First, the main types of cracking Most of the apricot splits are strip-like, extending radially to the ankles and fruit shoulders with the fruit top as the center, such as the small full yellow. Some of them first cracked from the suture line, and soon reached the core of the fruit, showing a "open mouth" shape, such as the big apricot apricot. There is also a mixed cracking type, what kind of cracks may appear on the fruit surface, such as Dafeng apricot and Erguo apricot. Second, the cause of cracking 1. Related to the variety. Large and medium-sized fruit than small fruit, flat round fruit than round fruit, early ripe fruit than the late ripe fruit easily cracked. In addition, the varieties that are exposed to rain during ripening, have thin peel, soft texture, and poor adaptability to the external environment are vulnerable to cracking. 2. It is related to the soil. The viscidity of soil texture is more severe than that of sandy soil orchards. This is due to the drastic changes in dry and wet clay soil. 3. It is related to fruit growth. Most of the apricots begin fruit cracking in the second quickest period of the fruit. In particular, the fruit coloring period occurs most severely at the coloring sites, because the fruit soluble sugars are transformed and accumulate in a large amount, and the pressure resistance decreases. If a long drought suddenly occurs, the fruit will pass through. The root or pericarp absorbs a lot of water and produces abnormal turgor pressure, which exceeds the maximum tension that can be sustained by the cell wall of the pericarp and flesh tissue and causes fruit cracking. 4. Related to moisture. Fruit ripening period with continuous rain, long drought and heavy rain or flood irrigation can easily cause fruit cracking, and cracking occurs severely in years when there is much rain. 5. Other factors. Sunburn or fruit surface after the formation of dry spots caused by mechanical damage, young fruit infestation or pesticide spray on the fruit surface, etc. are easy to cause cracking. Third, prevent apricot cracking measures 1. Breeding resistant varieties. Special anti-cracking varieties such as rhubarb, two red, and string red apricot should be selected for special early or late ripening, good elasticity of the flesh, and low plasticity. 2. Tree tray cover grass, improve soil, increase organic fertilizer. Covering the grass not only maintains the soil moisture, but also prevents the rapid change of soil moisture due to rainfall, slows down the rate of root absorption, and ensures the coordinated action of fruit metabolism. The improvement of soil and the application of organic fertilizer can increase soil permeability and water retention, and make the soil water supply uniform. So as to reduce cracking. 3. Ditch the drainage and timely irrigation. Apricot trees are not tolerant, so the water is discharged in a timely manner in the rainy season, otherwise it will not only cause cracks but also cause root rot. Irrigation should be done promptly when drought occurs. Drip irrigation or sprinkler irrigation is the best. Especially in the apricot fruit expansion period and the coloring period, the soil should be kept moderately moist to prevent fruit cracking caused by excessive dryness or excessive humidity. 4. Spray chemicals or growth regulators. The spraying of 20010-6 rare earth or 2510-6 naphthalene acetic acid or 0.3% calcium chloride during fruit enlargement and coloring can prevent or reduce cracking. Hair Wash Shampoo,Natural Shampoo,Hair Nourishing Shampoo,Ginger Hair Shampoo Wuxi Keni Daily Cosmetics Co.,Ltd , https://www.kenicosmetics.com
Causes of apricot cracking and prevention measures