Select varieties can use spinach hybrid 58, spinach hybrid 18, all-round, and the hybrid crown can be suitable for planting varieties in early spring greenhouse.
Soil fertigation After autumn harvest, do not remove the shed film. Apply fertilization, soil preparation, and planting in the middle or late November. Generally, the quality per mu is sufficient to fully decompose 3,000 to 5,000 kilograms of farmyard manure, 20 to 25 kilograms of diammonium phosphate, 10 to 15 kilograms of potassium sulfate, or 40 to 50 kilograms of 45% triad compound fertilizer, making a flat width of 1 to 1.5 meters. plot.
One day before seed treatment, spinach seeds were soaked in cold water for about 12 hours. Remove mucus, remove, drain, and sow; or germinate at 15°C to 20°C. Seeds can be sown after 3 to 4 days.
Sowing is generally planted at the beginning of December. When sowing, spread the seeds evenly on a flat surface and sow the seeds to a depth of 1 to 1.5 cm. Then, step on them again, and then step on them. It is best to use drills. Line spacing is 8 to 10 cm. Generally about 4 kg of pure seeds are sown per acre.
Before the scientific fertilizer is applied to the winter, the spinach seedlings are about 10 cm high. According to the growth conditions, the over-wintering fertilizer should be applied one at a time, and 10 to 15 kg of urea and 10 to 15 kg of superphosphate should be applied per mu. After the Spring Festival, the seedlings began to grow, should apply 20-25 kg of urea, 15-20 kg of phosphorus and potassium fertilizer, every 10-15 days to recover the 3rd fertilizer.
After planting crops in the field until mid-February in the following year, the maintenance of seedlings is the main focus. Pour water 1 time before the snow festival to protect the seedlings. In mid-February of the following year, with the constant increase of outside air temperature, spinach began to grow back to green, and it was necessary to pour water once. By the beginning of March, it was necessary to top-dress one-time fertilizer with water, and to recover 15 to 20 kg of ammonium sulfate or urea per mu, until Harvest and harvest.
Prevention and control of locusts in a timely manner to clean the pastoral areas, and do a good job of locust control around the vegetable fields. If locusts occur early, they should be controlled with 20% chlorfenthrin 2000-3000 times, or 50% anti-influx 2500 times. The spraying was stopped 10 to 15 days before the spinach was harvested.
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