; Second, although some fruit farmers will apply root or foliar calcium fertilizers, they often choose effective Low calcium content, slow-release calcium fertilizer, poor absorption effect, leading to calcium deficiency in the fruit; third, when the outside temperature is high, the new shoots of cherries in the greenhouse will grow, and most of the limited calcium in the tree will be used by the competitive new shoots. The consumption of long-term growth leads to insufficient calcium supplementation in the fruit and the phenomenon of fruit lack of calcium and cracking; fourth, the movement of calcium in the plant body mainly depends on the transpiration pull. When the humidity is high, the transpiration rate of the leaves is reduced, reducing the entry of transpiration fluid. The calcium in the fruit makes calcium deficiency aggravated.
2. Climate environment
After the cherry blossoms die in the greenhouse and before and after it matures, if there is a big temperature difference between day and night, rainy days, heavy rainfall, low temperature, etc., the moisture content inside the cherry will be increased, and the expansion force of the pulp will be greatly increased. When the expansion force of the pulp is obvious When the capacity of the peel is exceeded, it will cause the cherry fruit to crack.
3. Irrational watering
The soil moisture content in the greenhouse does not meet the growth and development requirements of cherry fruits, which is one of the important reasons for cherry fruit cracking. Some fruit farmers do not water or inadequate watering after the cherry blossoms die, but water a lot before and after ripening, which will limit the growth and development of the early peel. Once a lot of watering before and after maturity, the swelling pressure of the pulp will increase. Bursting the peel will inevitably cause fruit cracking.
2. Preventive measures
1. Apply fertilizer reasonably and increase organic fertilizer
When basal fertilizer is applied, bio-organic fertilizer or bacterial fertilizer should be used as the main fertilizer, and an appropriate amount of compound fertilizer and calcium fertilizer should be mixed. The big cherry base fertilizer can choose microbial agents and ecological grade fertilizers, which can not only meet the nutrient storage requirements of fruit trees, but also adjust the rhizosphere environment, improve the resistance to stress, and achieve the purpose of strengthening roots and trees. For top dressing, attention should be paid to the reasonable combination of nitrogen and potassium fertilizers, and special fertilizer for fruit trees can be used for germination fertilizer and expanding fruit fertilizer.
2. Foliar fertilization
Foliar fertilizer should be supplemented in time after the cherry leaves are unfolded and before harvesting. For foliar supplementation of calcium fertilizer, you can choose the easily absorbed Baibebang compound sugar alcohol calcium and Baibebang seaweed chelated trace elements, which can improve the calcium fertilizer and trace elements of cherries. Absorption, to increase the toughness of the peel and the intrinsic quality of the fruit, to prevent physiological problems such as fruit cracking.
3. Water reasonably
Big cherries are more sensitive to water, and are neither drought-resistant nor flood-resistant. They need to be watered reasonably according to their water requirements. Greenhouse cultivation is based on watering before germination, but also before and after flowering, hard-core period and swelling period, and after harvest. When watering, you should pay attention to small water and frequent watering, first-class watering. In addition, always pay attention to weather changes and do not water before or after rainy days.
4. Scientific management
After the cherry blossoms in the greenhouse, if there is a large temperature difference between day and night, rainy days, heavy rainfall, low temperature, insufficient sunlight, etc., the cherries can be artificially supplemented in the cloudy and rainy days, released lime blocks or installed dehumidifiers, etc. Tide and dampness. When the rain stops, the weather returns to clear, and the temperature of the shed rises suddenly, a shading net should be installed quickly to prevent the temperature in the shed from rising, and the fruit will absorb too much and too quickly to induce fruit cracking.
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