1. Clay basin. Pot, also called earthen pot, is the most commonly used flowerpot for growing flowers. This pot is made of ordinary clay, dried and fired in a kiln. Low price, good air permeability and water permeability. It's just not beautiful in appearance. At the same time, some uncooked pottery pots will become brittle and broken after one or two years.

2. Purple sand basin. The appearance of this kind of basin is smoother than that of clay basin, and some of them are coated with a layer of glaze, which is firm, hard and durable, but the air permeability and water permeability are poor. Can be used as household and washbasin, widely used in southern China.

3. Porcelain pots. This kind of flowerpot has poor air permeability and water permeability, but it is often used as a set of flowerpots with various colors of glaze, some with exquisite pictures or pleasing patterns, and some with shiny Phnom Penh, which has the function of beautifying the environment.

4. Plastic basin. This is a new product after the development of plastic industry in recent years. It is light and durable, and its appearance is quite beautiful. However, the ventilation and water seepage function is poor, and it is limited by temperature and afraid of sun exposure. It is very light, suitable for washbasins and washbasins, and is not very popular with flower growers.

China is rich in Devonian sedimentary minerals, including iron and manganese, phosphorus, limestone and glass raw materials.

Iron ore is mainly distributed in South China, such as Hunan, Hubei, Jiangxi, Guangxi, Guangdong, Guizhou, Sichuan, Yunnan, Shaanxi and Henan. The deposit types are iron ore and siderite, some of which can reach industrial value. The main horizons are the top of Lower Devonian, the middle of Middle Devonian, the lower part of Yutianqiao Formation of Upper Devonian and the middle of Xikuangshan Formation. Iron comes from Jiangnan ancient land.

Manganese ore is mainly distributed in Guangxi. The deposit type is mainly manganese carbonate deposit. Manganese oxide deposits are formed by secondary enrichment of primary sedimentary deposits. Manganese comes from Jiangnan ancient land.

Phosphate rock is mainly distributed in southwest Guangxi. Only two horizons are favorable for phosphate rock deposition, namely, Tang Ding Formation of Lower Devonian and Nabiao Formation of Middle Devonian. Phosphate rock is strictly controlled by siliceous rock facies.