For the transplanting and planting of vegetable seedlings in winter, because the temperature of the seedling shed before transplanting and the temperature of the vegetable shed after planting are different, and the humidity also changes, including environmental changes such as ventilation and light, the vegetable seedlings after transplanting often appear wilted, dead seedlings, slow seedlings, and no growth at all. How can we do not wilt, do not die, slow down the seedlings quickly, and then make the seedlings strong?
First of all, the root system of the vegetable seedlings that have just been transplanted and planted must be similar to the soil temperature environment of the previous growth, so that they can grow roots faster and better, slow down the seedlings, so as to survive, whether the soil temperature or the ambient temperature is too high or too low when the vegetables are planted, this is not conducive to the root growth of the planted seedlings, and is not conducive to survival.
Generally speaking, when the vegetable seedlings are just transplanted and planted, it is best to ensure that the soil temperature is between 15 and 22 degrees between 5 and 10 cm underground. For example, the optimal soil temperature for tomatoes, cucumbers, and eggplants is 18 to 22 degrees Celsius, while for cold-loving celery, spinach, and coriander, the optimal soil temperature for planting is 15 to 20 degrees. When the soil temperature is higher than 25 degrees, it is easy to grow vigorously or senescence, and the soil temperature is lower than 12 degrees, which can easily lead to slow rooting and weak leaf yellow seedlings after planting.
In order to make the soil temperature closest to the original environment and let the planted vegetable seedlings take root as soon as possible, the morning or noon temperature of a sunny day should be selected for transplanting and planting. When planting, pay attention to covering the mulch film to ensure that there is a high ground temperature.
Secondly, the watering of vegetable seedlings before and after planting. Before the vegetables are customized, it is necessary to water the seedlings thoroughly to facilitate the seedlings and avoid the seedlings from hurting the roots. This is very helpful to shorten the seedling slowing time after vegetable planting and improve the survival rate of vegetables after planting.
When planting vegetables, it is necessary to grasp the depth of planting, generally to "do not bury the heart, do not leak the roots" as the standard, planting in winter and spring, should not be watered immediately a large amount of water, farmers do not think about the watering action, often not conducive to the slow survival of the seedlings. Under normal circumstances, about 80% soil moisture is the most conducive to the survival of planted seedlings. After planting, just pour less water in the planting hole or planting ditch. After the planting is completed, find a weather with good weather and soil temperature rising, carry out a hoeing shallow tillage, 3 to 5 days later, according to the seedling situation, properly water the seedlings once, remember to cover the plastic film in time to keep warm.
Again, under normal circumstances, the planting of vegetable seedlings in the low temperature season should be kept warm and moisturized, the temperature should be guaranteed to be 18 degrees to 20 degrees, and the humidity should be guaranteed to be about 80%, which is most conducive to the planting seedlings to grow new roots. On the one hand, it is necessary to pay attention to pouring planting water after planting, and then seal the greenhouse to heat up, and at the same time, it is necessary to maintain a high humidity in the greenhouse to slow down the seedlings. Do not ventilate within two or three days after planting, which is beneficial to increasing the soil temperature, but if the temperature in the shed reaches more than 30 degrees, you can open a small opening for short-term ventilation and cooling.
Finally, three to five days after the transplanting and planting of vegetable seedlings, if the planted seedlings grow new leaves at the top, and the underground roots also grow new roots, and the seedlings no longer appear at noon when the stems and leaves shrank and wilt, it means that the vegetable seedlings have been successfully transplanted and the seedlings have been successfully slowed down, and have survived.