1. Cultivate the soil to promote the robust growth of the plant. From May to June, the temperature and ground temperature increased sharply. The cultivating and cultivating soil can protect the soil, reduce the ground temperature, improve the physical and chemical properties of the soil, and favor root growth.
2. Watering and topdressing in time. The water and fertilizer management method is promoted by the former. Spring tomato grows fast, yields high, requires a large amount of water, and sufficient water and fertilizer is a guarantee for high yield. Before the first ear is sitting, the temperature is still low, and the water can be controlled to prevent the growth. After the first ear is sitting, it is necessary to carry out the first top dressing in time. About 25 kg of NPK compound fertilizer per mu, or 500 kg of chicken manure which is smashed and smashed, or 150 kg of fermented cake fertilizer, watering after ditching. After the second ear is sitting, the second top dressing can be carried out, applying 15kg of diammonium phosphate per acre, or 20kg of NPK compound fertilizer. Every time the topdressing should be watered in time, especially after entering the 5th to 6th months, the dry hot air is serious, and the deep well can be used to water the ground in the evening to reduce the ground temperature, improve the microclimate, reduce viral diseases and promote the robust growth of the plants.
3. Pruning and flowering results. Infinite early-maturing varieties can be cultivated with a single density; single-pruning can be used for self-sealing tops or infinite mid-late varieties. Spring tomato has low temperature in the early stage and high temperature in the later stage. It is unfavorable for pollination and fertilization, and it is not easy to take fruit. Therefore, it is necessary to carry out artificial auxiliary flower preservation and fruit preservation. It can be sprayed with tomato spirit or with a 2.4-D solution.
4. Strengthen pest and disease prevention and control.
(1) Prevention and treatment of diseases: 1 leaf mold, early blight and gray mold. Early low temperature, these diseases are more likely to occur, in addition to strengthening field management, the application of 25% Rui Du Rui 700 times solution, or 72.2% Pu Leke water 800 times solution, or 64% anti-virus WP 1500 times solution spray Can effectively prevent the occurrence of diseases. 2 viral disease. In the high temperature and dry period of May-June, the virus disease is serious. In the early stage of the disease, spray with 1.5% phytotoxic water agent 800-1000 times solution, or 0.15% potassium permanganate solution, or 5% toxic acid clear 500 times solution, once every 7 days, even spray 3 times. 3 powdery mildew and anthrax. In the late high temperature and drought, it is necessary to pay attention to the prevention and control of powdery mildew. In the case of high temperature and high humidity, it is necessary to timely control the diseases such as anthracnose, and the dew speed net or ruuba has excellent control effects.
(2) Pest control: mainly aphids. To prevent it from spreading, it can be sprayed with 2.5% of the enemy killing 4000 times of liquid or 25% of the day sweeping 2000 times or 2.5% of the emulsifiable concentrate 300-400 times. The use of high-efficiency and low-toxic pyrethroid pesticides and biological pesticides can effectively prevent and cure various pest damages.
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