How to manage red meat honey pomelo in spring?

How to manage red meat honey pomelo in spring? Please guide that spring is the early stage of red flesh honey pomelo hair root, periwinkle, flower spike, flowering and young fruit. this period, such as disease and insect damage, lack of fertilizer and drought, has a direct impact on the strong shoot, strong flower and fruit setting rate of pomelo trees, and is the key period to increase the yield of the same year. All kinds of spring tube technical measures must be taken in time in order to promote strong shoots and flowers, increase the rate of fruit setting and win a good harvest. Now with regard to spring management, the following suggestions are put forward for reference: first, apply spring shoot fertilizer in time. Timely application of spring shoot fertilizer is particularly important to improve honey pomelo spring shoot pomelo vomiting, strong shoot, strong flower and fruit setting rate. 1. The fruit yield of the first fruit plant was 100kg, and the application of ternary compound fertilizer was 2.5kg, or urea and potash fertilizer were applied twice, and this time the fertilizer was applied in "the Beginning of Spring"-"the Spring Equinox". Second, thinning flowers and shoots and picking hearts. Red flesh honey pomelo has a large number of flowers and fruit. Thinning flowers and shoots and proper coring can reduce the ineffective consumption of nutrients, improve effective flower quality, promote fruit setting rate, reduce tree load, promote fruit growth, and improve fruit quality and commercial value. 1. Thinning flowers and branches. Adult fruiting trees or declining trees have a large amount of flowers, so some weak flower branches should be removed. It is generally carried out from mid-late February to early March. In principle, we should master the principle of getting weak and staying strong, leave 4-5 flowers on the mother branch of one fruit, and implement the principle of reasonable matching of morning, middle and evening in the whole tree. After flower thinning, concentrate tree nutrients to meet the growth needs of remaining buds, promote large buds, good flower quality and high fruit setting rate after flowering. When thinning flowers, we should master that the weak trees are heavy and sparse, the first fruit trees are light or not, the fruit trees are heavy, the fruit trees grow tall, the flowers are unfavorable to sparse flowers, and the flowering period often encounters overcast and rainy weather, so we can take the method of shaking flowers to shake off some buds to reduce the maladies such as mildew and rot of buds caused by excessive density. 2. Thinning. Shoot thinning can improve the ventilation and light transmission of trees and reduce the harm of diseases and insect pests, which is an effective measure to improve the rate of fruit setting. Shoot thinning, generally thinning the top of the crown and the denser part of the periphery, the higher long branches are properly thinned, and the tender spring shoots in the crown and the short spring shoots on the outside of the crown are the mother branches in the coming year, which generally cannot be thinned. Spring shoot thinning can only be controlled within 5% of spring shoots, not too much. In order to increase the amount of leaves, produce more chlorophyll, improve the fruit setting rate, and achieve more fruits, high quality and high yield. 3. Pick the heart. Picking heart can improve fruit setting rate, accumulate tree nutrition, reduce ineffective nutrition consumption, hang more fruit, hang good fruit. Picking the heart is generally carried out at the top of the crown with long branches, and when the young shoot is 5-7 inches long, only 4-6 leaves are left. Third, protect flowers and fruits. Red flesh honey pomelo in spring is greatly affected by natural conditions, especially in flowering period, overcast and rain, high temperature and drought are harmful to flowering and fruit setting. Some effective technical measures must be taken to protect flowers and fruits and achieve high yield and high quality. The main results are as follows: 1. Cultivate strong spring shoots and fruiting mother branches. The main purpose is to cultivate robust spring shoots in one or two years and autumn shoots in two years. The tender spring shoots in the crown and the short shoots outside the crown are the mother branches in the coming year, with strong spring shoots, which create good conditions for the improvement of fruit setting rate in the coming year. 2. Spray trace elements. Timely and appropriate spraying of trace elements is an effective technique to achieve strong shoots, strong flowers and improve fruit setting rate. The purpose of protecting flowers and fruits can be achieved by spraying 0.2% borax or 0.1% boric acid + 0.2% phosphoric acid = potassium hydrogen + 0.3% urea 1-2 times before spring shoot blooming and early stage of Xiehua young fruit. 