At present, during the peak season of vegetable production in greenhouses, it is a problem that many vegetable farmers are very concerned about how to ensure that vegetables are kept at a low temperature and meet the normal supply of the vegetable market. To this end, recently, the reporter specifically interviewed professors of the College of Horticulture and Forestry at Huazhong Agricultural University and vegetable experts.
Question: At present, what should we pay attention to in the management of vegetable gardens?
A: In winter and spring, the temperature is low and the insulation of greenhouses is the key.
Recommendation 1: Insulation with multiple layers of plastic film. That is, the greenhouse is covered with a middle shed, or a small shed is put on it, and a double-layer film or a three-layer film is used to cover the shed. Before the advent of rain and snow in open field, the surface should be covered with a thin layer of temporary insulation.
Recommendation two: Pay attention to the method and time of film coverage. If it is a sunny day, during the day, the cover in the plastic greenhouse or the middle shed should be removed to allow the vegetable crops to receive more sunlight, and the film should be covered after 4 pm. When covering the film inside the booth, it should be tightly covered without leaving gaps. When rain and snow weather is encountered, the middle shed or small shed film set inside the shed may not be opened. For the purpose of insulation, the northern end of the shed should be sealed (if necessary, such materials as straw draperies can be covered) and the entrance to the southern end of the shed can be opened. Operators can enter from the south end of the shed to avoid the adverse effects of the north wind.
Recommendation 3: Strengthen the management of seedlings indoors. January to February is the key period for spring greenhouse vegetable nursery. When the temperature is low, multiple layers can be used to cover and keep warm, avoid seedlings from freezing, properly control seedling growth, avoid leggy, low temperature and high humidity in the greenhouse. And damping-off diseases, etc., should be selected and controlled by appropriate agents.
Proposal 4: Build a greenhouse in advance to prepare for the cultivation of vegetable sheds in early spring. After early January, vegetables will be planted in the greenhouse in the early morning. Generally, greenhouses should be constructed more than 20 days in advance of planting to cover the membrane and increase the temperature and temperature in the shed to prepare for planting.
Q: For vegetables listed, what else do you have to remind farmers?
A: According to the characteristics of different vegetables and consumer demand for the proper arrangement of listed vegetables. During the holiday season, some consumers like to purchase vegetables with mud to resist storage, such as lotus root, radish, carrots and other root vegetables, after the harvest farmers can simply go to market. Vegetables, such as red cabbage and Chinese cabbage, do not need to be washed after harvesting. They can be brought to market after being bundled. Fresh leafy vegetables are listed after being washed.
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