Tomato required fertilizer characteristics

Tomatoes are solanaceous vegetables that require more fat and are more fertile. Its demand for nitrogen, phosphorus, and potassium is the most potassium, followed by nitrogen and phosphorus. Production of 75,000 kilograms of tomato per hectare requires absorption of N105-225 kg, P2O522.5-37.5 kg, K2O180-405 kg from the soil. The ratio of the three is 1:0.2:1.7.

The absorption of nutrients in different growth stages of tomato is different, and generally increases with the growth period. In the seedling stage, nitrogen is the main nutrient. When the first fruit starts, the absorption of nitrogen, phosphorus, and potassium rapidly increases. Nitrogen accounts for 50% of the three elements and potassium only accounts for 32%. At the beginning of the harvest period, nitrogen accounted for only 36%, while potassium accounted for 50%, resulting in a phosphorus absorption of approximately 15%. Tomatoes need potassium is characterized by a linear rise from the fruit set, potassium absorption during fruit enlargement accounts for more than 70% of the total potassium absorption during the whole growth period. Until the late harvest, the absorption of potassium decreased slightly.

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