Planting tomatoes in the open air is a traditional planting mode. In many places, it is planted outdoors in spring. Through related technologies, tomatoes can be planted early and listed in advance, and more benefits can be obtained. So what technical essentials should we pay attention to when planting tomatoes in spring dew?

The first is seed selection.

To choose seeds according to the local climate and weather, we must choose varieties suitable for local cultivation. The seeds selected for planting in spring dew field must have high yield, low light tolerance, low temperature tolerance and resistance to diseases and insect pests, especially early blight, gray mold and late blight, which should not only have strong resistance, but also adapt to high humidity weather.

Secondly, land selection and land consolidation.

Open-air planting can be done without continuous cropping, and you can choose land where solanaceous vegetables have not been planted for two or three years. Deeply ploughing and ridging the land in advance, the soil irradiated by sunlight can play the role of sterilization and disinfection, reduce pests and diseases, and be conducive to the vigorous growth of seedlings.

We can spread some quicklime evenly in the soil while turning the ground, which can not only improve the pH value of the soil, but also kill bacterial wilt and make the virus food multiply in an acidic environment.

After deep ploughing, about half a month before making a decision, prepare soil, apply base fertilizer and water. Generally, 5 kg of organic fertilizer, 0/00 kg of calcium superphosphate/kloc and 200 kg of cake fertilizer should be applied per mu of land, and all fertilizers should be fully mixed with soil.

Finally, technical management.

Water and fertilizer management is very important. During the seedling growth period, if there is serious water shortage, plants will grow slowly and drop flowers, causing various virus diseases. Although there is no shortage of water during this period, you should not water too much, which will reduce the ground temperature and is not conducive to delaying seedlings.

Water the seedlings slowly within three to five days after planting. At this time, the water must be sufficient to ensure the humidity of the soil, which can help the roots of seedlings germinate quickly and penetrate into the soil. Be sure to prevent soil from hardening after watering.

In the process of tomato growth, it is easy to drop flowers and fruits. There are many reasons for this situation, such as improper high or low temperature, insufficient sunlight, insufficient fertilizer, malnutrition and too much rain. Rational use of growth regulators can not only prevent falling flowers and fruits, but also prevent the occurrence of gray mold.