Compared to other crops, tomatoes are less demanding on the growing conditions, however soil fertility also plays a great importance. The dosage of mineral fertilizers for this crop is calculated individually to the needs of the soil, but the optimal norm of introduction is 90kg/ha of nitrogen, 90kg/ha of phosphorus and 90kg/ha of potassium. Assimilation of mineral nutrients depends on the growth phase of tomato.
From the start of development and before the period of flowering this culture requires sufficient supply of phosphorus and potassium. Phosphorus promotes the development of reproductive organs of plants, accelerates ripening, provides simultaneous ripening, improves the harvest quality. Fertilization should be done using digestible forms of phosphorus in the period from the beginning of the sprouting to the formation of the 6th leaf. Potassium regulates carbohydrate metabolism in tomatoes, increases the proportion of dry weight of the vegetable and improves the photosynthesis process. Most of it is consumed in the period starting from the formation of ovaries till the beginning of ripening.
Nitrogen nutrition of tomatoes is extremely important at the stage of intensive growth. Nitrogen fertilizers stimulate rapid growth and increase the yield of plantations. However, oversupply of this element causes excessive growth of the tomato stem and deceleration of vegetable ripening.
Positive impact on yield can be achieved via under-root fertilizing and daily fertilizing through drip irrigation. We recommend introduction of microfertilizers containing boron, zinc and manganese, as well under-root fertilizing with a solution of salts of these elements for the soils with a deficient in moving compounds.
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