Detailed Explanation of Tomato Fertilization Timing and Methods

Apply sufficient base fertilizer when preparing the soil, and when making the beds, apply high-quality fertilizer in furrows or planting holes. From transplanting until fruit set, apply a light dressing of clear manure water. After the flower clusters set fruit, apply 30% human manure and urine as a liquid dressing, 1-2 times. When the fruits swell rapidly, apply 40% concentration human manure and urine once every 10 days. During the fruit growth period, carry out 2-3 foliar sprays, mainly using monopotassium phosphate, urea and boron fertilizer.

1. Base fertilizer: With sufficient base fertilizer, seedlings emerge early and grow quickly in the early stage, and both vegetative growth and reproductive growth are good. Usually, 5000 kg of barnyard manure is broadcast per mu, and when making the beds, high-quality fertilizer such as cake fertilizer and dried manure is applied in furrows or planting holes at 100 kg, along with 20-25 kg of compound fertilizer. When applying base fertilizer, do not use too much nitrogen; nitrogen, phosphorus and potassium should be balanced.

2. Topdressing: From transplanting until fruit set, except when the plants are deficient in fertilizer and a light dressing of clear manure water should be applied, topdressing should generally be controlled. After the flower clusters set fruit, the plants need to branch, the young fruits need to swell, and they continue to flower and set fruit, so nutrient consumption is high. Generally, 30% human manure and urine is applied as a liquid dressing, 1-2 times. When the second and third trusses of fruit swell rapidly, nutrients must also be supplied continuously to meet growth needs. At this time, the method of frequent and vigorous topdressing should be adopted, generally applying 40% concentration human manure and urine once every 10 days on sunny days.

3. Foliar fertilizer: During the fruit growth period, especially when continuous rain in the early stage prevents ground topdressing, carry out 2-3 foliar sprays. The application concentration of monopotassium phosphate is 0.2%-0.5%, and mixed spraying with 0.2-0.3% urea gives better results; at the flowering stage, spray once with a 30 mg/kg boric acid solution to increase the content of vitamins and soluble solids in tomatoes and improve tomato quality.