In the early stage of growth, the autumn spinach in the greenhouse can be grown without shed film (that is, open field growth), and the greenhouse film growth is carried out before the frost, and the harvesting time is in early November. The cultivation of autumn spinach in greenhouses has considerable economic benefits and simple management methods. The specific practices are as follows:
1, variety selection
Choose from varieties such as spinach 58, spinach 18, omnipotent, and spine crown, which have strong cold tolerance, fast growth rate, high yield and strong disease resistance.
2, the soil preparation
Turn the vegetable field over and over again, and simmer the noodles. 667m2 high-quality farmyard manure 5000kg, the fertility is poor, then apply the appropriate amount of 45% ternary compound fertilizer or 15% Saco. Mix the organic fertilizer with the buckwheat and smooth the noodles.
3. Scientific 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 ~ 1.5cm, 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, 667m2 broadcasts about 4kg of pure and full seeds.
Summary of planting techniques for autumn spinach in greenhouse
4, shed management
4.1 Temperature
Before the frost, the greenhouse film is usually buckled in the middle and late September. The mask of the greenhouse will be uncovered during the day and night. Later, as the outside temperature decreases, the skirt will be uncovered during the day and closed at night. When the temperature is lowered again, the mask should be sealed during the day. In case of high temperature, open the shed door and the upper air outlet for ventilation.
4.2 Moisture
4 to 5 days after sowing, the seedlings should be released, and watered in time before and after emergence to 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.
4.3 Disease prevention
In the autumn greenhouse, spinach is easy to get downy mildew. After watering for 2 to 3 days before the greenhouse film is sprayed, 72% of the cyanoguanidine-manganese-zinc (Ke) 600-800 times solution is sprayed once. After the shed, the downy mildew disease was found to be 10% bacteriostatic agent 300 ~ 400g / 667m2, once every 7 ~ 8 days, continuous control 2 ~ 3 times, can effectively inhibit the spread of downy mildew.
5, timely harvest
At the end of October, when the plant height is 20cm, it can be harvested. By the end of November, the harvesting is over, and every 5 m2 of sputum can be harvested by 20~30kg.
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