Rice: Gramineae and Oryza are annual aquatic herbs widely cultivated in tropical Asia. After hulling and peeling, it is called rice, which is big and milky white. South China is the main rice producing area, and it is also planted in northern provinces.

Chestnut: an annual plant of Gramineae and Setaria, which is called millet after shelling and peeling. It is small, yellow and spherical, and originated from the Yellow River valley in northern China. Mainly distributed in Shandong, Hebei, Northeast, Northwest and other places.

First, species differences.

1. Rice is an annual aquatic herb of Gramineae and Oryza, which is called rice after hulling and peeling. Nearly half of the world's population lives on rice.

2. Millet is an annual plant of Gramineae and Setaria, which is called millet after hulling and peeling.

Second, morphological differences.

1. The leaf sheath of rice is loose and hairless, the tongue is lanceolate, and the bases on both sides extend to the edge of the leaf sheath. There are two sickle-shaped auricles, the leaves are linear-lanceolate, about 40cm long and 1cm wide and rough. After hulling, the rice grains are large, milky white and olive-shaped.

2. The stem of millet is cylindrical, with a height of 60- 150cm, and several nodes at the base can produce tillers. A few varieties have branches on the upper part, one leaf per node, long lanceolate or linear lanceolate leaves, sharp apex, blunt base, rough top and slightly smooth bottom. The shelled millet is small, yellow and spherical.

Third, the difference of distribution range.

1. Rice is an important grain widely cultivated in tropical Asia. South China is the main rice producing area, and it is also cultivated in northern provinces.

2. Millet originated from the Yellow River Basin in northern China, mainly distributed in Shandong, Hebei, Northeast and Northwest China, and was the main food crop in ancient China.

Fourth, the difference between eating methods.

1. besides being edible, rice can also be used as an industrial raw material for brewing wine and sugar, and rice husk and straw also have many uses. Straw ropes, sandals and hemp fibers woven with straw except cattle, sheep and other livestock.

Millet can be used for porridge and cooking, and it is also the raw material for making caramel and wine. Its stems and leaves are hard and can be used as feed, which is a good feed for mules, horses and donkeys.