Pollution-free cultivation technique of winter melon in greenhouse in early spring

First, early spring

㈠ Choose the right variety. Use early-maturing, high-yield, high-quality, strong disease resistance, small commercial melon varieties, such as Beijing bunch of winter melon, Beijing very early maturity small winter melon, single melon weighing 2-3 kg.

㈡ raise seedlings. In early February, improved impotence was used to raise seedlings in a nutrition bowl in a greenhouse. Nutrient soil was prepared with 6 parts of sterile sandy loam soil and 4 parts of rotten high-quality loop fertilizer. Add 2-3 kilograms of ternary compound fertilizer and 100 grams of 50% carbendazim wettable powder to each cubic meter of nutrient soil. The compound fertilizer and carbendazim are mixed into an aqueous solution and sprayed on the prepared nutrient soil to mix thoroughly. Soak seeds to promote germination. Place one seed flat in each bowl and cover the soil with 1.5-2 cm. After sowing, the temperature in the shed should be maintained at 25 ° C-28 ° C during the day and 15 ° C-18 ° C at night; after the emergence, the temperature should be appropriately reduced to maintain 23 ° C-25 ° C during the day and 12 ° -16 ° C at night. After the true leaves grow, foliar application of sugar nitrogen solution (0.2% sucrose + 0.2% urea), or 0.2% potassium dihydrogen phosphate and urea mixed solution. The seedlings are about 30 days old and colonized at 3-4 leaves. 7-10 days before planting, let the seeds air.

㈢ Fertilize the ground. Dig a trench with a width of 1 meter and a depth of 0.5 meter in the greenhouse with a trench distance of 3 meters. 4000 kilograms of rotten chicken manure, 50 kilograms of ternary compound fertilizer, 100 kilograms of superphosphate, 50 kilograms of potassium sulfate, 60 kilograms of bean cake or cotton seed cake are applied in the ditch.

㈣ Transplantation. In early March, two rows of winter melon were planted in each ditch, with a row spacing of 0.5 meters, a plant spacing of 0.5 meters, and a large row spacing of 3 meters between the two trenches. After planting, cover the mulch, set up a small arch shed, and cover the grass hoe on the small arch shed at night.

㈤ Strengthen management. Pruning using the three-vine pruning method. Remove the * female flowers, and collect the male flowers to artificially pollinate the female flowers when the second and third female flowers are open, or use 20-30 mg / kg of 2,4-D or 30-50 mg / kg of antiprotocol plus 50 mg / kg of The gibberellin mixed solution is dipped in flowers and smeared on the ovary, and 500-fold carbendazim can be added for disease prevention. Leave 1-2 melons per plant. After sitting, topdress and water in time, and add carbon dioxide gas fertilizer.

㈥ Harvest. In mid-late April, the first stubble can be harvested when it grows to 1-1.5 kg. * After harvesting, cut vines at 20-50 cm at the base of the plant. Membrane-breaking and deep-farming fertilization, 20 kg of urea per acre and 20 kg of ternary compound fertilizer. After re-spreading, keep 3 vines and 1-2 melons per plant. The second winter melon was harvested and marketed in late June.

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