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Small vegetable shed insulation cultivation
Amaranth is a perennial herb belonging to the genus Liliaceae, which is native to China and has a long history of cultivation. Leeks are served with tender leaves and flower moss, and pickled leeks and coriander roots are the specialty products of Yunnan. Leek is rich in nutrition and delicious in taste, and it is a kind of popular vegetable that most consumers like to eat. The leek has a wide adaptability and is both cold-resistant and heat-resistant. Its suitable temperature for growth is 13°C to 20°C. It is of good quality in cold climates and can grow normally at 25°C to 30°C, but it has many fibers. Decline in quality. Spring and autumn leeks in Kunming and Yuzhong have good quality and high yield. In the summer, the main collection is moss and silk flowers. If not, the leeks grow fast but they are of poor quality and have a lot of diseases and insect pests. As the saying goes, "Seven odors are dead like a dead dog in July." In winter, when the temperature is lower than 10°C, the growth is extremely slow, and below 6°C to 7°C, the leaves will also be dry and yellow. Therefore, in the middle of December and February of the following year, the plastic canopy can be used for thermal insulation Cultivation. Its advantages: First, it can be used to increase the output and benefits of the morning market. For example, open cultivation can only take 2 or 3 times in the whole winter, and small arch shelters can take 4 to 5 times. Second, the winter and spring drought, open field cultivation of large amounts of water, small arch shed cultivation of moisturizing moisture conservation and labor. Third, the investment in small arch shelters is small and it is convenient to remove them. Although greenhouses can also be cultivated, the investment is large and the temperature in summer is high, which is unfavorable to the growth of leeks. The main cultivation techniques First, the appropriate area and season Where the average monthly temperature in winter is less than 10 °C in the area can be a small arch insulation cultivation. Varieties can use existing cultivars, can also be used in Shaanxi Hanzhong winter wolfberry or Henan 791, Tianjin yellow seedlings and other varieties. Second, the time for building sheds is optional from late November to early December. The leeks can be selected on lands with sunny leewards, convenient irrigation and drainage, and a width of 1 to 2 meters. If the maggots span more than 2 meters, the spans are too large. If the rain and snow fall in winter and spring, it is easy to collapse. Before the construction of the shed, it can be harvested. After the wound is healed, loose soil is applied to topdressing. Third, the temperature and humidity management In late November to early December, the temperature in the noon greenhouse is high. When the temperature exceeds 20°C, ventilation and cooling should be taken to keep the temperature below 20°C and at night above 10°C. High altitude and northern areas in the cold flow and the intensity of low temperature should also be in the greenhouse with a small shed or in a small shed covered with mats and other cover cold. In late March, as the temperature rises, the ventilation time can be extended during the day, or only the roof can be opened on both sides. If the temperature is stable above 15°C, the film and arches can be removed. Leeks have strict requirements for water, and they are not tolerant to drought and can not tolerate drought. Generally, the soil moisture content is maintained at 70% to 90%, and the suitable humidity is 60% to 70%. IV. Fertilizer and Water Management Before the shed has been applied fertilizer, mainly irrigation, 7 to 10 days once, to keep the soil moist, after each harvest, chase application of human urine 1500 kg/mu or compound fertilizer 15 to 20 kg/mu Urea 8 ~ 10 kg / acre, combined with irrigation and fertilization. Diseases and pests of leek mainly include gray mold, sclerotinia, cockroach, beet armyworm, etc., and should be promptly controlled.