How to fertilize spinach in winter?

How to fertilize spinach in winter? What kind of fertilizer should be used for spinach fertilization? And ask experienced netizens to help introduce them.

Spinach is a cold-tolerant vegetable, the seeds can germinate at 4 ℃, the most suitable is 15-20 ℃, the aboveground part of spinach can withstand the low temperature of minus 6-8 ℃, so it is one of the main dishes in winter, and spinach is rich in carotenoids, vitamin C, vitamin K, minerals (calcium, iron, etc.), coenzyme Q10 and other nutrients, which is a nutritional model in vegetables.

Spinach is a leafy vegetable, so it needs more nitrogen fertilizer and appropriate phosphorus and potassium fertilizer in the growth process, so the farming network has sorted out the fertilization methods in the cultivation of spinach, which are listed in detail below for netizens' reference.

First, the basic fertilizer of spinach:

Because the growth period of overwintering spinach is longer, the base fertilizer must be sufficient in order to prevent de-fatting. Generally, organic fertilizer and all phosphorus and potassium fertilizers should be used as base fertilizer, and then the soil is prepared to make the bed.

Second, reduce the application of nitrogen fertilizer to spinach before overwintering:

Spinach before overwintering, it is best to keep spinach growing 4-5 true leaves before overwintering. Because spinach with 4 or 5 true leaves has the strongest cold resistance, it is easy to suffer frost injury if it is too big or too small. Therefore, if the sowing time is appropriate and the fertilizer accumulation is sufficient, the application of nitrogen fertilizer should be properly controlled before overwintering to prevent seedlings from freezing injury due to the decrease of dry matter and sugar accumulation. If the sowing is too late or the soil fertility is insufficient, we can consider topdressing nitrogen fertilizer to promote seedling growth to ensure that spinach overwinters at a suitable seedling age.

Third, after the spinach turns green, topdressing and watering it in time:

The key to the fertilizer and water management of spinach after overwintering and turning green is to seize the opportunity of topdressing. Topdressing of spinach is carried out with irrigation, and early topdressing after turning green will reduce soil temperature and affect slow seedling and growth; topdressing will delay the growth of spinach. Generally speaking, it is suitable for overwintering spinach to be applied twice in mid-March, late March and early April, because the external air temperature and soil temperature are steadily rising at this time.

Fourth, the reasons for topdressing spinach:

Topdressing of spinach is best carried out before bolting and flowering. Because topdressing at this time can prolong the bolting and flowering time of spinach and improve the yield and quality of spinach.

Fifth, the main points of fertilizer for growing spinach:

Because spinach is sensitive to ammonium nitrogen fertilizer, the production season of overwintering spinach is at the junction of autumn, winter and spring, when the soil temperature is low and the digestion of soil is very weak, so it is best to use less ammonium nitrogen fertilizer and more nitrate nitrogen fertilizer.