At present, it is time for the nursery period of greenhouse eggplants and greenhouse solane vegetables. Since I have to save winters and winters, there are few rains and snows, spring is warmer and early, and many places are ready to colonize the greenhouse. However, according to the meteorological situation for many years, at present, although the temperature has rebounded, the possibility of spring snow and frost is relatively high, and the ground temperature is not yet stable, which is unfavorable to the slow seedlings. Therefore, in the recent nursery work, hardening seedlings should be built around the ability to enhance the low temperature tolerance and drought tolerance of the seedlings.
First, cold-resistant exercise. Practice has shown that, after low-temperature exercise, eggplant seedlings can significantly improve adaptability, can endure the general frost, and quick seedlings after planting, hair early. However, cold exercise should be carried out step by step, and it is not possible to cool down at once by lest the seedlings be frozen. It is generally about one week before the seedlings are planted and the seedbed temperature is reduced. As far as possible tomato seedbed 15 °C ~ 18 °C during the day, night 10 °C ~ 13 °C; eggplant pepper bed seedlings during the day 18 °C ~ 25 °C, night 13 °C ~ 15 °C.
Second, drought-resistant exercise. Keep the top soil of the seedbed dry and wet, and see it not wet. That is, seedbeds are not very dry and generally do not water. If the nursery bed is water-reduced before hardening, it can be watered in small quantities. At the same time as far as possible to do a good job of ventilation, reduce seedbed air humidity and soil moisture, under the premise of not affecting the seedbed temperature, as far as possible to increase the vent, extended ventilation time.
Third, pay attention to two issues. First, the time for hardening seedlings should not exceed one week. If the time is too long, the seedlings may be subject to aging and form old seedlings. It is not easy to slow seedlings after planting. Second, if the humidity of the seedbed is low and there is less water loss, the humidity of the seedbed will not fall down; watering before the seedlings will be too much water, which is also not conducive to seepage of water in the seedbed soil, and will also cause the humidity of the seedbed not to fall.
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