As a warm and drought-tolerant crop in summer, watermelon requires a lot of fertilizer, and scientific fertilization is the key to high-quality and high-yield watermelon.
The amount of fertilizer absorbed by watermelon during the seedling period was 0.6% of the total absorption, the elongation period accounted for 14.6% of the total absorption, and the melon period accounted for 84.8% of the total absorption. Therefore, the fertilizer should be based on the base fertilizer, and the application of nitrogen, phosphorus and potassium. The specific conditions are as follows: the base fertilizer is generally made of decomposed high-quality organic fertilizer, 3000-4000 kg of organic fertilizer per mu, 100 kg of cake fertilizer, 15-20 kg of urea, 35-50 kg of superphosphate, 25-30 kg of potassium sulfate, and deep through The soil is applied; the seedlings grow two pieces of true leaves, Zhihua can apply potassium sulphate compound fertilizer to ensure the seedlings grow vigorously; when the vine grows to 40-50 cm, combined with watering, apply urea 15-20 kg per mu, potassium sulfate 10 -15 kg; then, when the first batch of young melon grows to the size of the egg and fades the hair, 25-30 kg of potassium sulfate compound fertilizer is applied per acre.
In this way, not only can the watermelon be vigorously grown in every growth stage, but also the fruit juice expansion and sugar accumulation in the fruiting stage can be promoted to ensure the commerciality of the fruit.
Watermelon can not be fertilized too much at the seedling stage, and the fertilization site should not be too close to the root, about 10 cm away from the main root to prevent rooting.
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