Why the grapes become soft after ripening
In recent years, fruit growers have found that every time the grapes begin to change color, some of the fruit grains start to become soft, not full enough, and the color looks black and not fresh, and the yield and quality of the grapes are greatly affected. What is going on here? According to expert analysis, the original problem lies in the use of fertilizer. Some fruit growers usually like to use high-nitrogen and high-potassium fertilizers, but the amount of calcium fertilizers is insufficient. Grapes are fertile crops. During the growth process, they require both large amounts of elements such as nitrogen, phosphorus, and potassium, as well as medium and trace elements such as calcium, boron, magnesium, and zinc. During the entire growth period of grapes, although the demand for nitrogen and potassium The amount is large, but long-term excessive application will produce antagonistic effects among elements, especially excessive potassium, which will inhibit the absorption of calcium. In addition, the demand for boron and calcium during the grape flowering period increases. In addition to promoting the germination and growth of grape pollen tubes, promoting pollination and fertilization, increasing fruit setting rate, reducing seedless fruits and increasing yield, boron fertilizer can also increase sugar content. Quantity, improve the quality of the fruit. Calcium can improve fruit toughness, can resist sunburn more effectively, prolong the hanging time, reduce fruit cracking, and improve storage and transportation. At the same time, calcium is also a key element for sugar accumulation and improves fruit sweetness. It can be seen that calcium is an indispensable nutrient in the growth and development of grapes, especially when the grapes are enlarged to the color change period, the demand for calcium is the most. Poor storage resistance will greatly affect the quality of grapes. In this regard, it is recommended that fruit growers pay attention to the following points when using fertilizer: Appropriately reduce the amount of nitrogen and potassium. In order to avoid soil salinization, use low-nitrogen, low-potassium or medium-nitrogen and low-potassium fertilizers when topdressing, about 10 kg per mu. In addition to meeting the nutrient requirements of grapes, it can also be gradually used. The nitrogen and potassium content in the soil is restored to the appropriate range, and then fertilization is performed according to the normal amount. Increase the application of organic fertilizer. Taking advantage of the opportunity of applying base fertilizer in autumn, increase the amount of organic fertilizer, especially commercial organic fertilizer with high organic matter content, about 15 bags per mu, which can not only promote the formation of soil aggregate structure, but also make the soil loose and breathable, which is beneficial to the tree. The growth of fertilizers can also reduce the fixation of chemical nutrients in the soil and improve fertilizer utilization. Supplement the trace elements. When applying organic fertilizer in autumn, apply 500 grams of boron fertilizer and 80-100 kilograms of calcium fertilizer per mu. After the grapes have set fruit, add about 2 kg of calcium fertilizer in time; during the growth period, the boron fertilizer is mainly sprayed twice in a row before the grapes bloom and during the blooming period; the calcium fertilizer spraying is generally carried out in multiple times, and the first time is 1 week after flowering During the hard-core period, use it continuously for 2-3 times, with an interval of 7-10 days, and spray it again 10-15 days before grape harvest. You can choose calcium fertilizers such as chelated calcium or calcium lignin with high absorption and utilization. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone Blood Colletion tube,Infusion set,Disposable Syringe,Insulin Syringe,gause roll,Cotton roll,Sterile Urine cup,EDTA Tubes,Plain Tube FOSHAN PHARMA CO., LTD. , https://www.foshanpharma.com