Grapefruit is generally fertilized in the soil. The saplings can be selected from the ring and disc-shaped fertilization methods. The adult trees can choose the fertilization method such as strip ditch, radiation ditch, acupoint application, and whole garden application, while the root dressing can be used for foliar spray fertilizer. Fertilization time of young trees: saplings planted for 1-3 years, can be used to apply fertilizer in March-August, and fertilized compost, compost, and dried cake in October. Adult tree fertilization time: Adult trees can be used to apply fertilizer before germination. 1. Grapefruit fertilization method 1. Soil fertilization The saplings can be fertilized in a ring shape and a disk shape, and the adult trees can be fertilized by using a ditch, a radiation ditch, a hole application, and a whole garden application. 2, root dressing (1) In addition to soil fertilization, grapefruit can also be used for foliar spray fertilizer. Foliar topdressing is to absorb nutrients through the pores. This method uses less fertilizer and has better effect, but it is not a substitute for soil fertilization. It is advisable to spray the tip color and the young fruit stage, and focus on the leaf back. (2) In the summer when the temperature is high, the top dressing can be carried out on a sunny day. Generally, it can be sprayed at 10-24 °C before 10:00 am and after 4:00 pm after the dew is dry. (3) The concentration of various fertilizers is 0.2%-0.5% of urea, 5% of clear urine, 0.2% of zinc oxide, 0.1%-0.2% of boron, 0.2% of ammonium molybdate, 0.1%-0.2% of ferric citrate, magnesium nitrate 0.5%, potassium nitrate 0.3%-0.5%, potassium sulfate 0.1%-0.3%+0.2% slaked lime, potassium dihydrogen phosphate 0.2%-0.4%, calcium perphosphate leaching solution 1%, zinc sulfate 0.1%-0.2%+0.1 slaked lime , magnesium sulfate 0.2% - 0.4% + 0.2% slaked lime, manganese sulfate 0.1% + 0.1% slaked lime. Second, young tree fertilization time 1. The saplings after 1-3 years of planting are mainly for cultivating strong root groups, promoting new shoots, forming crowns as soon as possible, and entering the fruiting stage ahead of time. Nitrogen, phosphate and potash fertilizers can be applied during the period. Less and weaker, shallower distribution, and weaker absorption capacity, so a small amount of fertilization is required. 2, can choose to apply quick-acting fertilizer every 15-20 days in March-August, which is conducive to promoting the growth of three new shoots in spring, summer and autumn, which can be applied about 20 days before each shot. - 2 times to promote the shoot fertilizer, when the shoots begin to turn green after the shoots, and then apply 1 fertilizer, which is conducive to promoting the new shoots. 3, generally after mid-September, it is not appropriate to apply quick-acting nitrogen fertilizer to avoid late autumn shoots. In October, you can apply 1 base fertilizer, mainly can be used to fertilize manure, compost, dried cake, etc. 25-30kg of decomposed pig cattle, or 1-1.5kg of cake fertilizer, is conducive to enhancing tree potential and improving plant resistance. Third, adult tree fertilization time 1. The result of the adult tree is mainly spring shoots. It can choose to apply quick-acting fertilizer before germination, which is beneficial to promote the growth of spring shoots, promote the growth of old leaves and delay the leaves, increase the nitrogen content of leaves, and make the flower development complete. The formation of leafy fruit branches can be strong and strong, and can be fertilized 20-30 days before germination. 2. The annual tree is used to trim excess flowers and increase the amount of vegetative shoots. Generally, spring fertilizer can be delayed until the summer flowering period. During the period, the amount of nitrogen fertilizer can be increased appropriately. The small-year tree can be applied to the early spring in advance. Too much is beneficial to control the excessive extraction of vegetative shoots and increase the fruit set rate. Fertilizer can apply nitrogen, potassium and phosphate fertilizers, and the amount of fertilizer application accounts for about 20% of the total fertilization amount in the whole year. (get rich) Warm reminder: Yuego Agricultural Resources Network will continue to set up a cluster of crop planting technology support. Later, according to the actual situation, it may be possible to set up a group of agricultural resources to buy the group and recommend the high quality and low price to everyone. Please contact us at 19137628136 (with WeChat) This article URL: grapefruit fertilization method and time Interlock Pvc Coated Gloves,Standard Duty Pvc Gloves,Pvc Cotton Liner Gloves,Slip Resistant Gloves JINAN SHANDE SECURITY TECHNOLOGY CO., LTD , https://www.sdsxlb.com