Orange fruit is easy to show cracking fruit in the middle and late growth stages. What is the cause of the fruit cracking? The citrus fruit cracking fruit calcium deficiency is the most important factor, so what are the reasons for the citrus cracking? The cracking fruit has also become the focus of many agrochemical enterprises, and has launched a round of “anti-cracking warsâ€. After the war, more enterprises have returned without success, but instead they have “fake drugs and fake fertilizer dealersâ€. name. Through interviews, people have formed an understanding. When talking about cracking fruit, it is necessary to talk about calcium fertilizer. It is said that calcium fertilizer is also inseparable from cracking fruit. Many enterprises' anti-cracking schemes have always made a fuss about calcium supplementation, so there has been a public calcium supplement. The phenomenon of cracking fruit. Some farmers think that as long as they have used calcium, they can make the fruit not crack. As long as the calcium fertilizer is used to crack the fruit, it is considered that the calcium is a counterfeit product, which leads to many high-quality calcium fertilizers being affected. In fact, there are many reasons for the formation of cracked fruit. Moisture, fertilization, management, variety and other aspects, due to lack of calcium or imbalance caused by cracking fruit is only one of the reasons, comprehensive analysis of the reasons for cracking, it is particularly important to develop a comprehensive set of crack prevention measures. The survey found that the citrus cracking caused by the following six reasons: Reason one: the physiological characteristics of the variety cause cracking The cracked fruit is closely related to the physiological characteristics and genetic characteristics of the variety. The fruit size, peel thickness, fruit water content, cell tightness, fertilizer requirement, sugar content, acid content and fruit development quality all affect the fruit cracking. . For example, in the grape varieties, the varieties with thin peel and crispy flesh are easy to crack, and the varieties with fast water absorption and high water absorption during the coloring period are prone to cracking; the pomelo, the larger the fruit shape index, the thicker the fruit top, the center of the heart. The more enriched, the lighter the cracked fruit; the nectarine variety, the higher the sugar content, and the lower the acid content, the cracked fruit is heavier. Reason two: plant endogenous hormone imbalance caused by cracking Changes in the proportion of endogenous hormones in plants affect the rate at which the skin and flesh grow. When the growth rate of the two is unbalanced, cracks are formed. In actual production, in the middle and late stages of fruit development, the phenomenon of cracking caused by hormone imbalance is more common. At the same time, the abuse of hormonal plant growth regulators is one of the causes of cracking. The “explosion†of watermelon in Jiangyanyang in 2011 was related to planting species, climate (pre-growth drought, and late-stage rainfall), and was also closely related to the improper use of swelling agents. Reason three: Drastic changes in soil moisture cause cracking The change of soil moisture has a great influence on the absorption of calcium in the pericarp. Drought and flooding may cause water stress, reduce the absorption of calcium, and then cause cracking. In the early stage of crop growth, when drought occurs, during the rapid expansion of the fruit, frequent rainfall occurs. The water transported by the roots to the fruit increases rapidly, and the flesh cells will expand rapidly. At this time, the pericarp has been aging, and the pericarp cells are swollen due to the restriction of the stratum corneum. There will be a case where the flesh swells the peel. The cracking fruit appearing in this situation is more common in grapes, dates and pomegranates. If the water shortage in the early stage will affect the expansion of young fruit, in the case of continuous rainfall or flooding in the coloring period, a large number of cracking fruits will occur. Reason four: pests and diseases cause cracking Studies have shown that anthracnose can cause umbilical orange cracking, anthracnose, rust tick, red spider, etc. are directly related to fruit cracking, and attention should be paid to the prevention and control of pests and diseases. Powdery mildew is the result of skin hardening and loss of elasticity. After the hard core period, it is easy to split from the top of the fruit and form a cracked fruit. After the red spider is harmed to the grape, the fruit surface forms brown rust spots, and most of them form a cracked fruit from the fruit ridge. Reason 5: Nutritional imbalance causes cracking The mineral elements and nutrient balance in the flesh have a significant effect on the cracked fruit, and the nutrient imbalance in the tree will aggravate the fruit cracking. Phosphorus, potassium and calcium have the greatest influence on fruit cracking during fruit growth, followed by magnesium, boron, zinc, iron, copper and manganese. When one or several elements are excessive and the other elements are low, the cracking will increase. In actual production, in the later stage of crop growth, fruit cracking is very common due to calcium deficiency and potassium excess. At present, the problem of soil acidification is becoming more and more prominent, and the lack or imbalance of medium and trace elements caused by this phenomenon is very common, which aggravates the degree of cracking. Reason 6: Cultivation management measures cause cracking The fruit trees with weak tree, poor illumination, poor ventilation and partial application of nitrogen fertilizer have serious fruit cracking; fruit and vegetables with small load and leaf are easy to induce fruit cracking; soils with poor drainage, severe compaction, poor permeability and soil acidification have serious fruit cracking; The fruit orchard cracking fruit with poor pest control is more serious; the amount of cracked fruit in the orchard using a large amount of ethephon, gibberellin and 2-4D increased significantly. In summary, the reasons for the cracking are multi-faceted. The solution to the problem should also consider a variety of factors. It is often difficult to achieve a good result by unilaterally emphasizing a certain factor. It is necessary to summarize the more mature integrated anti-fracture management schemes, which involve the control of soil pH and comprehensive nutrient content, water management, pest control and the use of growth regulators to achieve anti-cracking purposes. More pesticide knowledge, please pay attention to China Pesticide Network Smart Bulb,Smart Led Bulb,Smart Light Bulbs,Wireless Light Bulb Guangdong Smart Street Lighting Co., Ltd , https://www.gdfldlight.com.jpg)