Citrus mainly applied nitrogen and phosphate fertilizers during spring shoots, combined with external application of 2 urea+3 potassium dihydrogen phosphate leaves for top dressing; for citrus plants without basal fertilizer in winter, a basal fertilizer was applied at the drip line of tree trays. , Each plant 50 kg of livestock manure, 0.2 kg of urea, 0.3 kg of phosphorus fertilizer or ternary compound fertilizer, mainly in strip or ditch. The amount of fertilizer should be applied according to tree vigor, weak trees should be applied more, and Wangshu should be used less or not. At the same time, in the flowering, fruiting period, fruit expansion period, spraying strong fruit Tiling liquid to increase the coarse fruit pedicle, improve nutrient delivery, prevent falling, fruit drop, cracked fruit, stale fruit, malformed fruit, make the fruit color beautiful, fruit shape Good, good taste. Buds exposed white and two-thirds of the flowers are sprayed with boron outside the roots, and 3 borax borax fertilizer can be used for foliar spraying to ensure flower quality and increase fruit setting rate. 1 ml sterile hypodermic syringe,2ml syringe,dispensing syringe,auto disable safety syringe Shandong Zhushi Pharmaceutical Group Co.,LTD , https://www.sdzs-medical.com