For winter and spring vegetables, cultivating robust plants is the center of management after planting. Robust plants help to increase the plant's own resistance to diseases and plants and its ability to produce continuous results. At present, many vegetables in winter and spring have entered the stage of colonization. In order to improve the survival rate of the seedlings and cultivate robust plants, the author believes that: after planting, temperature management should be carried out, which is beneficial to Miao Qi Miao Zhuang. Warming after planting, promote slow seedlings. In the deep winter season, in order to prevent the seedlings from seedlings from growing slowly under low temperature, the roots will slow down and form a stiff seedling, which will affect the normal development of the plant. Attention should be paid to less or no release of air to increase the temperature inside the shed. Raise the greenhouse temperature is beneficial to the strengthening of the metabolism of the seedlings themselves, which is conducive to rooting, and thus will also help the seedlings. Under normal circumstances, solanaceous vegetables can be kept at 25 °C to 30 °C during the day, melons at 28 °C to 32 °C, and nighttime at 15 °C to 18 °C. This can promote rooting and speed up seedling growth. The problem to be paid attention to is that the time for raising the greenhouse temperature in the closed greenhouse should not be too long, generally 2 to 3 days is appropriate. 2 to 3 days after the new root was born, the slow seedling was completed. In particular, the vegetable seedlings ordered from the nursery factory require temperature control after 2 to 3 days. Otherwise, the environment with high temperature and high humidity in the shed causes the plants to grow in length, which makes the nutrition grow too much, the reproductive growth is inhibited, the flower buds are poorly differentiated, and the plants set fruit less. Retarded after cooling, low temperature seedlings. The implementation of low-temperature seedlings can effectively improve the resistance of seedlings. After 4 to 5 days of colonization, white roots were found in the planting hole, which indicated that the roots grew well and had passed the period of seedling sowing. The seedlings should be released at this time to promote the formation of strong trees. After easing the seedlings, ventilation should be promptly conducted. When the shed temperature is higher than 28°C, the air should be released. During the first day, the shed temperature is maintained at 25°C to 28°C, and at night at 15°C to 16°C. Afterwards, the temperature is gradually reduced until the daytime before flowering. 22 °C ~ 25 °C, night 12 °C ~ 14 °C, temperature difference maintained at 10 °C ~ 15 °C. Of course, it is also not possible to cool down excessively and prevent cold seedlings from growing cold. At a suitable temperature and a large temperature difference between day and night, plants grow robustly, with short internodes and well-developed root systems, which are conducive to fruit setting.
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