First, the introduction of radish:

1. Radish types in autumn and winter: common cultivated types in China. Sowing in late summer and early autumn, harvesting in late autumn and early winter, and the growth period is 60- 100 days. According to skin color and use, it can be divided into red skin, green skin, white skin, green skin and red hearts. Representative varieties are Xuecheng Changhong and Jinan black Crispy.

2. Radish types in winter and spring: China, Jiangnan and Sichuan, which are not too cold in winter. Cold-resistant, strong in winter, not easy to glume. Representative varieties are Chengdu Chunbu Laobo, Hangzhou Jianqiao Dahongying Radish and Chenghai Nanpanzhou Late Radish.

3. Radish types in spring and summer: widely planted in China. Cold tolerance, strong overwintering, short growth period, generally 45-60 days, easy to bolting in advance due to improper sowing date or cultivation management. Representative varieties include Beijing canned bamboo tube, Penglai spring radish and Nanjing plum red.

4. Radish type in summer and autumn: it is widely cultivated in the south of the Yellow River Basin in China, and it is often used as a vegetable in summer and autumn. Resistant to damp and heat, the growing period is 50-70 days. Representative variety Hangzhou Xiaogoubai.

Second, the introduction of potatoes:

1, potato likes to be cold, and it is a low-temperature crop. The formation and growth of underground potato requires a loose, breathable, cool and moist soil environment.

2. Temperature requirements for potatoes: The optimum temperature for tuber growth is 16℃~ 18℃, and when the local temperature is higher than 25℃, the tuber will stop growing; The optimum temperature for stem and leaf growth is 15℃~25℃, and it will stop growing when it exceeds 39℃.

Third, the introduction of lotus root:

1, lotus root is slightly sweet and crisp, which can be eaten raw or cooked, and its medicinal value is quite high. Its roots, leaves, flowers and fruits are all treasures of lotus root, which can nourish and be used as medicine. Lotus root powder can help digestion, stop diarrhea, stimulate appetite, clear away heat, nourish and prevent internal bleeding.

2. Made of lotus root powder, it can help digestion and stop diarrhea, stimulate appetite and clear heat, nourish the body and prevent internal bleeding. It is a good liquid food and nourishing treasure for women, children and the infirm. During Xianfeng period of Qing Dynasty, it was awarded as a royal tribute. Lotus root originated in India and was later introduced to China.