Tomato leaves fertilization precautions

1. Determine the type of nutrients based on the growth of tomatoes. In general, the results of early plant growth is relatively strong, easy to grow long, should use less to promote the growth of stems and leaves foliar nutrients, can use potassium dihydrogen phosphate, compound fertilizer and so on. The results of the growth period of the plant growth potential began to decline, and more use of leaf nutrients to promote the growth of stems and leaves to promote conservation of leaves, can choose urea, sugar and so on.

2. Determine the type of nutrients according to the weather conditions. In the rainy days, the lack of sunlight in the greenhouse and poor photosynthesis make the sugar supply of the two red persimmons insufficient, and the effect of spraying sugar on the leaves is better.

3. Spray foliar calcium fertilizer in time. Tomato fruit growth requires more calcium, soil calcium deficiency, the fruit prone to umbilical rot. Therefore, calcium chloride, superphosphate, and calcium supplements should be sprayed during the two red persimmon fruiting stages to meet the tomato's need for calcium.

4. The interval between fertilization on tomato leaves should be appropriate. Appropriate time interval for fertilizing tomato leaves is 5-7 days. Spraying inorganic fertilizers on the leaves is easy to produce fertilizers, so the interval time should be longer and generally should not be shorter than 7 days.

5. Tomato leaf fertilization should be combined with disease prevention. Foliar fertilization in winter and spring seasons often results in a significant increase in air humidity in the protected areas, and can easily cause tomato diseases. Therefore, the number of sprayed fertilization materials on cloudy days should be less, and the protective fungicides such as Antaisheng and DuPont EPC should also be added during fertilization, and short-term ventilation should be carried out after fertilization to reduce the incidence.

6. Shi Xi surface fertilizer to be appropriate. When injury occurs, flush the excess fertilizer with water and increase the water content of the leaves to reduce the damage to the leaves. When the soil moisture content is insufficient, it should be watered to increase the water content of the plant body and reduce the concentration of fertilizer solution in the stems and leaves.

Author: Wu Zengguang