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一、长势:若长势弱、枝叶伸展缓慢、叶片趋黄色、淡黄色,这是缺氮缺铁的症状,则应喷氮肥为主,并适当喷些柠檬酸铁和磷、钾肥;若叶大嫩绿、枝条节间过长,则氮肥充足、应以磷、钾肥为主,并适当喷些微量元素。二、喷肥时间:在花前期、花期,壮果期的阴天,或晴天下午5时后进行。间隔期10—15天。三、肥料种类:碳铵、磷矿粉对叶面喷洒无效或有害,应禁止喷洒。
First, the growth: If growth is weak, branches and leaves slowly extended, the leaves tend to yellow, yellow, which is the symptoms of nitrogen deficiency and iron deficiency, you should spray nitrogen-based, and appropriate spray some citric acid iron and phosphorus, potassium; Verdant, branches internodes too long, adequate nitrogen, should be phosphorus, potassium-based, and appropriate spray some trace elements. Second, the time of fertilizer: pre-flowering, flowering, Zhuangguo cloudy, or sunny afternoon after 5 o’clock. Interval of 10-15 days. Third, the type of fertilizer: ammonium bicarbonate, phosphate rock spray on the leaves invalid or harmful, spraying should be banned.