How to grow spring cucumbers in the open field?

Generally, spring cucumbers in the open field are cultivated in greenhouses in advance. After the final frost, the ground temperature is stable above 65438 02℃ before planting. You can also cover a small arch shed with plastic film and plant it about 1 week in advance.

(1) Planting density If early-maturing varieties with short growth period are planted, the planting density of 45cm row spacing and 25cm plant spacing can be adopted, and 6000 plants can be planted every 667m; The planting density of mid-late maturity varieties with long growth period can be 80 cm long row spacing, 50 cm short row spacing and 25 cm plant spacing. Generally, about 4000 plants are planted every 667 meters, and one plant is built in two rows.

(2) Preparation before planting: After the land was thawed in the spring of that year, on the basis of deep ploughing and sufficient base fertilizer application in the autumn, base fertilizer was applied in the middle of the border or between two rows according to the planting row spacing, and 2,000 kilograms of decomposed organic fertilizer and 300 kilograms of cake fertilizer were applied every 667m2, and then ridges were formed on the fertilizing border or the border before planting.

(3) Planting method When planting spring cucumber in the open field, the air temperature and ground temperature are low, and the dark water planting method should be adopted. First of all, according to the plant spacing, open holes in the border or ridge, and pour planting water into the holes one by one. The amount of water should not be too large. After water permeates, place the seedlings and seal them. Cucumber planting should not be too deep, and it is advisable to keep the soil lump and the border flat.

(4) Field management ① Topdressing and irrigation. After 4 ~ 5 days of planting, cucumber seedlings began to grow new leaves after a delay. During this period, according to the soil moisture and weather conditions, water can be used to slow down the seedlings. When the ground surface is slightly dry, intertillage to raise the ground temperature in an emergency. From planting to planting, the word "control" should be emphasized in cultivation management, and more intertillage should be used to loosen the soil and less watering should be used to improve the growth environment of roots and promote root development, so as to achieve the goals of deep roots, Miao Zhuang, more flower buds and stable roots. When the root melons are harvested, the water supply will be increased. Generally, water is poured once every 5-7 days, once every 3-5 days, and fertilizer is applied once every other day. Apply 10- 15 kg ammonium sulfate or 5- 10 kg urea or 15 kg ternary compound fertilizer every 667 meters.

(2) Scaffolding pruning. Cucumber seedlings should be supported as soon as possible after planting. A 2-meter-long bamboo pole can build a large herringbone frame or four legs, each with 1 pole. When the cucumber is stretched, it begins to tie vines, and then every 3 ~ 4 leaves. Generally, a knot of 1 ~ 2 is tied under the melon, and the cucumber stem and bamboo pole are tied in the shape of "8", which requires moderate tightness and does not affect the later growth of cucumber. The pruning method of spring cucumber in the open field is to leave melons on the main vines and side vines, and remove the branches below the root melons in time. After the branches above the root melon see the melon, leave 1 ~ 2 leaves for coring. Old and diseased leaves at the lower part of the vine need to be removed in time. When the main vine grows to the top of the frame, generally 20-25 leaves, the top of the main vine is knocked off, and then it is allowed to grow freely until the seedlings are pulled out.

Prompt board

After the slow seedling of spring cucumber in the open field, if the soil moisture is good, the slow seedling watering can be postponed. If you need to water, don't use too much water, because it is early spring and the ground temperature is still low. Too much water will lead to low ground temperature, which is not conducive to the development of roots, and even easy to cause root retting.