In which provinces are the cyan and white colors of five-color soil in China? Want to buy something useful, buy it at a high price! ! ! !

Black soil The northeast plain of China is wet and cold, with weak microbial activity, and the organic matter in the soil decomposes slowly and accumulates more, so the soil color is dark.

Loess The soil on the Loess Plateau in China is yellow, which is due to the low content of organic matter in the soil.

Minerals in the red soil in the south of China, which is hot and rainy, are strongly weathered and completely decomposed. Almost all water-soluble minerals are lost, and only minerals such as iron oxide and aluminum remain in the upper soil, forming red soil.

In the case of poor drainage or long-term flooding, iron oxide in red soil is often reduced to light blue ferrous oxide, and the soil turns gray-blue, such as some rice fields in the south.

Saline soil and alkaline earth with high salt content such as magnesium and sodium are often white.

terre verte

Also known as irrigated desert soil, it is mainly distributed in oases in desert areas of Xinjiang and Hexi Corridor, and is the main cultivated soil in arid areas. Irrigation siltation layer can even be as thick as1.0 ~1.5m; Irrigation and siltation layer in Kanerjing irrigation area shall not exceed 1 m.. The stratification of these thick irrigation and siltation layers is not obvious, and the organic matter content in the upper layer is generally 1 ~ 2%, and the lower layer can reach 0.5 ~ 0.7%. Phosphorus and potassium are abundant. The content of calcium carbonate is generally 10-20%, which is evenly distributed. But it is easy to harden and secondary salinization. The main ways to improve fertility are the combination of irrigation and drainage, the construction of windbreak belts and forest nets, reasonable rotation, and a variety of green manure and pasture.

Meadow and swamp soil series are wet soil. It belongs to aqueous and semi-aqueous soil types.

anorthite

Under the surface humus layer, there is a gray-white slurry layer, hence the name. It is distributed in mountainous basins and valleys in the eastern part of Northeast China, with humid climate and shallow-rooted plants that like humidity. The accumulation of soil organic matter is not as good as that of black soil, and it often has peat characteristics because of poor decomposition of organic matter. The content of organic matter in the surface layer of albic soil is 8 ~ 10%, and the texture below albic soil layer is mostly heavy loam and clay. The white slurry layer is light in texture and the leaching loss of iron is obvious. Clay minerals are mainly hydromica, with a small amount of kaolinite and uncertain substances.