Wintering cucumber topdressing and releasing technology

Topdressing management overwintering cucumbers and melons for 4 to 5 months, the total amount of fertilizer needed must be more, but the amount of fertilizer should not be too large each time, because pumpkin roots have stronger ability to absorb fertilizer than cucumber roots, and absorb fertilizer The range is wide, so the amount of fertilizer needs to be increased, but the fertilization is more likely to cause the stems and leaves to grow longer. During a large period of winter, the growth of cucumber is not large, and it is impossible to water more. When the amount of topdressing is large, it is easy to cause excessive soil concentration and form concentration barrier.
The topdressing of wintering cucumbers is carried out according to the following rules: after picking the first melon, chasing a fertilizer, using 15 to 20 kg of ammonium sulfate; in the low temperature period, generally 15 days to chase the fertilizer, each time chasing ammonium sulfate 10 to 15 kg In the severe winter season, special attention should be paid to the foliar topdressing. Foliar spray fertilizer should not be too frequent, otherwise it will cause phytotoxicity and fertilizer damage. After the spring season, the time of top dressing should be gradually shortened, and the amount of topdressing should be gradually increased. Large, 15-20 kg per urea per acre; after the peak period of the melon, the plants begin to age, and the topdressing and watering should be reduced to promote the return of the stem and leaf nutrients to the roots, so that the roots can be restored to extend the knot. Melon period.
The greenhouse should be closed for a period of time after the release of the wind management to ensure the humidity, increase the temperature, and promote the slow seedling; after the slow seedling, the wind should be released according to the need to adjust the temperature and exchange gas. But as the weather gets colder, the wind will gradually decrease. In the winter, when indoor humidity, harmful gases, and temperature adjustment are excluded, it is also necessary to release air. However, when the outside temperature is low in winter, when the cold wind blows directly onto the plant or the amount of air is too large, the cucumber is easily damaged by cold damage or even freezing. Therefore, in the winter, the wind is generally only open to the upper air outlet, and the air temperature should be checked frequently to prevent the temperature from falling too low.
The weather in the spring is getting warmer, the temperature is getting higher and higher, and the accumulation of harmful gases in the room will be more and more. In order to adjust the temperature and air exchange, the ventilation volume should be gradually increased. Ventilation in the spring must be combined with anti-cucumber downy mildew. First of all, it can only be ventilated from the height of the greenhouse (in principle, not less than 1.7 m), and the bottom wind can not be placed. The damaged mouth of the shed film should be repaired at any time. When it rains, the venting opening should be closed immediately to prevent the entry of the downy mildew spores. indoor. In addition, the high temperature exceeding 32 °C has the effect of inhibiting the spore germination of downy mildew, which is also a problem to be considered when releasing the wind. When the night temperature is stable at 14 to 16 ° C, the wind can be released overnight, but it is necessary to prevent rain. Enter indoors. The cucumber in the solar greenhouse has been grown under the cover. Once the plastic film is removed, the production is over.

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Lamp Body Material:PMMA optic fiber Light Source:LED
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