Overwintering cucumber seedlings

Overwintering and picking cucumbers refers to the sowing of cucumbers in the greenhouse, sowing in the fall and harvesting in the winter, and ending in the late spring and early summer of the second year. It is also known as a wintering scorpion, or "spring and spring scorpion." Overwintering and picking cucumber production experience the worst sunshine year in the year, the lowest temperature season, the technical difficulty is greater, the requirements are more stringent, but the best economic benefits.
First, the basic conditions for production The use of solar greenhouses for wintering, cucumber production is based on no warming or no warming (limited temporary warming), therefore, the construction and management of the greenhouse is strict. Regardless of the structure of the energy-efficient solar greenhouse, the temperature must meet the most basic needs of cucumber growth during the severe winter season. Under normal management, the minimum temperature in the greenhouse should not be lower than 8°C. In regions with poor high-cold and sunshine conditions, temporary temperature compensation measures can be taken to ensure that the indoor temperature reaches the limit or slightly higher than 1 °C ~ 2 °C.
Second, the varieties of winter cucumbers are currently used grafted seedlings, which require strict scion varieties, to be normal under low temperature and low light fruiting melon; also high temperature and humidity, high temperature and high humidity conditions fruiting ability, In addition, we must also have good disease resistance and strong adaptability to the greenhouse environment. At present, our products are more commonly used in the production of the thorns, including Changchun Mimosa, Xintai M., and Shandong M., which I have cultivated. No. 1, No. 2, Beijing 102, Tianjin Green No. 3 and so on.
Third, sowing time overwintering cucumber seedlings generally about 35 days, about 35 days after planting began harvesting, from sowing to harvest takes about 70 days. Overwintering cucumbers generally require harvesting before and after New Year's Day to enter the peak of production before and after the Spring Festival. From this calculation, the normal sowing date should be from early to mid-October. The sowing of this period is conducive to the healing of graft wounds and the establishment of a high yield shelf before the arrival of severe winter. In order to increase the pre-winter yield and reduce the risk of overwintering, the sowing date can also be appropriately advanced.
4. Grafting seedlings Cultivate overwintering cucumber seedlings, usually in a greenhouse. In general, cucumber seeds should be sown for 5 to 7 days. The cotyledon of the pumpkin is flattened until the first half of the true leaf is unfolded, and the two leaves of the cucumber are grafted for the appropriate period. When the black seed pumpkin is too hollow, it will affect the survival rate of grafting. At present, overwintering and picking of cucumbers depends on the use of docking methods. There are three ways to connect seedlings: first, cucumbers and black-seeded squashes are sown and nursed; when they are grafted, seedlings are separately explanted, followed by another planting; In the sand bed sown with cucumber seeds, black seed pumpkins are germinated and then seeded into the nutrition bowl (centered position). Only cucumber seedlings are excavated during grafting, and then the roots of the cucumber seedlings are planted on the side of the nutrient bowl. , Into the seedbed for cultivation, according to the situation of moving seedlings to manage the seedlings, the seedlings when transplanting convenient handling, not easy to hurt the root; The third method is to directly seed the pumpkin seeds in the ridge, grafting cucumber seedlings, then The roots of the cucumber seedlings were then planted on one side of the ridge. These three methods have their advantages and disadvantages, but the latter two methods use slow seedlings, but require skilled grafting techniques to ensure the survival rate of grafting. The first three days after grafting should maintain a temperature of 25°C to 30°C and a humidity of 90% to 95%. Afterwards, the temperature and humidity should be gradually reduced. After careful management, 10-15 cm in height, 0.6-0.7 cm in thickness, and 4 leaves in one heart can be cultivated. , Seedling age 35 to 40 days of robust seedlings.

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