When is it good to plant cucumber in small arch shed in spring and early maturity?

When should early-maturing cucumber be planted in spring in small arch shed? how to make it slow and grow quickly? the suitable planting period for early-maturing cucumber in small arch shed with plastic film is late March. The slow speed and growth of cucumber seedlings after planting are the result of many environmental factors, the most important of which is the growth of root system. In fact, whenever we observe the aboveground growth state, we should first think about the root development, some symptoms are shown in the aboveground crown, but the root of the problem lies in the underground roots. Therefore, in order to achieve the goal of slow seedling and prosperous growth, we must first protect the root system in the process of planting and reduce the damage of root system as much as possible. After planting, various measures were taken to promote root growth, root system was exuberant, and aboveground stems and leaves were naturally vigorous. For this reason, the following measures should be taken: (1) hoarding seedlings: the time of hoarding seedlings mainly depends on the soil quality of the seedling bed, the sandy loam soil dries quickly, the hoarding time should be shorter, the clay soil dries slowly, the hoarding time can be longer, and the suitable hoarding time is 5-7 days. When preparing the cultivated soil, not only the fertility but also the texture of the cultivated soil should be taken into account, and the loam should be more heavy. (2) Baking the bed in advance: the planting bed should be baked in the shed about 10 days in advance to increase the ground temperature. (3) stable seedlings in dark water: in late March, choose the cold tail, warm head, sunny and windless morning to plant. Dig holes according to the required plant spacing. Such as precocious cultivation in a small arch shed, the row spacing is 60 cm and the plant spacing is 25 cm. The depth of the hole is 12cm to 13cm, so that the original soil block can be flush with the surface after planting. Water first and then put the seedling tuo, but you must not wait for the water in the hole to ooze to dry the back seat Miaotuo. It is required that when the water seeps through the acupoint, the Miaotuo has been completely wet through. If it is not soaked, some water should be irrigated appropriately. Planting should not be too deep. The agricultural proverb says, "eggplant has no neck, cucumber is dewy," which means that cucumbers are required to be planted shallowly, because cucumbers have shallow roots, and the shallow roots develop well, and the temperature of the shallow soil is higher than that of the deep layers, which is beneficial to the development of roots. (4) strict covering film: after planting, cover the film strictly before the slow seedling, increase the air temperature and ground temperature, and promote the growth of the whole seedling. In case of high temperature during the day, cover the grass to cover the shade to prevent the seedlings from wilting. In general, it is not ventilated. (5) Intermediate ploughing and loosening soil: ploughing in time after slowing seedlings, watering a little water after interploughing according to the growth of seedlings and the degree of dryness and wetness of the soil, and then ploughing twice in a row, each time the depth of intertillage can reach 710 centimeters, and it should be delimited between rows and plants, but no matter how intertillage is done, do not damage the seedling soil during planting. Mid-tillage can increase soil temperature and soil permeability, which is beneficial to root growth. (6) rational management of border temperature: after slowing down seedlings, the border temperature was properly ventilated in daytime, 20-25 ℃ in daytime and 15 ℃ at night. In the middle of April, if the daytime temperature reaches more than 20 ℃, you can uncover all the plastic film so that it can receive natural light. Cover the film around 4 pm and cover part of the grass to prevent the wind from blowing the film away. In the first ten days of May, when the night temperature is stable above 15 ℃, the film and grass will be removed.