It is hot and rainy in summer, and it is difficult to grow spinach, but the sales are good and the income is considerable. Use the greenhouse or greenhouse for summer leisure, planting with rain-proof methods, and harvest for more than a month. The main cultivation techniques are as follows:
First, rainproof sunshade and pest control. A shade net with a light transmittance of 50% is applied to the shed film, or the mud is applied to the shed film to significantly reduce the temperature inside the shed. The surrounding area of ​​the shed is 1 meter high, and a 60-70 mesh insect net is enclosed to isolate insects from entering the shed.
Second, the selection of heat-resistant varieties. Generally, the K4, K5, K6, K7 and Novartis produced by the Dutch "Yujiu" company are used to win the high temperature of 34 °C. The sowing period is from May to September.
Third, ridge cultivation. Spinach cultivation in summer is most afraid of moisture, easy to get stem rot, ridge cultivation can keep the base of the blade well ventilated, not easy to get sick. Generally, a ridge from 50 cm, two rows per ridge, one point at 5 cm, two points per hole, about 1 kg per mu.
Fourth, the use of fertilizer and water. Spinach prefers fertile, moist, alkaline, and humus-rich soils. Therefore, it is necessary to re-apply organic fertilizer. Generally, 1000 kg of decomposed chicken manure is used per mu, and boron-magnesium micro-fertilizer is 2 kg per mu. It is best to use potassium nitrate fertilizer for topdressing. After 15 kg, you should pay attention to dry watering when watering, and then paddle after pouring to prevent the ground from growing moss.
Fifth, pest control. The summer spinach is easy to get stem rot and anthracnose. It is sprayed once a day with azoxystrobin, carbendazim and methyl thiophanate. To prevent viral diseases, spray the diseased disease, virus A, etc. every 7 days, but also pay attention to the shade to cool down and prevent rain, prevent excessive drought, increase the application of organic fertilizer, potassium fertilizer and micro-fertilizer. If plaque, aphids, mites, etc. occur, it can be controlled with avermectin, imidacloprid or pymetrozine.
Sixth, timely harvest. When the spinach grows to a height of 20 to 30 cm, it should be harvested in time. Because of the high temperature in summer, the spinach is not resistant to high temperatures, and the harvest should be better than late.
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