Current low temperature and rainy weather must strengthen vegetable field management

The recent low temperatures will continue to be mainly cloudy and rainy weather, which will adversely affect vegetable production and spring nursery management. For this reason, the following vegetable production management measures are recommended:

1. The greenhouse protects the wet. Three-film covering method can be adopted, that is, adopting a small arch shed in a greenhouse, covering the film at night, or covering the film on the film, insulation and dehumidification. At the bottom of the shed, a plastic film is used as an apron to reduce the cold air at the bottom; to plug gaps and minimize heat dissipation in the gap; in the north of the greenhouse, straw is used as a windbreak to prevent wind and cold. Conditions can take the heating wire heating, candles, smoke, fill light and other emergency measures. In order to increase light, adjust air humidity. While doing a good job of cold protection, it is necessary to timely remove the coverings on the small arch sheds and provide timely and small ventilation.

2. Follow-up replay. If the seedlings are frozen and the disease is serious, they must be promptly replanted after the weather turns fine.

3, clear the ditch. Timely dredge and deepen the channel to eliminate the stagnant water as soon as possible to ensure the normal growth of vegetables.

4, root fertilization. Grab sunny and timely topdressing to improve plant resilience. Topdressing with quick-acting nitrogen fertilizers and decomposed organic fertilizers should be considered as appropriate. Can also use 0.2% urea solution, 0.2% -0.3% potassium dihydrogen phosphate solution and other foliar spray for spraying, in order to promote the plant as soon as possible to restore normal growth and development.

5, add carbon dioxide. Pay attention to adjust the air in the booth. In the cold season, due to the low temperature and low ventilation and ventilation, the sheds are almost in a closed state. Therefore, it is easy to cause excess oxygen in the air and insufficient carbon dioxide, which has a great influence on the respiration of vegetable plants. Can use carbon dioxide fertilization technology, such as the use of sulfuric acid and ammonium bicarbonate reaction (using carbon dioxide fertilizer device), to adjust the indoor air composition, supplement carbon dioxide content, but also enhance the cold resistance of vegetable plants.

6, smoke gray mold and other diseases. At present, vegetables in greenhouses have weak growth and poor resilience, and they are prone to diseases such as gray mold, and prevention and control work must be done. A smoke-curing agent "A smoked II" can be used, 3-4 pieces of each standard greenhouse (6 meters 30 meters), smoked in the greenhouse in the evening, the drying point at the dry end, the greenhouse to be sealed, the next morning Ventilation, smoking is strictly prohibited when anyone enters the greenhouse to prevent poisoning accidents. In addition to the prevention and control of the above-mentioned pesticides, they must be administered once before planting in the field. If there is no disease or illness after colonization, they can be prevented once in 7-10 days, and once in 5-7 days if the disease is heavy, For the selection of pharmaceuticals, the current rainy days are better with fumigants. If the weather turns clear, the following agents can be used: 50% chloroquine 1500 times, 50% fast cyclin 2000 times, and 75% chlorothalonil 800 times.

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[Package Dimension] 10cm×12cm 2pieces/box
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[Attention]
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[Storage Conditions]
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