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德安县八里园艺场有柑桔1500余亩,其中结果树405.7亩,1986年前柑桔产量一直徘徊在3万斤左右。大面积低产的根本原因是没有根据赣北的气候特点,在施肥管理上存在严重问题所致。过去柑桔冬肥在采果后的12月或1月施用,个别年份甚至拖至2月份才施下,这很不利柑桔树势的恢复。由于隆冬(12月～1月)气温低,肥料分解慢,树体已进入半休眠状态,根系的吸收功能差。同时,施肥时断根伤口不易愈合,不利安全越冬。并且到开春后,冬肥与春肥同时发挥作用,春、夏梢旺发,遂加剧了梢果矛盾,导致大量落花落果。
Durian County Park in gardening more than 1,500 acres of citrus, of which 405.7 acres of trees result, before 1986 citrus production has been hovering at 30,000 pounds. The root cause of large area and low yield is that there is no serious problem in fertilization management based on the climate characteristics of northern Jiangxi. In the past, citrus winter fertilizer was applied in December or January after fruit picking, and even in some years it was not applied until February, which greatly hindered the recovery of citrus tree vigor. As the winter (December to January) low temperature, slow decomposition of fertilizers, the tree has entered a semi-dormant state, the absorption of the root system is poor. At the same time, the root wounds are not easy to heal when fertilizing, unfavorable and safe to wintering. And to the spring, winter fertilizer and spring fertilizer play a role at the same time, spring and summer shoots, then exacerbated the contradiction between shoots, leading to a large number of flowers.