The delayed cultivation of cucumbers in greenhouses can bring cucumbers to market in off-season vegetables. The output per mu can reach 4500 kg and the output value can be more than 7,000 yuan. Social and economic benefits are significant. The technology is described as follows: First, select the appropriate varieties of greenhouse delayed cultivation of cucumber in the early stage of growth, high temperature and rainy, late low temperature and cold, therefore, should choose the seedling stage heat resistant, strong growth potential, disease resistance, high yield of cucumber varieties, For example, Jinyan No. 4, Qiutang No. 1, Luqiu No. 1, Luchun No. 32, and Jinza No. 2 etc. Second, nurturing strong seedlings in greenhouses to delay the cultivation of cucumber, sowing time from late July to mid-August is appropriate. Take a arbor in the greenhouse or cover the seedlings with a shade net. The width is 1 to 1.2 meters and the length is about 6 meters. After spreading 3000 kg of decomposed manure per acre, turn the soil 10 centimeters deep to fully mix the soil and fertilizer. Then, flatten the surface, press 10 cm 10 cm row spacing, place 2 seeds in the center of each square, cover 2 cm thick nutritious soil, lightly step on it and then fill with water. After the emergence of the seedlings, keep them dry and wet; if the leaves are dry, water should be poured in the morning and early evening. When two true leaves appeared in seedlings, they were treated with 100 ppm ethylene for 1 time. 20 days after sowing, when the seedlings have 3 true leaves, they can be planted. 3. Before planting the crops after planting, 3,000 kg of high-quality rotizing fertilizer, 100 kg of superphosphate, and 50 kg of plant ash should be used as base fertilizer per acre, and 15 kg of 50% carbendazim powder should be sprayed on each acre to disinfect the soil and then watered. When the soil is dry and wet, it is turned to the ground. After the flattening, the ridges with a height of 10 cm and a width of 80 cm are formed, and the large ridges with a width of 40 cm are opened between the two large ridges. In each big ridge, a small ditch with a width of 20 cm was opened to form two small ridges 30 cm wide and 10 cm high. At the time of colonization, a row of cucumber seedlings was planted on each small ridge with a plant spacing of about 20 cm and 4,500 to 5,000 plants were transplanted per acre. Fourth, strengthen the management after planting 1. Adjust the temperature and humidity before the melon period (from late July to mid-September), only to keep the plastic film covering the top of the greenhouse, and uncover the plastic film around the greenhouse, this will not only reduce the direct light Strength, but also play a role in cooling and rain. In addition to rain, the usual ventilation should be strengthened so that the temperature inside the shed can be maintained at 25-28°C during the day and 13-17°C during the night. The temperature difference between day and night is above 10°C. Keep vents wet at night. During the period from the mid-September to mid-October period, the temperature in the shed remains 25 to 28°C. However, when the outside temperature drops rapidly in mid-October, it is necessary to make full use of the fine weather so that the daytime temperature in the shed can be increased to 26 to 30°C, and thermal insulation measures can be used to achieve 13 to 15°C at night. In this period, if the daytime temperature is suitable, ventilation should be strengthened; when the minimum temperature is lower than 13°C, the ventilation openings should be closed at night. During the later period (from late October to late Lahu), the outside temperature dropped sharply. In this period, the film around the greenhouse and on the roof should be tightly sealed and kept warm. Every day during the day to delay the release of time to increase the temperature inside the shed; at night to take insulation measures. When the lowest temperature in the shed fell to 10°C, the brackets could be removed and the stems of the cucumbers could be dropped. Then the sheds were insulated. 2. Fertilizer Management After the autumn delay of cucumber colonization, the topsoil sees a wet seedling when it is dry and wet. The results were dominated before the results, requiring less irrigation. Before the insertion rack can be applied once a fertilizer, Mushi manure 500 kilograms of manure. After irrigation, irrigation racks are inserted. Into the melon period, fertilizer and water should be sufficient, generally need to topdressing 2 or 3 times, each applying 10 kg of urea or 500 to 750 kg of decomposed human waste. In combination with spraying, 0.2% urea solution and 0.2% potassium dihydrogen phosphate solution can be sprayed. When the temperature is high, water is poured every 4 days. When the temperature is low, water is poured every 5 to 6 days. After the end of October, water is poured every 7-8 days. 3. The cultivator loose soil and topping topping from the colonization to the sitting melon, generally cultivating loose soil 3 times to loosen the soil and promote root development. Late autumn cucumber can use its side vines to increase late yield, generally leaving 2 leaves and 1 melon on side vines. When the plant grows to 25 leaves, it must be topped and tossed in time to promote the growth of "returning melon." 4. Prevention and treatment of diseases and insect pests in late autumn Cucumber prone to downy mildew, powdery mildew, aphids and other pests and diseases, if it is found to be timely spraying control. In addition, we must strictly regulate the temperature and humidity in the greenhouse. Excerpt from: Ainong.com
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