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柑桔挂果量大,挂果期长,以开花到采收,时间长达8～9个月,消耗养分多,果实成熟时,树体已处于饥饿、半饥饿状态,树势衰弱,如不及时补充养分,复壮树势,就会造成采前大量落果,采后大量落叶,既影响当年产量,又影响第二年正常开花结果。所以,要及时施好柑桔采前采后肥,以保证养分供应,保持树势壮旺,防止树势衰退,复壮植株,才能提高当年的产量,并为明年高产稳产奠定良好的基础。具体做法:在柑桔采收前15～20天施采前肥,在柑桔采收后5～10天内施采后肥,以速效速溶氮磷钾完全肥为主,5年生以上的植株,每次每株施氮磷钾复合肥1～1.5公斤,或施尿素、磷酸二氢钾各0.5～0.75公斤,雨后撒施或兑水淋施,并及时在树冠滴水线挖深、
Citrus fruit fruiting, fruiting long, with flowering to harvest, as long as 8 to 9 months, consume more nutrients, the fruit is mature, the tree has been in a state of starvation, half-starvation, frail weakness, if not in time Supplementary nutrients, rejuvenation tree vigor, it will lead to a large number of fruit before harvest, deciduous lot after harvest, not only affect the current production, but also affect the normal flowering the next year results. Therefore, it is necessary to timely apply pre-harvest postharvest citrus harvest to ensure nutrient supply, maintain vigorous growth and prevent the decline of trees and rejuvenate plants in order to increase the output of that year and lay a good foundation for a steady and high output next year. Specific practices: 15 to 20 days before the harvest citrus pre-harvest fertilizer, citrus harvest within 5 to 10 days after the fertilizer to quick-soluble total nitrogen, phosphorus and potassium-based fast-food, more than 5-year-old plants, Each time each plant NPK fertilizer 1 to 1.5 kg, or urea, potassium dihydrogen phosphate 0.5 to 0.75 kg, after the rain sprinkle or water cast, and in time to dig deep in the crown drip line,