Foliar fertilization in greenhouses generally begins after fruit set and continues until the plants pull, which plays an important role in the formation of tomato yield. Foliar fertilization should adopt different management methods for different situations in a timely manner, and specific attention should be paid to the following points: 1. The type of nutrition should be determined according to the growth of tomatoes. In general, the results are prosperous and the plant growth is relatively strong. Foliar nutrition that promotes the growth of stems and leaves should be used less. Potassium dihydrogen phosphate, compound fertilizer, etc. 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 sunlight in the greenhouse, poor photosynthesis, the lack of supply of tomatoes, sugar foliar spray better. 3. Spraying calcium fertilizer on foliar in time: Tomato fruits need more calcium for growth, and when the soil is insufficient for calcium, the fruit is prone to umbilical rot. Therefore, in the tomato's result period, it is advisable to spray calcium chloride, calcium superphosphate, calcium amino acid, calcium supplement and other calcium fertilizers to meet the needs of tomatoes for calcium. 4. The interval between fertilization on tomato leaves should be appropriate: the appropriate interval for fertilizing tomato leaves should be 5-7 days. Wherein, the inorganic fertilisers that are easy to produce fertilizers on the foliar spray should have longer intervals, generally not less than 7 days, and the organic nutrient spraying time can be appropriately shorter, generally about 5 days. 5, tomato leaf fertilization should pay attention to the combination of disease prevention and prevention: greenhouse greenhouse fertilization in the winter and spring season will often result in significant increase in air humidity protection, easy to cause the incidence of tomatoes. Therefore, the number of sprayed fertilization materials on cloudy days is less. When fertilizing, protective fungicides such as Antaisheng and Dupont are added, and short-term ventilation is used after fertilization to reduce the incidence. 6. Improper use of foliar fertilizers; when injury occurs, rinse the leaf with water, rinse off excess fertilizer, and increase the water content of the leaves to reduce the damage to the leaves. 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. China Agricultural Network Editor