Fertilizer application in greenhouse tomato leaves usually starts from the fruit set, until the plant pulls, and plays an important role in the formation of tomato yield. Foliar fertilization should adopt different management methods for different situations, and specific attention should be paid to the following points.
To determine the type of nutrition based on the growth of tomatoes. In general, early results, plant growth is relatively strong, easy to grow, should use less to promote the growth of leaf and leaf foliar fertilizer, potassium dihydrogen phosphate, compound fertilizer can be used. At the end of the results, the growth potential of the plants began to debilitate and the foliage nutrients that promote the growth of stems and leaves should be used to promote the protection of the leaves. Various special foliar nutrient solutions could be used.
According to the weather conditions, determine the type of nutrition. Rainy weather, lack of light in the greenhouse, poor photosynthesis, insufficient supply of sugar for the tomato, and better foliar spray.
The leaves were sprayed with calcium fertilizer in time. Tomato fruit growth requires more calcium, soil calcium deficiency, the fruit prone to umbilical rot. Therefore, it is advisable to spray calcium fertilizer such as calcium chloride, superphosphate, calcium amino acid, and calcium supplement to meet the tomato calcium requirement during the tomato fruiting period.
The interval between fertilization on tomato leaves should be appropriate. The suitable interval for fertilizing tomato leaves is 5-7 days, in which the interval time for inorganic fertilisers that are easy to produce fertilizer on foliar sprays should be longer, generally not less than 7 days, and the spraying time for organic nutrition can be appropriately shorter. Generally about 5 days is appropriate.
Tomato foliar fertilizer should be combined with disease prevention. Foliar application often results in a significant increase in air humidity in the protected area, which can easily cause tomato disease. Therefore, the number of sprayed fertilization materials on cloudy days is less, and a protective bactericide is added during fertilization, and a short period of ventilation is used after fertilization to reduce the incidence.
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