What should I pay attention to when growing vegetables?

Seedling raising is an important measure to bring vegetables to the market early and increase yield, which has the advantages of winning seasons, expanding planting scope, saving land and facilitating seedling management. As the saying goes, "thirty percent of the young plants are strong." The quality of seedlings is directly related to vegetable production and economic and social benefits.

1. Root retting is the most common disease in vegetable seedling, which occurs widely and seriously in early spring. When the seedlings are timid, the tender root bark can be seen to rot in dark brown, and the ground part loses nutrition, which will wither and become more and more yellow, and finally the seedlings will wither.

It has a lot to do with temperature and humidity. At the seedling stage of vegetables, the temperature of growth and development should be around 25 degrees Celsius. If the temperature is too low, it is easy to have a situation. The water content of nutrients in seedbed soil or seedling substrate is very high. If the humidity is too high, it is easy to cause insufficient oxygen in the roots, which will lead to the seedlings entering the roots again.

Try to select seedlings in the equipment to ensure sufficient temperature. But the nursery area should avoid vilen as far as possible to prevent some diseases. Seedbed soil should be selected as permeable as possible, which is beneficial to irrigation and drainage, but impermeable. Try to control the amount and frequency of watering. The soil is mostly dry and wet. Should we water it in rainy days? Ventilation should be done in time to disperse dampness, and embers and dry soil should be scattered in the field to reduce humidity and keep warm.

2. Low temperature injury Early spring freezing injury and late spring frost are common freezing injuries in vegetable emergence. This is also the main factor causing root rot and seedling blight in spring.

Pay close attention to the change of temperature. Before the cold current comes, we should upgrade the heating equipment on the mechanical equipment, or temporarily build a warm shed and cover to increase the temperature in the shed and avoid freezing injury. Before the frost comes, we should plough the fields in time to loosen the soil, which not only improves the permeability of the soil and reduces the humidity, but also brings the effect of heat insulation, thus reducing the harm of frost.

After the seedlings germinate, it is necessary to ventilate the seedbed in time, exercise the seedlings at low temperature, and enhance the adaptability to the cold current. The ventilation volume and ventilation time should be clear according to the weather conditions, and the ventilation time should be increased accordingly when the temperature is high. Sprinkle water on the seedlings before frost to slow down the surface temperature of the seedlings, so that the seedlings can be integrated with the sudden drop of temperature.