Song people can eat spinach when eating hot pot. The types of vegetables eaten by the ancients experienced a process from less to more. During the Qin and Han Dynasties, China people mainly ate five kinds of vegetables: sunflower, epimedium, onion and leek. Spinach was introduced from Nepal in the Tang Dynasty, and potatoes were introduced in the late Ming Dynasty. Song Dynasty was later than Tang Dynasty and earlier than Ming Dynasty, so people in Song Dynasty could eat spinach.

Song people can eat spinach when eating hot pot. Spinach was introduced from Nepal during the Tang Zhenguan period, and potato was introduced in the late Ming Dynasty. Song Dynasty was later than Tang Dynasty and earlier than Ming Dynasty, so people in Song Dynasty could eat spinach. Spinach, also known as Persian cuisine, red root cuisine, parrot cuisine, etc. It belongs to the genus Spinach of Chenopodiaceae and the genus Panicum. The height of the plant can reach 1 m, the root is conical, reddish, less white, the leaves are halberd-shaped to oval, bright green, whole or with a few toothed lobes. There are many kinds of spinach, which can be divided into spiny and spiny varieties according to seed morphology. Spinach is native to Iran and widely cultivated in China. It is one of the most common vegetables.

Spinach powder can be as high as 1 meter. The roots are conical, reddish and rarely white. The stem is erect, hollow, fragile and juicy, unbranched or with several branches. Leaves halberd-shaped to oval, bright green, tender and juicy, slightly shiny, entire or with several toothed lobes. Male flowers are integrated into spherical cymes, and then arranged into intermittent panicles on branches and stems; Tepals usually 4, filaments filiform, flat, anthers without appendages; Female flowers gather in leaf axils; Bracteoles are slightly flat on both sides, with 2 small teeth at the top and 1 spinous appendage on the back. Ovary spherical, stigma 4 or 5, prominent. Utricle ovoid or suborbicular, about 2.5 mm in diameter, flat on both sides; The skin is brown.

Growing environment:

1, temperature

Spinach is a cold-tolerant vegetable, seeds can germinate at 4℃, the optimum temperature is 15 ~ 20℃, the optimum temperature for vegetative growth is 15 ~ 20℃, the growth is poor above 25℃, and the aboveground part can tolerate -6 ~ 8℃ low temperature.

2. sunshine

Spinach is a long-day crop. Under the condition of high temperature and long sunshine, plants are easy to blossom at jointing stage, and the requirements for sunshine intensity are not high, so they can be interplanted with tall crops.

Step 3: Moisture

Spinach leaves have large area, soft tissue and high water demand. Sufficient moisture, thick meat when growing vigorously, high yield and good quality. Under the conditions of high temperature, long sunshine and drought, vegetative growth is inhibited, reproductive growth is accelerated, and premature bolting is easy.

4. Land

Spinach has strong adaptability to soil, but it is better to keep water and fertilizer in fertile soil. Spinach is not acid-resistant, and the suitable pH value is 7.3 ~ 8.2. Spinach is a leafy vegetable, which needs more nitrogen fertilizer and appropriate amount of phosphorus and potassium fertilizer.