Summer is hot and rainy, it is difficult to grow spinach, but the market is good and the income is considerable. Use greenhouses or greenhouses in the summer, use rain-proof methods, and harvest them for more than a month. The main cultivation techniques are as follows:
First, the rain sun shade pest control. Covering the shed film with a sunscreen with a light transmittance of 50%, or applying mud to the shed film, can significantly reduce the temperature inside the shed. The area around the shed is raised to a height of 1 meter, and an insect net of 60 to 70 mesh is enclosed to prevent insects from entering the shed.
Second, choose heat-resistant varieties. In general, the winners produced by K4, K5, K6, K7 and Novartis produced by the Dutch “Bujiu†company are generally able to withstand a high temperature of 34°C. The sowing time is from May to September.
Third, ridge cultivation. Spinach cultivation in summer is most afraid of moisture, easy to get stalk rot, ridge cultivation can keep the base of the leaves well ventilated, not easy to get sick. Generally 50 cm from a ridge, two rows per ridge, 5 cm point a hole, two points per hole, about 1 kg per acre species.
Fourth, fertilizer and water use. Spinach likes fertile, moist, slightly alkaline, humus high soil content, so to re-apply organic fertilizer, usually with 1,000 kg of chicken manure per acre, boron and magnesium fertilizer 2 kg per acre, top dressing is best to use potassium nitrate, each The next 15 kilograms, should pay attention to dry watering when watering, planing after pouring, to prevent the ground from growing moss.
Fifth, pest control. Summer spinach is easy to get stalk rot, anthrax, azoxystrobin, carbendazim, thiophanate-methyl equivalent spray once, to prevent in advance. To prevent the virus disease, we need to take care of the shade, cool down and prevent rain, prevent excessive drought, increase organic fertilizer, potash fertilizer, and trace element fertilizer every 7 days. If spotted lees, aphids, aphids, etc., can be controlled with avermectin, imidacloprid, or pymetrozine.
Six, timely harvest. When spinach grows to 20 to 30 centimeters in height, it must be timely harvested. Due to the high temperatures in summer, spinach is not tolerant to high temperatures, and it is not until late to harvest.
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