1. Irrigation: According to the weather conditions and seedling performance, irrigation should be carried out in time in sunny days, high temperatures and other weather when seedling leaves wilt.

2. Weeding: ① Keep the basin clean and free of weeds, ensure the ventilation of roots and avoid the breeding of pests and diseases; ② Short and benign weeds are stored in rows in orchards, or clover, hemlock, perilla and Pogostemon are planted artificially to provide habitats for natural enemies.

3. Open pocket: For plants that are planted too deeply and buried too deeply, dig open pockets.

4. Intercropping between rows: only short-term cash crops, leguminous crops, grasses, etc. Can be planted between rows of orchards, not tall crops, vines and wheat. It is not suitable to plant solanaceae vegetable crops; The distance between intercropping crops and plants should be greater than 1 m.

Second, fertilization.

1. Fertilization principle: ① Nitrogen fertilizer is the main fertilizer, with phosphorus and potassium fertilizer; ② The application of organic fertilizer must be decomposed before use; (3) Eat less and eat more, and give less; ④ Avoid using garbage from hospitals and factories and chlorine-containing fertilizers.

2. Fertilization time: Before the spring shoots germinate and after long-term self-shearing, that is, in early March and mid-April, the light quick-acting fertilizer is applied once to make the spring shoots neat and robust and the leaves turn green in time. The fertilization amount is 0.5 kg of manure+urea, and 4-8 plants are applied. Young trees planted last autumn should be fertilized for the first time after mid-April.

3. Fertilization method: the newly planted young trees are fertilized by ring spraying, and the initial position is about 20 cm away from the rhizome, and then gradually move out; You can't fertilize the roots.

Third, the new tip management.

1. Remove all flower buds in the germination stage of spring shoots to reduce nutrient consumption and promote the growth of new shoots.

2. Erase the root sprout below the interface.

Fourth, plastic surgery.

1, prop up branches with improper orientation in time to cultivate short, compact and high-yield crowns.

2. Adhere to the principle of cutting less and pulling more, leave more branches and leaves, and keep the inner hall and lower supporting branches.

Five, the main pest control

Common pests in young citrus orchards in spring mainly include red spiders, yellow spiders, aphids and butterfly larvae.

1, orange-red spider, four-point yellow spider

(1) Control index: When the average number of leaves is 3-4 in spring, the drug should be used immediately for control.

② Use of chemical agents: 99% Qingying 150 times solution or 0.5% Salvia officinalis 800 times solution or 5% Jiayu 3000 times solution or 73% propargite 3000 times solution or 15% chlorfenapyr 1000 times solution has good killing ability and poor temperature sensitivity.

2, orange aphid, orange aphid:

When aphid damage is found in the shoot stage, 10% imidacloprid 1000 times solution or 40% chlorpyrifos (Oxfam) 800 times solution.

3. Papilio:

(1) kill larvae artificially.

② Use pyrethroid pesticides, diflubenzuron, etc.

4. Preventive measures for pest control:

(1) Combine comprehensive management with selective management to cultivate and utilize natural enemies of pests.

(2) take turns to use drugs to prevent pests from developing drug resistance.

③ Take medicine carefully and reduce the frequency of taking medicine.