(1) Selection of improved varieties: Solar greenhouses Winter cucumbers in winter and spring are at low temperatures in winter and light is weak, and there are severe weather such as continuous yin and wind and snow. Therefore, we must choose low-temperature, low-light, early-maturing, disease-resistant, and suitable grafted varieties. Suitable varieties include Jinchun 2, Jinchun 3, Jinchun 5, Lucu 4th, Nongda 12 and Nongda 14 and so on. (2) Cultivate strong seedlings: Solar greenhouses Cultivated cucumbers in winter and spring are mostly grafted for roots. The seedling bed soil requires high organic matter content, looseness, high fertilizer efficiency, and no pathogens. The proportions are: 60% (volume ratio) of cattle, horses, sheep, and pig manure with good quality and 40% of garden soil or field soil without cucumbers in 3 years. As a pollution-free cultivation, the preparation of bed soil is prohibited to use harmful municipal wastes and sludges, hospital wastes, and industrial waste containing harmful substances as organic fertilizer sources. The prepared bed soil should also be sterilized, preferably by high temperature sterilization, or by 40% formalin. The grafted cucumbers with black seed pumpkin as the rootstock were more than 2°C colder than the self-rooted cucumbers, the yield was increased by 20%, and they were immune to the wilt disease. The seedling index of the grafted seedlings at the time of colonization is 35 to 40 days of seedling age, 3 to 4 pieces of unfolded leaves, 10 to 15 cm in height, and dark green leaves. Disease-free. (3) Reapplying base fertilizer: cucumber grows for a long period of time in winter and spring, and has a large amount of growth, but weak root absorption. In addition, the temperature of the soil is low, and nutrients decompose slowly. Therefore, apply basic fertilizer. Base fertilizers should be used in general and concentrated facilities, generally 60% of the spread, 40% concentrated in the ridge. The amount of organic fertilizer per 666.7m2 is: 10000kg of high quality manure or 5000kg of chicken manure. At the same time, apply 50 kg of calcium phosphate or 20 kg of diammonium phosphate, and then apply potassium sulfate or potassium dihydrogen phosphate 10 kg. Planting pods are often planted in two rows of south and north ridges. Generally, double-layer buckle film is applied with 100-120cm wide film, while single-ridge or sorghum film is used with 60-80cm wide film. It is more convenient to use the first-placed deduction membrane method, and it is also possible to re-trench and then colonize the membrane. (4) Reasonable dense planting: The number of plants per 666.7 m2 was 3500-4000, and the temperature was selected to be warm and the weather was fine in the morning. (5) Strengthen the management after planting: The temperature management after planting should pay attention to three points: First, the closed insulation at the seedling stage; Second, increase the temperature difference between day and night, and promote root control; third is to strengthen the coverage and prevent the storm . The use of non-dropping membranes (such as pvc non-dropping membrane produced by the First Plastic General Factory of Jijiang Province, Jilin Province, with a light transmittance of over 75%) has been adopted, and measures have been taken to improve the light conditions of the solar greenhouses, such as cleaning the shed surface and hanging the reflective screen. In winter and spring cucumbers should be strictly controlled the number of watering, it is advisable to set up the sun pool to use submerged membrane submerged irrigation, preferably with drip irrigation. In general, the whole growing period is divided into 4 stages according to the number of watering: First, about 10 days in the initial stage of planting, requiring high soil moisture, absolute soil moisture content of more than 25%, taking into account insulation, should be planted with water, no drought, no water , In order to facilitate the growth of seedlings; Second, slow seedlings to 40 to 50 days in the early days of harvest, root control, can not irrigation, to maintain the absolute water content of about 20% of the soil; third, from the early harvest to the fruitful period, 70 ~ About 80 days, the water content should be above 23%, and the irrigation should be performed once every 10 to 15 days. Fourthly, when the plant is in a weakened period, the outside temperature rises rapidly. To prevent premature aging, the soil moisture content should be raised to more than 25%. Every 5 to 10 days irrigation water once. Top dressing should be controlled before promotion. The control of the melons before the main control, a small amount of fertilizer. When the root melon grows to about 10cm, it is combined with watering for every 666.7m2 to apply 10kg of ammonium sulfate or macerated bean cake 100kg; the melon period should be rich in fertilizer and should be applied less frequently. During the entire growth period, top dressing is about 10 times. In addition, depending on the plant growth, top-dressing can be properly performed to enhance plant resistance. In terms of fertilization, in order to prevent the pollution of cucumbers caused by fertilization, organic fertilizers and inorganic fertilizers containing phosphorus, potassium, calcium, and sulfur should be applied more, and nitrogen fertilizers should be reduced. In particular, the application of nitrate nitrogen fertilizers should be prohibited, so as to avoid excess nitrate in cucumbers. accumulation. Cucumber in winter and spring has little ventilation and often causes a serious shortage of carbon dioxide, affecting the normal photosynthesis. Therefore, carbon dioxide needs to be added. From the current local test results and production practices, the application of a concentration of 3000μL/L still has a large rate of increase, but taking into account the cost and other factors, with 1000 ~ 1500μL / L is appropriate. The application period is generally best with early application and early application. The application time is better after releasing the air, and the morning is better than the midday. Winter and spring cucumbers can be applied for 2 to 3 times during the whole growth period, each lasting 20 to 30 days. Other managements include using a sling as a support; removing old leaves and diseased leaves in a timely manner to make it airy and clear; removing excess flowers and tendrils; and timely picking the heart after the plants are full, using side branches and melons. China Agricultural Network Editor