(1) Strains and seedlings
1. Strains: large oil-bodied strains and fine oil-bodied strains of Chazhigan.
2. Rootstock: red lemon, Jiangxi red orange, soft branch orange.
3. Seedling propagation: grafting technology is used to propagate seedlings.
(2) Site conditions
For irrigated paddy fields or slopes, the soil is required to be retention-type paddy soil and red soil, with an organic matter content of ≥ 2.0g/kg and a pH value of 5.0~7.0.
(3) Cultivation management
1. Planting time: Plant from the beginning of spring to the beginning of summer in spring, and plant from white dew to cold dew in autumn. For reclamation areas affected by salt tide, spring In dry years, it is best to plant before the rainy season in May-June.
2. Planting density: The planting density should not be too sparse or too dense. Generally, the number of plants planted per hectare should not exceed 1,200.
3. Garden construction: For newly constructed orchards, it is required that the previous crop cannot be citrus. Paddy field planting requires deep ditches, high borders and high mounds for planting, and an independent drainage and irrigation system is required. Each border is equipped with small ditches with a width of 0.6 to 1.2 meters, and the large and small ditches are connected. Slope planting requires low borders and low mounds for planting.
4. Soil management: After the shoots mature in summer and autumn, before new shoots sprout or after fruit picking, you need to cultivate 1-2 times. Lime needs to be applied 1-2 times a year; organic fertilizer is mainly used to improve soil fertilization. Heketu mainly improves the soil.
5. Fertilization: Apply organic fertilizer in the first month, May and September of the lunar calendar every year. The annual amount of pure chicken manure applied per hectare is not less than 1200 kilograms; for tangerine orange plants that produce 100 kilograms of fruit, Apply 0.8~1.0 kg of pure nitrogen annually.
6. Plastic pruning: The plastic pruning of tangerine peel adopts the natural happy tree shape. The main purpose of pruning is to maintain the ventilation and light transmission of the orchard. Generally speaking, the leaf-to-fruit ratio is not less than 60: 1