Cultivation season: Greenhouse cultivation can basically produce and supply year-round. In order to obtain higher economic benefits, sowing should be arranged from October to December. Land preparation and fertilization: Water spinach has a fast growth rate, strong branching ability, and requires more fertilizer and water. It is recommended to apply sufficient base fertilizer when planting. Temperature and humidity management: Insulation and cold protection are the key to off-season cultivation of water spinach. After sowing, ventilation and moisture removal should be strengthened when the sun is sufficient and the temperature is high.
1. Winter greenhouse planting technology of water spinach
1. Cultivation season: Greenhouse cultivation can basically achieve annual production and annual supply. In order to obtain higher economic benefits, it can be done in 10 -Sow in December and go on the market from December to March of the following year.
2. Land preparation and fertilization: Water spinach grows very fast and has strong branching ability. It requires a lot of fertilizer and water, so sufficient base fertilizer must be applied when planting. Generally, 1,500-2,000 kilograms of decomposed organic fertilizer and 100 kilograms of plant ash are applied per acre, and they are thoroughly mixed with the soil to form a border of 20 cm high and 130-150 cm wide.
3. Temperature and humidity management: During greenhouse cultivation in winter, the temperature is relatively low, the humidity is high, and the low temperature and rainy weather lasts for a long time, which is extremely detrimental to the growth of temperature-loving water spinach. . Therefore, heat preservation and cold protection are the key to off-season cultivation of water spinach. After sowing, when the sunshine is sufficient and the temperature is high, ventilation and moisture removal can be strengthened to avoid the temperature in the greenhouse being higher than 35°C to prevent plant diseases.
4. Fertilizer and water management: Water spinach can be harvested multiple times, so in addition to applying sufficient base fertilizer, multiple top-dressing fertilizers must be applied to obtain high yields. In the seedling stage, 10%-15% diluted human feces and urine can be applied by drench application, and the dosage per mu is 1000-1500 kg. When the seedlings have 3-4 true leaves, 15-20 kg of compound fertilizer and 2-4 kg of urea can be mixed and applied. . During the harvest period, top dressing is required once every harvest, and 5-8 kg of compound fertilizer per acre is enough.
2. How to heat the greenhouse in winter
1. There are many ways to heat the greenhouse, such as covering with quilts, setting up second membranes, using Alcohol stoves and fluorescent lamps are common heating methods. It is recommended to use alcohol stove or fluorescent lamp, because it is more economical and only costs about 10 yuan a night, and the heating effect is also relatively good.
2. Extreme weather sometimes occurs in winter, especially at night, when the lowest temperature reaches around 0℃. Some greenhouses have a relatively large area and some conventional heating methods cannot increase the temperature quickly. At this time, other heating equipment needs to be used, such as heating blocks or electric boiler heating methods.
3. In addition to the above methods, you can also use a heater. The heater generally uses diesel combustion, and its size will also determine its effect. For example, the 30 kilowatt specification can increase the temperature by 8°C in one night, and the heating rate is also very fast, and the temperature can be increased within an hour. However, there are also disadvantages to using diesel. The amount of oil burned will release carbon dioxide and carbon monoxide. Only oxygen and carbon dioxide in the greenhouse are beneficial to plant growth. Excessive carbon monoxide will also inhibit plant growth.