litchi

Fertilization principle

(1) Pay attention to the application of organic fertilizers, fertilize according to the growth period, rationally mix nitrogen, phosphorus and potassium fertilizers, adjust fertilization plans according to factors such as litchi variety, growth and climate.

(2) Strong acid orchard in soil, apply appropriate amount of lime, calcium magnesium phosphate fertilizer to adjust soil pH and supplement corresponding nutrients.

(3) Using appropriate fertilization methods, targeted application of trace element fertilizers.

(4) The fruit development period is positive in the rainy season. The nitrogen fertilizer should use ammonium nitrogen fertilizer as much as possible to avoid using urea or nitrate nitrogen fertilizer.

(5) Fertilization combined with other management measures, such as drip irrigation, drip irrigation, fertilization, fertilizer application, etc.

2. Fertilization advice

(1) The result is that the tree is about 50 kilograms per plant: 10-20 kg of organic fertilizer per plant, 0.75-1.0 kg of nitrogen fertilizer (N), 0.25-0.3 kg of phosphate fertilizer (P2O5), and 0.8-1.1 kg of potassium fertilizer (K2O). Kilograms, calcium fertilizer (Ca) 0.25 ~ 0.35 kg, magnesium fertilizer (Mg) 0.07 ~ 0.09 kg.

(2) Young trees with no fruit or less results: 5-10 kg of organic fertilizer per plant, 0.4-0.6 kg of nitrogen fertilizer (N), 0.1-0.15 kg of phosphate fertilizer (P2O5), and 0.3-0.5 kg of potassium fertilizer (K2O). Magnesium fertilizer (Mg) 0.05 kg.

(3) The fertilizer is applied 6 to 8 times after harvesting (2-3 times for one shoot and one fat), before flowering, Xiehua and fruit development. Depending on the growth of the lychee tree, the flower before and the Xiehua fertilizer can be combined, or the Xiehua fertilizer and the strong fruit fertilizer can be combined. The application rate of nitrogen fertilizer in the above four growth stages is 45%, 10%, 20% and 35%. The phosphate fertilizer can be applied once after harvesting or after two times of mining and twice before flowering. The application rate of potassium, calcium and magnesium fertilizer is 30. %, 10%, 20%, and 40%. The potassium dihydrogen phosphate solution can be sprayed during the flowering period.

(4) In the orchard lacking boron and molybdenum deficiency, 0.2% borax + 0.05% ammonium molybdate was sprayed before flowering, Xiehua and fruit expansion period; 0.2% zinc sulfate or compound trace elements were sprayed at the tip of litchi. Orchard with pH<5.0, 100 kg of lime per acre, 5.0 (Source: Ministry of Agriculture)

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