供试植株为26年生,缺锰和锌的汤姆生脐橙(Thompson Navel)品种,用根外施肥方法,对供试植株喷施3—4升0.15%MnSO_4或0.15%ZnSO_4溶液。施用MnSO_4和 ZnSO_4溶液,设单一喷施或两者混合喷施;与0.5%尿素混合与否喷施处理。在植株盛花期喷施1次,待果实长至直径0.5～1厘米时再喷施1次。单一喷施 MnSO_4或 ZnSO_4溶液,缺素症得到部分纠正,两者混合喷施,缺素症得到完全 The test plants were 26-year-old, Thompson Navel varieties lacking manganese and zinc. The plants were sprayed with 3-4 liters of 0.15% MnSO 4 or 0.15% ZnSO 4 solution by using the method of external fertilization. The application of MnSO_4 and ZnSO_4 solution, set a single spray or a mixture of spraying; mixed with 0.5% urea spray treatment. Spraying plants in full bloom 1 time until the fruit grows to a diameter of 0.5 to 1 cm and then spray 1 time. A single spray of MnSO_4 or ZnSO_4 solution, part of the deficiency was partially corrected, the two spray mixture, complete lack of disease