Foliar fertilization in greenhouse tomatoes generally begins after fruit set and until the plants are pulled, which plays an important role in the formation of tomato yield.
1. Determine the type of nutrition according to the growth of tomato: Generally speaking, in the early stage, the growth of the plant is relatively strong, and it is easy to grow. It should use less foliar nutrition to promote stem and leaf growth, and potassium dihydrogen phosphate or compound fertilizer can be used. At the peak of the period, the growth potential of the plant began to weaken. The leaf nutrients that promote the growth of stems and leaves should be used to promote the leaf protection. Urea, sugar and Dayuan No.1, Jiagean and other leaf-specific nutrient solutions can be used.
2, according to the weather conditions to determine the type of nutrition: snowy weather, insufficient light in the greenhouse, poor photosynthesis, tomato sugar supply is insufficient, foliar spray effect is better.
3, the leaf surface in time to apply calcium fertilizer: in the tomato fruit period, it is recommended to spray calcium chloride, superphosphate, amino acid calcium, calcium and other calcium fertilizer to meet its needs for calcium.
4, the interval between foliar fertilization should be appropriate: the appropriate interval is 5-7 days. The interval of inorganic fertilizer spraying is generally not less than 7 days, and the interval of organic fertilizer is generally about 5 days.
5, foliar fertilization should be combined with disease prevention: even the number of spraying fertilizer on the leaves of the cloudy day is less, adding protective fungicides when fertilizing, and short-term ventilation after fertilization to reduce the incidence.
6. Improper use of foliar fertilizer: When the wounded leaves occur, rinse the leaves with clean water, rinse off the excess fertilizer, and increase the water content of the leaves to alleviate the damage of the leaves. When the soil water content is insufficient, watering is also required to increase the water content in the plant and reduce the concentration of the fertilizer in the stems and leaves.
1. Determine the type of nutrition according to the growth of tomato: Generally speaking, in the early stage, the growth of the plant is relatively strong, and it is easy to grow. It should use less foliar nutrition to promote stem and leaf growth, and potassium dihydrogen phosphate or compound fertilizer can be used. At the peak of the period, the growth potential of the plant began to weaken. The leaf nutrients that promote the growth of stems and leaves should be used to promote the leaf protection. Urea, sugar and Dayuan No.1, Jiagean and other leaf-specific nutrient solutions can be used.
2, according to the weather conditions to determine the type of nutrition: snowy weather, insufficient light in the greenhouse, poor photosynthesis, tomato sugar supply is insufficient, foliar spray effect is better.
3, the leaf surface in time to apply calcium fertilizer: in the tomato fruit period, it is recommended to spray calcium chloride, superphosphate, amino acid calcium, calcium and other calcium fertilizer to meet its needs for calcium.
4, the interval between foliar fertilization should be appropriate: the appropriate interval is 5-7 days. The interval of inorganic fertilizer spraying is generally not less than 7 days, and the interval of organic fertilizer is generally about 5 days.
5, foliar fertilization should be combined with disease prevention: even the number of spraying fertilizer on the leaves of the cloudy day is less, adding protective fungicides when fertilizing, and short-term ventilation after fertilization to reduce the incidence.
6. Improper use of foliar fertilizer: When the wounded leaves occur, rinse the leaves with clean water, rinse off the excess fertilizer, and increase the water content of the leaves to alleviate the damage of the leaves. When the soil water content is insufficient, watering is also required to increase the water content in the plant and reduce the concentration of the fertilizer in the stems and leaves.
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