Spinach is cold and cold, afraid of hot. The seed Coat of the seed is thicker and absorbs water more slowly. If the seed is sown at a high temperature of 25 ° C or above, the seed germination is difficult, and the seedling stage is easily affected by the thunderstorm, so it is easy to cause the seedling to be irregular and the emergence rate is low.
Germination
There are many ways to germination of spinach seeds. If you have a vegetable grower, you can soak the spinach seeds for 20-24 hours, then remove the filtered water and discharge the refrigerator for low temperature germination. It is better to control the temperature at 2-4 °C during germination. The seeds should be kept moist and should be flipped frequently so that they can germinate after 3-4 days. If there is no refrigerator, the spinach seeds can be soaked first, then spread in a cool place indoors or wrapped in sand cloth, and hung on the water surface of the well for velvet. This will sprout after 5-6 days.
Fine seeding
In the summer and autumn high-temperature season, spinach should be selected to be more resistant to heat and easy to germinate. Spinach seeds can be germinated and then sown to increase the emergence rate. However, when planting, it is necessary to apply enough base fertilizer, fine soil preparation, and then plant the bottom water. After the sowing, spray or water once a day in the morning and evening to keep the soil moist until the watering can be stopped after emergence. If it is not the spinach seed that is sown in the high temperature period (before the cold dew), it is not easy to emerge due to the high temperature. After sowing, it can be covered with a covering such as a reed curtain, a shade net, straw or wheat straw, and the cover will be exposed after emergence. go with. This will promote the emergence of spinach tidy and increase the emergence rate.
Field management
Large-scale production of spinach is generally started in mid-August. Before planting, first make a good ground, open a ditch, and apply a good base fertilizer. Generally, 20-25 kg of compound fertilizer is applied to the mu, and 700-800 kg of manure and manure is used as the base fertilizer. Then live broadcast. After the sowing, the clay soil will be photographed, and the noodles will be covered with straw curtains and straw to promote the seedlings. Top dressing every 5-6 days after emergence. If planted in midsummer, it should be covered with a shade net. Because the sunshade net has the functions of shading, cooling, windproof, rainproof, and drought resistance. Therefore, it can promote the normal growth of spinach. 6-7 days after emergence, the seedlings should be removed, and the densely grown and weakly grown spinach seedlings should be removed. Multiple top dressings should be carried out with light manure water during growth. Topdressing is mainly based on nitrogen fertilizer, and it is not possible to apply concentrated fertilizer. During the growth period, according to the degree of soil drought, timely watering should be carried out to protect against drought and seedlings. Generally, in mid-to-late September, it can be sold in stages and in batches to promote the planting efficiency and increase the economic income of the vegetable farmers.
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