First, choose good breeds to cultivate strong seedlings. The results of the selection of improved varieties showed that: "Bitter Bitter Gourd" and "Bengku bitter gourd" were adapted to early cold cultivation in plastic greenhouses in cold regions of the North. The white bitter gourd plants grow strong, branch vines are slender, and the toughness is strong. The melons are spindle-shaped and the melons are light green at first, gradually turning greenish white, 18--30 cm long, 5 cm in transverse diameter, and 0.8 cm in meat thickness. Bar-shaped and irregular knob-like convex, white-green, shiny, tender and tender, moderate bitterness, good quality, high yield, strong adaptability. The single melon weighs 100--200 grams, and the output of 1.5 acres is 2500-3000 kg. Penang bitter gourd plants grow strong and strong branches. The fruit is long conical. The melon grows about 20 centimeters long and has a shoulder width of 8 centimeters. The surface has neat rows of grooves, stripes and knobby knobs. Melon green and shiny, melon meat texture is fine, bitter taste, good adaptability, strong resistance. The weight of a single melon is about 400 grams, and 1.5 acres can produce 2000 kilograms. 2. Soaking Seed soaking in early March soaking seeds in water at 55°C for 30 minutes, stirring constantly, then soaking for 12 hours at room temperature. After the seeds are removed, they are drained, cleaned with a wet towel, germinated under 30-degree conditions, and washed with water at about 25 degrees for 1 to 2 times a day. Generally 2 to 4 days, buds can be out. 3. Sowing the local greenhouse nursery. The budding seeds were sown in a plastic nutrient bowl filled with nutritious soil, covering the soil 2.5 to 3 centimeters; the nutrient soil was prepared as a composting organic fertilizer and a cereal crop field soil ratio of 2:8, and the addition was added in every cubic meter of nutrient soil. Diammonium phosphate 2 kg. The pre-emergence temperature was controlled at 28-30 degrees, and the temperature was controlled at 25 degrees after emergence and 15 degrees at night. At the same time keep the nutritious soil moist and not dry. The seedling age is controlled in 40 to 45 days, and 4 to 5 true leaves are planted when they are unfolded. Second, early sheds, site preparation, timely planting 1. As soon as the shed is shed, the ground will be roasted on the ground in mid-March to improve the ground temperature. During the site preparation, 5000 kg of organic fertilizer was applied per mu, 20 kg of diammonium phosphate, and 20 kg of urea. Then, they were turned to the ground, and they were weighed 60 cm. 2. Timely Planting Around April 20th, 4 to 5 true leaves of the seedlings were planted on sunny weather with a spacing of 40 cm. Plant water when planting. Third, to strengthen the management of timely harvesting After planting until scaffolding, in order to prevent cold damage in early spring, you can take a small secondary arch cover. The daytime temperature is controlled at 25-28 degrees and the nighttime temperature is controlled at 15-17 degrees. According to the growing condition of the plants, soil water conditions, appropriate irrigation, keep the soil moist and avoid flooding. Make full use of the cultivator before the time frame to cultivator 2 or 3 times, when the extension of vines in a timely manner, timely binding of vines on the shelves. Extend the vine when the first topdressing, top 10 kg of DAP per acre, timely recovery after chase; the first time when the melon seated for the second time dressing, chase 15 kg of ammonium phosphate per acre, timely recovery after chase. In order to concentrate nutrients, some bottom side vines may be properly removed to promote early maturation. From 12 to 15 days after flowering, the strips or knobs of the melon strips are distinct and glossy, and when the color of the top ends becomes light, they can be harvested as merchandise. The bitter gourd is very short from commercial maturity to physiological maturity. Therefore, timely harvesting is required to ensure quality and prevent excessive ripeness.
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