Planting technique of sugar orange: how to apply fertilizer to sugar orange?

How to fertilize sugar oranges? Which nutrients are good for sugar tangerines? Please give guidance on the essential elements in the growth process of sugar orange: nitrogen, phosphorus, potassium, (a large number of elements), calcium, magnesium, sulfur (medium elements), zinc, manganese, iron, copper, boron, molybdenum, (trace elements). Each kind of nutrition has a certain function, the lack of any kind of nutrition will affect the growth of citrus; on the contrary, if some nutrients are too much, it will also have a toxic effect. On the other hand, all kinds of nutrition have their inherent proportion and interaction, if the proportion is out of proportion (especially trace elements), there will be adverse symptoms, affecting the yield or quality. These elements can be supplemented by the application of compound fertilizer and organic fertilizer. The fertilization of sugar orange fruit trees can be divided into spring shoot fertilizer, Xiehua small fruit fertilizer, autumn shoot fertilizer, flower bud fertilizer and pre-harvest (post-harvest) fertilizer. 1. Spring shoot fertilizer: about 20 days before spring shoot sprouting (usually February), mainly available nitrogen fertilizer. However, young trees and first fruit trees should "fertilize in the bud" according to the amount of flowers to determine the amount of fertilizer, in order to control the length of spring shoots and easy to protect fruit. Lime powder can be applied to neutralize the acidity of the soil and spray some foliar fertilizer. Such as spraying 0.15% borax, 0.3% magnesium sulfate, 0.3% potassium dihydrogen phosphate, 0.3% urea, nutritional nucleotides and so on. 2. Xiehua small fruit fertilizer: at the beginning of Xiehua, compound fertilizer plus urea is applied, more fruit is applied, less fruit is applied, which can significantly increase the fruit setting rate. The general plant yield is 25 kg, and it is suitable to apply 0.2-0.4 kg compound fertilizer per plant. But we should pay attention to control the germination of summer shoots. The nutrients of young fruits were supplied at the top of summer, and extra-root topdressing was used. 3. Autumn shoot fertilizer: the mother branch of the culture result is the focus of fertilization in a year, which should be 30% of the total amount of fertilizer applied in the whole year, mainly available nitrogen fertilizer, which can be combined with mature organic fertilizer and applied 10-20 days before shoot release. Fertilization should be combined with irrigation to make autumn shoots spit together. If you bury dried peanut bran or dried chicken dung, it is generally 40-60 days in advance in order to play a role in attacking autumn shoots. A small amount of autumn shoot fertilizer can also be used as strong shoot fertilizer after autumn shoot germination or turning green period. 4. Chemical fertilizer for flower bud differentiation: generally applied before flower bud differentiation in November, mainly buried soil miscellaneous fertilizer, organic fertilizer or compound fertilizer, the main function is to promote citrus flower bud differentiation. 5. Pre-harvest (post-harvest) fertilizer: old trees, weak trees, trees with many fruits, late-maturing species (banana oranges, etc.) can apply quick-acting fertilizer before or after harvest to promote early recovery of plant potential, reduce defoliation in winter, and facilitate flower bud differentiation. Young and strong trees can not apply this fertilizer. After fruit picking, the guest soil of the whole garden, especially the paddy field mandarin with shallow roots, is beneficial to protect the roots through the winter and increase the nutritional area and fertilizer content. Click to get more sugar orange planting techniques click to get more fruit planting techniques