In recent years, Panxi Town, Huaning County, Yunnan Province, has cultivated special early-maturing oranges, and formulated the following citrus production measures for the physiological characteristics and phenological characteristics of special early-ripening oranges. First, fertilization: "three promotion", "three strong" "Three promotion" means promoting spring shoots, promoting summer shoots, and promoting autumn shoots. 1. Promoting spring shoots: Before February 20th, apply urea, 2, promote summer shoots: May 20, apply urea, 3, promote autumn shoots: July 20, apply urea, sapling management to nitrogen-based, Phosphorus is supplemented with potassium supplement. Annual: Each time the shoot fertilizer is applied to 0.1 kg urea per plant, according to the conditions of the shoots, when the leaves are fully spread, the shoot fertilizer is applied, and 0.05 kg of urea is applied per plant. In the second year of life, each time the shoot fertilizer is applied, 0.15 kg of urea per plant is applied. When the leaves are fully spread, the shoot fertilizer is applied. Each urea application does not exceed 0.05 kg (but it is not applied, but generally it is not applied except for weak branch shoots). Three-year-old: Tip fertilizer 0.15 kg of urea per plant. When promoting summer shoots, each plant has 0.2 kg of calcium sulfate, and when the autumn shoot is applied, potassium fertilizer is applied and the shoot fertilizer (three-year-old) is not applied. Second, fertilization method (refers to spring, summer, autumn fertilizer) Annual: 30cm from the trunk to dig an annular groove 10cm in depth and 10cm in width. The fertilizer is sprinkled into the ditch, covered with soil, and filled with water (ie, digging trenches, fertilizing, covering soil, and irrigation). Two-year-old: Oral type fertilization, 40cm from the trunk, 10cm deep and wide. Three-year-old: Groove, 50cm from the trunk, 10cm deep and wide, transposition. Winter Fertilizer: Annual: Fertilize 40 cm from the trunk, deep 40 cm, 15 cm wide and 1 m long. Two-year-old: Fertilizes from the trunk of 60cm long, 40cm deep, 15cm wide and 1m long. Three-year students: The middle ditch, deep 40cm, width 15cm, length 1m. Application of winter fertilizer: autumn shoot ageing (applied at full maturity), November-December, winter fertilizer is absolutely not applied urea, mainly farmyard manure, no less than 10 kilograms per plant per year, phosphate fertilizer not less than 0.3 kilograms Above 0.5 kg. Third, pest and disease control: 1, Starscream prevention and control (1) The same pesticide is not used twice in one year; (2) The same kind of pesticide is forbidden to use continuously; (3) Spraying quality: to reach the front and back of the leaf, the trunk must be sprayed wet; (4) Must Two consecutive times, separated by 7 days; (5), clearing the park in winter is very important. (6) Picking and treatment: First, the central insecticide is used for prevention and treatment; the above is the prevention and treatment of the winter garden (7), medication: flowering, young fruit period: 2000 times available for killing alfalfa or 1000 times for alizarin and 1000 times for alkaloid . Flowering, young fruit period banned Kete special, sword effect, correction of phlegm, annihilation (after the use of drug tissue in the young spot) that can not be used before June 20. 2, latent leaves Oh: The main harm to the young branch shoots, does not harm the spring shoots, endanger the summer and autumn shoots, in the hair-driving period to self-cut when the harm, (1) should be used before the release of drugs, when pumping to 2 mm (meters The size of the spray, (2) must be continuous medication, every 7-10 days to fight a drug. 3, aphids: imidacloprid 1000 times. 4, yellow tip disease: characteristics: yellow tip (summer and summer shoot). (1) Use virus-free seedlings to control hibiscus; (2) Excavate diseased trees; (3) Excavate fruit trees without economical cultivation value.
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