Early spring culture of green soybean
In early spring, the cultivation of protected soybeans in soybeans was launched early, the price was high, and the benefits were significant. They were welcomed by growers and the planting area expanded rapidly. There are two main cultivation methods in protected land cultivation, namely greenhouse + small arch shed + plastic film and small arch shed + plastic film cultivation. Compared with open field cultivation (covered plastic film), the protected cultivation has the following advantages: 1 good heat preservation, because the air temperature and soil temperature in the protected area rise early, the sowing period and harvesting period are earlier, and the general sowing date is 15 to 20 days earlier. Early 10 to 15 days, the output value is also high; 2 temperature difference, due to the protection of sunny days warming during the daytime shed, cooling at night is also fast, beneficial to the early spring soybean accumulation of nutrients; 3 light disease, the growth period covered with thin film, play to avoid The role of rain, reduce the occurrence of diseases, improve the commercial properties of soybean meal.
In the early spring, the protected cultivation technique of green soybeans is basically the same as that of open cultivation (film mulching), but the following points must be noted:
(1) Variety selection. In order to promote early cultivation of protected soybean plots in early spring, we should choose soybean varieties with strong cold resistance, compact plant type and short growth period. At present, there are 292, Qingsu 2 and Qingsu 1 and other early maturing varieties in Ningbo.
(2) sowing seedlings. In early spring, protected soybeans in the protected area are preferably transplanted with seedlings and transplanted. Generally, greenhouses, small sheds and plastic mulching are used for planting in the middle and late January. Small sheds and plastic film mulching are planted in mid-February.
(3) Doing earthwork. In order to reduce the groundwater level in the shed, small sorghum should be used for site preparation. That is, the width of the surface is 100 to 110 cm, the depth of the groove is 20 to 25 cm, and the width of the groove is about 20 cm.
(4) Properly dense planting. The protected cultivars are mostly compact early maturing cultivars, and the plants are relatively short, so they must be closely planted. Generally, 3 plants per hole, 7000 to 8000 holes per acre, and 20,000 to 24,000 basic plants, a row spacing of 35 cm, and plant spacing of 24 to 27 cm.
(5) Temperature and humidity management. 3 to 5 days after planting, no ventilation, so as to facilitate heat preservation and moisturizing, promote seedlings. After easing the seedlings, the sunny days are properly cooled and the seedling temperature is controlled at 23-25°C during the day, at 17-23°C at night, and the relative humidity is about 75%. With the growth and development of seedlings, greenhouses (arch sheds) should gradually extend ventilation time and increase ventilation. Before mid-March, greenhouses + small sheds + plastic film cover cultivation, small sheds in greenhouses uncovered the night cover, sunny noon can be shaken side membrane ventilation; small arch shed + mulching film cultivation, mainly in small arched sheds ventilation. The temperature rises in late March, and the small shed in the greenhouse can be removed as appropriate. If the greenhouse is covered with small sheds and mulching, except for two ventilations, an air vent shall be opened every 10 meters or so. If there is no strong cold air, the ventilation may not be closed at night. mouth. After mid-April, the film on both sides of the greenhouse was shaken off, and a small shed could be used to remove the film.
(6) Strengthen fertilizer and water management. Early-spring cultivated soybeans planted in protected areas are relatively short in plant type and difficult to grow long. They should apply 10 kg of available nitrogen fertilizer+5 kg of compound fertilizer per acre at the beginning of flowering period, and apply 0.2% to 0.3% of foliar spray at the stage of scab and grain. % Potassium Dihydrogen Phosphate + 0.5% urea 2 times, can effectively increase the number of pods and promote the expansion of grains. In the early stage, watering is generally not required, and attention should be paid to field drainage, water requirement during flowering and podging, and irrigation according to weather and soil moisture to keep the soil moist.
The way that you kit-out your greenhouse is what will really make it work well for you. The most basic is the Frame and Area - put simply the more surface area and using life of Frame and Area you have, then the more accessories you can fit into your greenhouse and therefore the more capacity you have. Other accessories such as Galvanized Steel Pipes, Greenhouse Film Electric Roll Up and Film Manual Roll Up, Greenhouse Wiggle Wire and Lock Channel , Greenhouse Support Line and Mulch Film ,Ventilation and Sun-Shading Systems can complete your setup.
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