Key cultivation techniques for spinach in autumn greenhouse
The cultivation characteristics of autumn spinach in greenhouses is that in the early stage of growth, the greenhouse can be grown without shed film (that is, the open field grows), and the shed film is grown in the greenhouse before the frost, and the harvesting time is in early November. At the same time, it can also be shed for cultivation. The cultivation of autumn spinach in greenhouses has considerable economic benefits and simple management methods. The specific practices are as follows:
First, the variety selection.
Choose from spinach 58, spinach 18, omnipotent, spine crown can, etc., strong cold resistance, fast growth, high yield and strong disease resistance.
Second, the land is done.
If the top is planted with fruits and vegetables (generally producing 667 square meters of fruit and vegetables with more than 5,000 kilograms of high-quality organic fertilizer), you can use no organic fertilizer, only apply 45% ternary compound fertilizer or 15% Saco. The specific method is to loosen the floor and loosen it twice. If the production of vegetables by Shangyu causes soil deficiency, about 5,000 kilograms of high-quality farmyard manure per 667 square meters. Mix the organic fertilizer with the buckwheat, and smooth the kneading dough for planting.
Third, sowing.
Sowing is usually from late August to early September. Seeds are evenly sprinkled on the flat surface of the seedlings, the seeding depth is 1 to 1.5 cm, and then stepped on 1 time, stepping on the water. It is best to use a strip. The line spacing is 8 to 10 cm. Generally, 667 square meters of pure seeds are about 4 kilograms. If the seed has low purity and impurities, it can be used to remove impurities and sputum seeds, leaving the seeds to be sown, ensuring that the seedlings are neat and strong.
Fourth, management after planting.
1 temperature. Before the frost, the greenhouse film is generally buckled in the middle and late September. At this time, the temperature is still high during the daytime. The feet of the shed film should be uncovered during the day and night. Later, as the external temperature decreases, the foot is uncovered during the day. close. When the temperature is lowered again, the foot should be sealed during the day. If you encounter high temperatures in the future, you can open the shed door and the upper air outlet for ventilation.
2 moisture. 4 to 5 days after sowing, the seedlings will be released. The soil surface will be watered before the emergence of the seedlings, and the surface will be watered after emergence. In short, we must ensure that the surface of the soil is moist to promote the growth of spinach. The water should be poured once 2 to 3 days before the film is shackled, and it should not be watered until after harvesting.
3 disease prevention and treatment. It is very important to prevent and cure downy mildew in the autumn greenhouse. After watering for 2 to 3 days before the greenhouse film is sprayed, it is necessary to spray the agent for preventing downy mildew, such as 72% cymoxanil. Manganese zinc (Kelu) 600 ~ 800 times liquid. If you find downy mildew after the shed, you should use the smoke agent to prevent and control. For example, use 10% chlorothalonil to remove 300-400 grams per 667 square meters, and apply once every 7 to 8 days. ~3 times, it can effectively inhibit the spread of downy mildew.
Fifth, harvest.
At the end of October, when the plant height is 20 cm, it can be harvested. By the end of November, the harvest is over, and every 5 square meters of oysters can be harvested by 20-30 kg.
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