Greenhouse autumn spinach cultivation technology
The characteristics of cultivation of autumn spinach in greenhouses are that, in the early growth period, the growth of the greenhouse film (ie, open field growth) can be prevented in the greenhouse, and the film is grown in the greenhouse before the frost is frozen. The harvest time is in early November. At the same time, it can also be woven film cultivation. There are considerable economic benefits from planting autumn sheds, and management methods are simple.
Variety selection: Use cold resistance, fast growth, high yield, and strong disease resistance.
Site preparation: If the upper crop is grown on fruit and vegetables, this can be done without applying organic fertilizer. Only 45% tricomponent compound fertilizer or 15% Scatterner can be applied. The specific approach is to loosen the land once and for all. If the Shangyu produces vegetables that cause the lack of fertilizer in the soil, the quality of the farmyard fertilizer per acre will be around 5,000 kg. Mix the organic fertilizer with the alumina and turn it flat to wait for sowing.
Sowing: Generally sown in late August to early September. When sowing, spread the seeds evenly on a flat surface and sow the seeds to a depth of 1 to 1.5 centimeters. Then, step on them again and pour on the water. It is best to use drills. Line spacing is 8 to 10 cm. General acres of pure seed sowing about 4 kg. If the seeds are of low purity and impurities, they can be used to remove impurities and alfalfa seeds, and the remaining seeds will be sown to ensure that they will emerge neatly and grow stronger.
Management after sowing: before the next frost, usually in the middle and late September, the greenhouse film is buckled. At this time, the temperature is still high during the daytime. During the day and night, the feet of the shed film should be uncovered, and then with the decrease of the outside temperature, the end of the daytime. Feet opened and closed at night. When the temperature decreases again, the feet should be sealed during the day. If you encounter high temperatures in the future, you can open the greenhouse door and uptake for ventilation. 4 to 5 days after sowing, the seedlings are to be seeded. Water is poured on the surface of the soil before emergence, and the surface is watered after emergence. In short, we must ensure that the surface of the bauxite is moist to promote the growth of spinach. 2 to 3 days before the film is used to pour water once. After the film is buckled, it is not necessary to water before harvesting. In the autumn greenhouse, spinach is easy to get downy mildew, and it is very important to do well in prevention and control. After spraying the water in the greenhouse for 2 to 3 days, the agent for preventing downy mildew should be sprayed once, such as 72% cymoxanil zinc (glucose) 600-800 times. If a downy mildew occurs after the shed, it must be treated with a smoke agent. For example, use 10% chlorothalonil smoke agent 300-400 grams per acre, apply once every 7-8 days, and continuously control 2-3. Second, it can effectively inhibit the spread of downy mildew.
Harvesting: At the end of October, when the plant height is 20 centimeters, it can be harvested. By the end of November, harvesting will be completed. For every 5 square meters, 20-30 kilograms can be harvested.
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