I. Sowing date and variety
Autumn spinach: sown from August to September, 30 to 40 days after sowing can be harvested in batches. Should choose more heat-resistant, fast-growing early maturing varieties.
Overwintering spinach: sowing from mid-October to early November, harvesting in batches before and after the Spring Festival, the medium and late-maturing varieties that are strong in winter, late in bolting and strong in cold resistance should be selected.
Spring spinach: When the temperature rises after spring, the seeds can be sown. In March, the seeding period is appropriate. After sowing, it is harvested 30 to 50 days after harvesting. The varieties should be selected for late sowing and leaf hypertrophy.
Summer spinach: sown in stages from May to July, harvested from late June to mid-September, and should be selected from varieties that have strong heat-resistance, rapid growth, and are not easily convulsed.
Second, land preparation
Choose fertile, fertile, fertile, well-drained and slightly acidic soils. During the site preparation, over 40 kg of calcium phosphate should be applied. In winter and spring, sorghum should be used. Summer and autumn should be used as flat rakes, and the width should be 1.2 to 1.5 meters.
Third, planting seedlings
Smearing is generally used. In the summer and autumn, the seed is soaked in water for 12 hours before being sowed for 1 week. The seed is placed in a well or in a refrigerator for 24 hours, then germinated, and sowed after 3 to 5 days of budding. Winter or spring can broadcast dry seeds or wet seeds.
After planting water, plant the surface water, sow the soil with the gingivae, so that the seeds are sown in the soil, and a layer of plant ash is added to the surface. After summer and autumn sowing, it is necessary to cover with straw or use a small arch to cover the shade net to prevent high temperatures and heavy rain from scouring. Keep the soil moist and keep the seedlings for 6 to 7 days. If the winter sowing temperature is relatively low, then the plastic film covering the loquat will promote seedling emergence and be removed after emergence.
Fourth, field management
Autumn spinach after the true leaves poured pour water once; 2 true leaves after the seedlings weeding. After sowing, the soil in the winter spinach was kept moist, and water and fertilizer were applied according to the seedling conditions and the weather. Frost and snow and ice weather should be covered with plastic film insulation, it can also be covered with a small arch. Pre-spring spinach should be covered with plastic film insulation, and the seedlings should be exposed after the emergence of the film. Follow-up fertilization water, in the early stage of the transformation of human faecal light, hard-working facilities, especially in the early 15 days before harvest to apply nitrogen available fertilizer. After the emergence of summer spinach, shade nets should be used to cool down.
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