Key points for attention in the use of foliar Fertilizer in Tomato

The use of foliar fertilizer for tomato should pay attention to the following points: 1. Generally speaking, the types of nutrients should be determined according to the growth of tomato. As a result, the early plant growth is relatively exuberant and easy to grow, and foliar nutrients that promote stem and leaf growth should be used less. Potassium dihydrogen phosphate and compound fertilizer can be selected. Results during the peak period, the plant growth began to weaken, and foliar nutrients to promote stem and leaf growth should be used to promote seedling and leaf protection, such as urea, sugar and so on. 2. The type of nutrients should be determined according to the weather conditions. In cloudy and rainy days, the light in the greenhouse is insufficient and the photosynthesis is poor, so the sugar supply of tomato is insufficient, so the effect of spraying sugar on the leaves is better. 3. Timely spraying calcium fertilizer on leaves requires more calcium for tomato fruit growth. When the soil calcium supply is insufficient, the fruit is prone to navel rot. Therefore, calcium chloride, calcium superphosphate, calcium amino acid and calcium supplementation should be sprayed in the tomato fruiting period to meet the calcitonin needs of tomato. 4. The suitable interval of tomato foliar fertilization is 5-7 days. Spraying inorganic fertilizer on the leaves is easy to produce fertilizer damage, so the interval should be longer, generally not less than 7 days. The interval of spraying organic nutrient fertilizer can be shorter, generally about 5 days. 5. Foliar fertilization of tomato should be combined with disease control in winter and spring. Foliar fertilization in winter and spring will often increase the air humidity in the protected field and easily lead to tomato diseases. Therefore, the number of foliar fertilizer spraying in continuous cloudy days is less, and protective fungicides such as Antaisheng and DuPont Yibao should be added when applying fertilizer, and ventilation should be carried out for a short time after fertilization to reduce the incidence of disease. 6. When foliar fertilizer is applied properly, the excess fertilizer should be washed away with clean water, and the water content of the leaf should be increased to alleviate the damage degree of the leaf. When the soil water content is insufficient, it should be watered to increase the water content in the plant and reduce the fertilizer concentration in the stem and leaf.