Early spring sowing vegetables are mainly cultivated in large and medium sheds, and it is particularly important to master key cultivation techniques. First, seed processing options Quality varieties of vegetables, soaking, germination treatment. (1) Soaking: Soak seeds in warm water of 55-60°C for 15 minutes, stir continuously, and soak seeds in water of 28-30°C for about 6 hours. (2) Germination: Soak good seeds with a damp cloth, keep the temperature at 25-30°C during the day and 18-20°C at night, and select 80% of the seeds for whitening and sunny sowing. Second, sowing, nursery 1, sowing watermelon best rush in mid-February before the electric hot sowing; melon, pumpkin, cucumber, melon, bitter gourd, loofah and other elections 2. Seedling management: (1) bed soil should be disinfected before preparation for sowing, commonly used in the production of five generations of mixture, Wufu mixture or mixed seedlings plus Fumei double equal amount of mixed disinfection, the amount of soil per cubic meter of soil 50 -80g, can prevent seedling stage damping-off, blight. The seedbed should be poured with water. (2) The seedbed management shall be covered with a layer of fine soil and mulch film after sowing, and a small arch shed shall be set up to cover the grass curtain to prevent cold. The temperature inside the booth is maintained at 20-25 °C. In the shed, more light should be seen, and the soil moisture should be suitable. Attention should be paid to ventilation, disease prevention, and rapid seedling emergence and emergence. (3) When seedlings with 1-2 true leaves, they should be timely transplanted to the nutrition seedlings, and pay attention to maintain the temperature and humidity in the shed, and cultivate strong seedlings. Third, field management 1. The fertilizer and water management shall be controlled by easing the seedlings and then pouring a sapling seedling water, and the seedling fertilizer shall be added in combination with watering. The diluted manure water shall be 500-700kg per mu. After flowering and fruit setting, topdressing once-expanded melon fertilizer is applied, and 20 kg of urea or 15 kg of ammonium phosphate is applied per mu. After entering the harvest period, it is often necessary to top-dress fertilizer and watering, generally requiring harvesting once, top-dressing once, and pouring water once a week. Into the full fruit period, heavy fertilizers should be topped and watered once every 3-4 days. 2, plant adjustment due to melon vegetable melons are mainly dependent on the main vine, can be a single vine or double vine-type whole vine. The single-leaf method leaves only the main vine, all the vines are removed; in addition to the main vines, the double vine style also leaves a vigorously growing vine, and all other side vines are removed. 3, artificial pollination In order to improve the fruit setting rate and the number of individual plants, artificial pollination should be preferred. The pollination time should be selected at about 9:00 am on sunny days. IV. Pest Control 1. Seedling disease at the seedling stage Diseases that often occur at the seedling stage are damping-off and blight. Control methods: The main cultivation and management, supplemented by pharmaceutical protection. 1 Strengthen seedbed management. According to the soil to be disinfected, the fertilizer should be decomposed, the planting should not be too dense, the cover soil should not be thick, and the principle of proper temperature and humidity should be used to manage the seedbed. 2 chemical control. The beginning of the disease when the application of pesticides, and timely removal of diseased plants. The agent can be used 75% chlorothalonil wettable powder 600 times, or 70% mancozeb WP 500 times, selected in the morning application. When a large number of underground pests such as cockroaches and cockroaches occur at the seedling stage, serious damage to the seedlings occurs. Prevention and control measures: Use 80% of dichlorvos EC 1000 times to irrigate the soil surface of the seedbed to prevent lice. Use 80% dichlorvos EC 100 times solution or 50% phoxim 50 times solution, mix and grind the bean curd to make the bait. Spread it on the soil surface of the seedbed to kill it. 2. Production of major pest and disease control Anthracnose: Use 70% mancozeb 400 times liquid and 75% chlorothalonil wettable powder 500 times alternately. Botrytis cinerea: can be treated alternately with 500mg of clotrimazole or 1000 times of 50% fast keratin. Downy mildew: Use 72.2% Prokary 1000x or 40% Ethylphosphine Aluminum 4000x for alternate control. Powdery mildew: 15% of powder rust 1000 times or 75% chlorothalonil 600 times alternately control. Fusarium wilt: Can be treated with 50% carbendazim 500 times solution or 70% thiophanate-methyl root irrigation, 250ml per plant. Root tuberculosis: root tubercle disease occurs in the field. Chemicals can be used to control the use of pentachloronitrobenzene WP 1.5-2 kg per acre, or watering quintoline 700-1000 times, per hole 0.25-0.5 kg. Huang Shougua: 1 Catch the topsoil near the melon root and prevent adults from spawning. 2 Sprinkle lime, sawnwood, and fire and earth ash on the leaves to reduce adult damage. 3 to catch the seedlings with 48% of Loxen 1000 times or 90% dipterex 1000 times to control the adult, control larvae can be used 90% trichlorfon 1000-1500 times liquid irrigation. Root knot nematodes: 50% phoxim 1500 times or 80% dichlorvos 1000 times or 90% trichlorfon 800 times, with 0.25-0.5 kg per strain . Milk Booster,Breast Milk Booster,Milk Booster Supplement,Milk Production Boosters Tangshan Finely Animal Care Co.,Ltd , https://www.faczyme.com