In the spring, the cold tail is warm, and the temperature at this time is very unstable. In addition to doing field management, we must prevent these two situations. Especially vegetable seedlings, a little mismanagement, not only waste investment, but also may delay the optimal timing of vegetables.

Vegetable seedling

Vegetable seedlings are the cultivation techniques of the vegetables to be cultivated, first planted in the seedbed, and then transplanted to the field after the seedlings grow to a certain extent. It has the advantages of cultivating strong seedlings, facilitating centralized and fine management of seedling stage, entering into the field in advance, and growing quickly after transplanting.

What problems should be paid attention to in vegetable seedlings?

1, 沤 (ou) root

The most common disease during vegetable seedlings is roots, especially in early spring, where roots are most common and serious. When the seedlings are rooted, the young roots of the roots are brown rot, the aboveground part loses the source of nutrients, becomes wilting and yellow, and the seedlings eventually die.

Occurrence factor:

It has a great relationship with temperature and humidity. During vegetable seedlings, the growth temperature should be around 25 degrees Celsius. If the temperature is too low, it is prone to rooting. The seedbed soil or seedling nutrient nutrient water content is large, if the humidity is too high, it is easy to cause root hypoxia, causing seedling roots.

Precaution:

Try to choose seedlings in the facility to ensure adequate temperature. However, the nursery and the field should be separated as much as possible to avoid some diseases; the soil of the seedbed should be as good as possible, and the place where irrigation and drainage is convenient to not accumulate water is better; try to control the amount of watering and the number of watering, the soil is basically dry and wet. In the rainy days, try not to water; when the roots are rooted, timely ventilation and wetting, planting grass ash and dry soil in the field to reduce the humidity and heat preservation; and spraying hormones to improve the stress resistance of the seedlings and promote new roots Giving birth.

2, low temperature chilling

Cold damage in early spring, and late spring frost are the phenomenon of freezing damage often encountered during vegetable seedlings. It is the main factor causing rotten roots and dead seedlings in spring.

Precaution:

Pay close attention to the weather changes, add heating facilities in the facility before the cold current, or temporarily build a warm shed, mulch, etc., to improve the temperature inside the shed and prevent freezing damage. Before the frost comes, the field will cultivate the loose soil in time, which will not only improve soil permeability, reduce humidity, but also play a role of heat preservation, thus reducing the degree of frost damage.

After the seedlings are released, the seedbed is ventilated in time, and the seedlings are subjected to low temperature exercise to improve the adaptability of the seedlings to the cold current. The ventilation and ventilation time should be determined according to the weather conditions, and the ventilation time should be extended accordingly when the temperature is high. Before the frost comes, the seedlings can be sprayed with water to slow down the surface temperature of the seedlings, so that the seedlings can adapt to the temperature of the sudden drop.

The above is the precautions for early spring vegetable seedlings. As long as these two points are managed well, there is absolutely no problem in seedling survival!

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