Fertilizer application to greenhouse tomato leaves usually begins after fruit set and until the plants pull, which plays an important role in tomato yield formation.
1, according to the growth of tomatoes to determine the type of nutrition: In general, the results of the previous period, plant growth is relatively strong, easy to grow, should use less to promote the growth of leaf and leaf nutrition, potassium dihydrogen phosphate, compound fertilizer can be used. At the end of the result, the growth potential of the plants began to weaken, and the leaf nutrients that promote the growth of stems and leaves should be used to promote the protection of the leaves. Urea, sugar and special foliar nutrients such as Dayuan No. 1 and Jiakean can be used.
2, according to the weather conditions to determine the type of nutrition: cloudy snow weather, lack of light in the greenhouse, poor photosynthesis, tomato sugar supply is insufficient, leaf spray effect is better.
3, foliar spray calcium fertilizer in a timely manner: In the tomato result phase advocated spraying calcium chloride, calcium superphosphate, calcium amino acid, calcium and other calcium supplement to meet its needs for calcium.
4. The interval between foliar fertilization should be appropriate: the appropriate interval time is 5 to 7 days. The interval between inorganic fertilization and fertilizer spraying is generally not less than 7 days, and the interval between organic fertilizers is generally about 5 days.
5, foliar fertilization should be combined with disease prevention: even cloudy days spray spray fertilizer material to the less, add fertilizer when the protective bactericide, and short-term ventilation after fertilization to reduce the incidence.
6. Improper use of foliar fertilizer: When injury occurs, wash the leaf surface with water, rinse off excess fertilizer, and increase the water content of the leaves to ease the degree of leaf damage. When the soil moisture content is insufficient, watering is also required to increase the water content of the plant body and reduce the concentration of fertilizer solution in the stems and leaves.
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