What are the methods of growing spinach? Why can't you eat at night? (with variety classification)

Spinach is one of the green vegetables, also known as Persian vegetables, spinach, parrot vegetables, red root vegetables, dragon vegetables. Spinach is widely planted in China, and it is cultivated in many areas. And it has many kinds and high nutritional value. So what are the methods of growing spinach? What are the categories of spinach varieties? Why can't spinach be eaten at night?

I. the method of growing spinach

1. Sowing time

Spring spinach can begin to sow when the temperature rises above 5 °C after the beginning of spring. March is the suitable sowing time. Summer spinach is sown in May-July, autumn spinach is sown in August-September, and overwintering spinach is sown in mid-October to early November.

2. Land preparation and border formation

Choose loose and fertile, water and fertilizer conservation, good drainage and irrigation conditions, slightly acidic loam is better, PH value 5.5-7. When preparing the soil, 4000 kg of rotten organic fertilizer and 40 kg of superphosphate should be applied per mu, which should be high in winter and spring and flat in summer and autumn, with a width of 1.2-1.5m.

3. Sowing and raising seedlings

The planting method of spinach is to spread. Before sowing, soak the seeds in water for 12 hours, soak them in the refrigerator for 24 hours, remove them and put them in the environment of 20-25 degrees Celsius to accelerate germination. They can germinate in about 3-5 days, and sow seeds after germination. In order to ensure the yield, sowing about 3.5kg per mu, watering once after sowing, covering the soil with 2-3cm, keeping the soil moist, the seedlings can be ready in about a week.

4. Field management

Spinach has strong growth power, and it can grow on its own as long as it emerges, but in order to ensure its yield, it is necessary to carry out inter-seedling when it grows true leaves, which can be weeded in time at the same time. Grow 3-4 true leaves can be irrigated once thin fertilizer water, fertilization should not be too thick, lest excessive fertility lead to root burning death.

II. Classification of spinach varieties

According to the seed morphology, spinach can be divided into two varieties: thorn species and non-thorn varieties.

1. There are thorn species

Fruit diamond-shaped thorn leaves are small and thin, hastate or arrow-shaped, because of the soft texture, less astringent taste, suitable for edible (pointed leaf type). Strong cold resistance, early maturing and early bolting.

2. Non-thorn species (garden leaf type)

The fruit is irregular round, unarmed, leaf hypertrophy, wrinkled, oval, oval or irregular shape, short petiole, weak heat tolerance, late bolting, suitable for overwintering cultivation.

Why can't spinach be eaten in the evening?

Spinach can not be eaten at all at night, you can eat the right amount of spinach at night, but it is not good to eat too much.

If you really want to eat spinach in the evening, it is best to boil the spinach in boiling water first and boil the oxalic acid clean inside. If you don't cook it, the calcium oxalate inside is very easy to have stones.

In addition, pregnant women should not eat more spinach. Zinc and calcium are indispensable trace elements in the human body. if the human body lacks zinc, people will feel loss of appetite and decreased sense of taste. If pregnant women eat too much spinach, it is undoubtedly detrimental to the development of the fetus.