3. Proper amount of fertilizer, water and temperature in flowering and young fruit stage. Spring shoot extraction, flower buds, flower ears, flowering and pollination need appropriate amount of fertilizer, water and suitable temperature. If there is a lack of fertilizer and high temperature and drought for a long time in the bud and flowering stage, it will directly affect the strong flowers, more sterile flowers and low fruit setting rate. In the bud stage and flowering stage, there is a tap water orchard, the ground of pomelo trees spray water properly, can not spray on the trees, if the water is sprayed on the trees to increase the humidity of young leaves and grapefruit flowers, it will make the spring shoot young leaves, grapefruit flowers, the first fruit infected with diseases and insect pests, causing fruit drop. The water sprayed on the ground can replenish enough water during flowering so as to increase the fruit setting rate and reduce the occurrence of diseases. 4. Second ring cutting. Adverse climatic factors such as high temperature and drought, overcast, rain and low temperature often appear in the flowering stage and early stage of young fruit, which will adversely affect flowering and pollination and fruit setting, so effective technical measures must be taken to increase fruit setting. Secondary ring cutting is an effective measure to promote flower and fruit protection. For pomelo orchards with good fertilizer and water management, first-bearing trees and strong trees, in case of unfavorable weather such as overcast and rain, secondary ring cutting should be carried out to protect fruit; second ring cutting should not be used for fruiting trees and weak trees. Ring cutting method: ring cutting is carried out in the lower part of the branch, leaving a twig without ring cutting, and ring cutting is needed to achieve the purpose of protecting roots and trees, and achieving the purpose of protecting fruit and increasing production. The ring cutting must be carried out according to the tree potential of the flower quantity, and the ring cutting should be carried out when the flower quantity is more than 90%, and less when the flower quantity is 60%. The tree is weak and is not allowed to be cut around to prevent the pomelo from declining or dying. Fourth, get rid of insects and diseases and protect the top fruit. The control of pomelo diseases and insect pests is an important measure to ensure the yield increase of pomelo. Tender spring shoots, young buds and spikes are the most susceptible to diseases and insect pests. Rational fertilization and scientific management can promote the sturdiness of pomelo trees and make it difficult for diseases and insect pests to invade and infect. If effective management measures are not taken in the spring shoot period, the harvest will be reduced in the same year. February-March is the overwintering period of red spiders, so it is necessary to control them in time. Anthrax, greasy spot, ring streak and other diseases spread in the early stage, and it is not easy to see with the naked eye. if we do not pay attention to it, it will lead to the occurrence of diseases in the period of young fruit expansion, so the policy of "prevention first and comprehensive control" should be carried out. It is important to control diseases and insect pests in the early stage of spring shoot and young fruit. Chemical control: 1. The red spider was sprayed once before spring shoot germination in early February, Kemant added water 2000 times, or Nisolang added water 1000-1500 times in mid-March. 2. Various diseases. In late February, when the young shoot is about 0.5cm-5cm before flowering (do not spray during flowering), use copper-ammonium mixture: one jin of copper sulfate plus five jin of ammonium bicarbonate, pack with film for 24 hours, add 1000 jin of water to spray the whole tree and the ground. Or the spring shoot 0.5 cm-5 cm before flowering and the early stage of Xiehua young fruit were sprayed 1-2 times respectively, and mixed with 500 times of topzine plus water and 500 times of Jinggangmycin added water, or carbendazim and Jinggangmycin added 500 times of water, use alternately. 3. Other insects. Other insects use dichlorvos to add 1000 times of water. Timely prevention and control of spring shoot diseases and insect pests can promote strong spring shoots, luxuriant branches and leaves, less disease in the early stage of young fruit after Xiehua, and high fruit setting rate. Click to get more pomelo planting techniques click to get more fruit planting techniques