The demand for fertilizer in tomato is high at all stages of growth, and the absorption of nutrients is large, and it increases with the growth and development of flowering and the result of flowering. The absorption period of nutrients is at the peak of the results.
After the first ear is set, it is necessary to apply a fruit-feeding fertilizer in combination with watering. Each acre can be applied with 15-20 kg of urea, 20-25 kg of superphosphate, or 20-30 kg of diammonium phosphate. Potassium sulfate should be applied 10 kg when potassium is deficient. It can also be applied with 1000 kg of decomposed human excrement and 100 kg of grass ash instead of chemical fertilizer. Later, when the second ear and the third ear began to expand rapidly, each was topdressed once. When the fourth spike of the elevated cultivation begins to expand rapidly, it must also be topdressed. Top dressing can be buried in the ground or watered. The former should pay attention to deep application and sealing, and the latter should pay attention to the amount of fertilizer to prevent burning.
In addition to soil topdressing, tomato cultivation also requires foliar topdressing. The external top dressing can be sprayed with 0.2%-0.4% potassium dihydrogen phosphate, or 0.2%-0.3% urea, or 2% aqueous calcium superphosphate solution. When the fruit is rapidly expanding, such as insufficient fertilizer and water, the fruit is not well-developed, the fruit becomes smaller, and the yield is significantly reduced.
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