What kind of fertilizer do tomatoes use?

It is recommended to use fully mature organic fertilizer combined with biological bacterial fertilizer and balanced potassium sulfate compound fertilizer, as well as a certain amount of calcium fertilizer and boron fertilizer. Generally without fertilization before flowering, foliar application of potassium dihydrogen phosphate plus calcium amino acid foliar fertilizer accelerated Leboron plus brassine to promote flower bud differentiation and improve fruit setting rate. Balanced water soluble fertilizer was applied at the initial stage of fruit setting, high potassium water soluble fertilizer was applied during fruit expansion period, calcium fertilizer was added in time, and calcium glycol calcium or chelate calcium was sprayed on leaves to promote fruit expansion.

Fertilization time and amount of tomato

According to the fertilizer demand characteristics of tomato, under the premise of cultivating strong seedlings, tomato fertilization should be based on base fertilizer, combined with 57.7 tons of high-quality organic fertilizer per mu, and 68kg of phosphate fertilizer and 7kg of potash fertilizer per mu.

Tomato "seedling fertilizer" was applied once 5-6 days after planting, applying 2-3 kg of nitrogen fertilizer (urea) per mu.

When the first ear of tomato began to expand, "fruit-promoting fertilizer" was applied with nitrogen (urea) 3-4kg per mu.

When the tomato enters the full fruit stage, when the first ear is white and the second and third ear expand rapidly, topdressing should be applied 2 times and 3 kg of nitrogen (urea) per mu, and the previous time can be mixed with 1.5 kg phosphorus and potassium respectively, in order to improve the fruit quality.

After the tomato enters the full fruit, the fertilizer absorption capacity of the root system decreases, and foliar spraying can be carried out, such as 0.3% 0.5% urea, 0.5% potassium dihydrogen phosphate, 0.1% borax, etc., in order to delay senescence and increase the harvest time.

For tomato fertilization under protected cultivation, it is necessary to prevent the salt barrier caused by excessive fertilization. When fertilizing, the input of organic fertilizer should be increased, and the amount of chemical fertilizer can be reduced by 20% to 30% compared with the open field, and should be applied a small amount of time, and attention should be paid to timely irrigation and salt pressure, so as to promote the growth and development of tomato.