1. Seedling raising: Red orange, Fructus Aurantii, Fructus Aurantii or orange are used as rootstocks, and scions are collected from mother plants without quarantine diseases and insect pests for grafting seedling raising.

2. Planting: The planting time is from the end of February to the end of March in spring and from mid-September to mid-10 in autumn. The number of plants per hectare is ≤750.

3. Fertilizer and water: the annual application amount of organic fertilizer per hectare is ≥7500 kg.

4, shaping and pruning: through pruning, the tree body is ventilated and transparent.

5. Harvest: after1October15 days, harvest Fengzao navel orange when the soluble solid content is ≥ 10.3%; Fengyuan navel orange was harvested after 65438+ 10 in February, when the soluble solids were ≥ 10. 1%; When the content of soluble solids was ≥ 10.4%, Feng Wan navel orange was harvested after February 20th.

6. Environmental and safety requirements: The use of pesticides and fertilizers must comply with the relevant provisions of the state and must not pollute the environment. 1, sensory characteristics: the project index is round or short oval, neat; The peel color is orange yellow or orange red, and the fruit surface is bright and clean; Umbilical diameter ≤ 10mm, no obvious protrusion; The pulp is orange-yellow, crisp and tender, mainly sweet, and moderately sweet and sour. 2. Physical and chemical indicators: Project indicators: soluble solids (%) ≥10.3 ≥/kloc-0.1≥10.4 titratable acid (calculated as citric acid) (g//kloc-) 70 ~ 300 650Mm) ≤6.2 ≤6.2 ≤6.2 Solid acid ratio ≥11.5 ≥1.2 ≥1.93. Safety requirements: product safety indicators must meet the relevant national regulations on similar products.