Shortcomings of Qingzhou air grassland in Dazhou

Small area and remote geographical location, it is not very convenient for friends from far away areas to come here. The climate is not very comfortable, only from June to August. High consumption in the tourist season (June-August).

Grassland is a kind of earth ecosystem, which is divided into tropical grassland and temperate grassland, and it is the most widely distributed vegetation type on the earth. The reason for the formation of grassland is that the soil layer is thin or there is little precipitation, and the herbaceous plants are less affected, so the plants cannot grow widely. China is one of the countries with the richest grassland resources in the world, with a total grassland area of nearly 400 million hectares, accounting for 40% of the total land area, which is three times of the existing cultivated land area.

Grassland originated in the dry and cold period of global climate (appearing in Cenozoic), similar to the wilderness, desert and shrub land where they often blend. In fact, Gramineae itself (Gramineae and Gramineae) only evolved in the early Cenozoic. The earliest date of grassland appearance varies from place to place. In many areas, a series of vegetation types can be found in Cenozoic fossils, when the climate changed gradually. For example, in the past 50 million years, the tropical rain forest in central Australia has been replaced by wilderness, grassland and finally desert. In some places, the expansion of grassland to modern scale only appeared in the extremely dry and cold period 2 million years ago, which was called the "ice age" in the northern temperate zone.