First, the need for fertilizer characteristics
Melon is an annual vine herb with a well-developed root system, strong drought tolerance, and good sandy soil. Melon needs a large amount of fertilizer. Studies have shown that for every 1000 kilograms of melon produced, it is necessary to absorb N 3.5 kg, P205 1.7 kg, K2O 6.8 kg, absorb nutrients at the seedling stage, and absorb nitrogen, phosphorus and potassium gradually. Increase, flowering to the end of fruit expansion is the period in which melon absorbs the most nutrients, and is also the maximum efficiency period of fertilizer.
Second, fertilization technology
1. Applying the base fertilizer: The base fertilizer is mainly based on farmyard manure, generally 2000-3000 kg of organic fertilizer applied in mu, 60-60 kg of potassium sulfate compound fertilizer, 0.5-1.0 kg of borax plus 5-10 kg of magnesium sulfate.
2. Early application of seedling fertilizer: 10 days after transplanting, the seedling fertilizer is applied, and the general application of potassium sulfate type high nitrogen compound fertilizer is 5-10 kg, combined with watering.
3. Re-applying the expanded melon fertilizer: After flowering and pollination, the fruit grows to the size of the egg and begins to enter the expansion period. The upper leaves and fruits develop into the peak period of fertilizer demand, and the fertilizer is re-applied in this period. The application of sulfuric acid-type high-nitrogen potassium compound fertilizer is about 20 kg, and it is applied with water.
4, skillful application of root fertilizer: flowering period, can be sprayed with 0.2% potassium dihydrogen phosphate solution to increase its sweetness and yield.
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