Investigation and Protection of Biodiversity in the Sandy Land in Middle Yanchi;

Grassland ecological replacement in Xinjiang and its reference for Yanchi county of Ningxia;

Study on means of tackling and protecting eco-environment in Yanchi;

Biodiversity and desertification in the ecotone of agriculture-animal husbandry——Taking Yanchi county of Ningxia Hui Autonomous Region as an example;

Plant Diversity in the Process of Vegetation Restoration in Yanchi County of Ningxia Hui Nationality Autonomous Region

Yanchi county,Ningxia Hui Autonomous Region located in the ecotone of agriculture-animal husbandry of China is one of the representative belt in the north of China.

On Important Role of Hedong Salt Lake in the Origin of Huaxia Civilization;

Yuncheng salt lake is an important salt lake in China,with good abundant human tourist resources.

Field investigation over many years has found 35 species(including varieties) and 17 genera of Cyanophyta in the salt lake region of Yuncheng County,Shanxi province,and the species and genera consist of 19 species and 9 genera of Chroococcaceae,1 genus and 1 species of Rivulariaceae,12 species and 4 genera of Oscillatoriaceae,and three species and three genera of Nostocaceae.

The salt pond in Hedong is the important salt producing area in the inner part of China,and the taxation on it is one of the important sources of government revenues,hence it has been highly regarded by the rulers since ancient times.

There were more than 49 salt ponds in Tang Dynasty, and they were mainly located in the Northwest.