A netizen on Nongcai.com Mangotong: After the mangoes are picked, how do I apply fertilizer?
Nongcai.com Mangotong technical team: Mango trees consume a lot of nutrients during the flowering and fruiting period, and the mango tree body has been in a state of decline after harvesting, which is not conducive to the new shoots after fruit harvesting and affects the flowering and fruiting of mangoes in the coming year. Mango post-harvest fertilization is the most important fertilization for mangoes throughout the year. The fertilization amount accounts for 60%-80% of the annual fertilization amount. The best time for fertilization is before and after pruning after harvest. In addition, in terms of fertilizer selection, reduce the amount of chemical fertilizers and use more organic fertilizers, especially fertilizers based on humic acid and alginic acid.
Mango post-harvest fertilization is called shoot fertilizer. The shoot fertilizer is mainly quick-acting fertilizer, because fruit trees will consume too much nutrient when blooming and fruiting. Quick-acting fertilizer is helpful for timely replenishment of nutrient deficiency of fruit trees, restore tree vigor as soon as possible, and germinate. New shoots. If the tree is weak, a compound fertilizer with high nitrogen (content) should be appropriately added. If the tree is very strong, use a balanced compound fertilizer. Because the nitrogen is too high, the shoot shoots will be very thick and affect the differentiation of flower buds in the coming year.
The amount of post-harvest fertilizer for shoots depends on the strength of the tree and the amount of fruit bearing. According to experts’ years of experience, if a tree yields 100 kg, the application of balanced compound fertilizer is 3-4 kg, which is higher or less than 100 kg. Increase or decrease the amount of fertilizer as appropriate. During the application process, it can be combined with organic fertilizers and middle and trace elements, especially calcium fertilizers, because mangoes require a lot of calcium.
After the shoot fertilizer is supplied, there is another fertilization, and this fertilization is called winter fertilizer. The main application of winter fertilizer is organic fertilizer to increase the organic matter content of the soil with the purpose of improving the quality of the fruits in the second year. Applying winter fertilizer, it is recommended to choose organic fertilizer, combined with high-potassium flushing fertilization, to protect fertilizer and loose soil, and improve quality. Water-soluble potassium fertilizer, because a lot of nutrients are consumed during flowering, supplementing potassium fertilizer can strengthen flowers, improve flower quality, and promote fruit setting.
Some growers will choose farmyard manure as winter fertilizer, but farmyard manure must be fully decomposed before applying it. One is to avoid infection of the crops by diseased eggs; the other is that the decomposed organic matter is more conducive to the activation of the soil aggregate structure. For mature and intact farmyard manure, it is recommended to use 20-30 kg for each fruit tree during the high-yield period.
A netizen from Nongcai.com Bananatong: What is the disease of bananas after ripening and rot, and how to prevent them (left)?
Nongcai.com Banana Communication Technical Team: Banana crown rot is usually one of the three major post-harvest diseases. Banana crown rot is a fungal plant disease, the damage is second only to anthracnose. It is characterized by browning of comb banana cuts and mold growth, causing banana fingers to fall off, shaft rot and fruit rot. Banana farmers often call it "white mold." There are more than a dozen pathogens of banana crown rot, which usually invade wounds; the cut wound is large, and the bacteria are easy to invade. Under high temperature, high humidity, and airtight packaging, banana fruits are seriously affected. Banana crown rot is controlled only by fungicides and cold storage methods, which are not effective, and comprehensive control is required. The first is to prevent damage. After combing, soak the wound with a cleaning agent to clean the milk. In addition, after soaking the preservative, it needs to be basically dried before being put into a fresh-keeping bag and sealed and packaged. If there is too much moisture, it is easy to grow mold. Finally, if possible, use low temperature storage and transportation.
Tobacco growers: Are there any requirements for harvesting tobacco leaves (picture on the right)?
Shaoguan Tobacco Technology Production Team: There are several principles for harvesting tobacco leaves: The first is to harvest the same part of the tobacco leaf every time, the same mature tobacco leaf. The lower leaves should be harvested early, the middle leaves should be mature and stable, and the upper leaves should be harvested when they are fully mature.
The second is to harvest 2-3 tobacco leaves each time, every 6-7 days. The upper leaves such as ****** are fully matured and 4-6 pieces are harvested at one time.
The third is that the harvest of tobacco leaves is usually carried out in the morning or in the morning. If it rains, wait until the rain stops before harvesting.
The fourth is that if there is a long period of rain during the picking period and the tobacco leaves turn green, stop harvesting and wait until the tobacco leaves show mature characteristics again. The last point is to resolutely refrain from harvesting immature tobacco leaves to make up the amount of flue-cured tobacco.
The tobacco leaves to be harvested and roasted must be fully mature.
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Cannulated screw is a common internal fixation device in orthopedic surgery.
Working process
During the operation, the Kirschner wire with the hole matching the hollow screw is first drilled into the bone of the fracture site, and then the hollow screw is screwed into the fracture site through the guidance of the Kirschner wire. Finally, the Kirschner wire is pulled out to complete the fixation of the fracture site. In many cases of fracture of the neck and femur, the healing cycle is long, and it usually takes about 30 months to remove the cannulated screws. At this point, the bone and the surface of the cannulated nail are closely connected and firmly connected in the nail path, which leads to defects easily generated by conventional nail removal methods, causing secondary injury at the fracture healing site and causing pain to the patient. Percutaneous cannulated screw internal fixation for femoral neck fractures has the advantages of small trauma, good healing, low rate of femoral head necrosis, and good stability.
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