Analysis Of Soil And Vegetation Characteristics In BaoTou Yellow River Wetland

In this thesis,the soil physical and chemical properties and the soil and community characteristics under different community types in the Yellow River wetland of Baotou were analyzed,by studying soil bulk density,water content,N,P,K,Ph and organic matter,the relationships among plant height,coverage,biomass,community diversity and soil of plant communities were analyzed,and the results were as follows:(1)In Zhaojun Island,the soil bulk density is 1.42-1.62 GCM3,the soil bulk density is small,the porosity is large,and the structure is poor,soil bulk density is1.32-1.58 g/cm3 in Zhaojun Island.The contents of organic matter,total n and total P in perennial water were higher than those in seasonal water.The content of soil organic matter in each wetland decreased gradually with the increase of soil depth.The content of soil total n increased first and then decreased with the increase of soil depth in seasonal water-logged area,and decreased gradually with the increase of soil depth in perennial water-logged area.The content of total phosphorus in 0-100 cm soil of each wetland from big to small is: Zhanggaiying Perennial Water Area & GT;sidao Shahe Perennial Water Area & GT;Zhaojun Island Seasonal Water Area & GT;Zhaojun Island Perennial Water Area & GT;Nanhai Zi Perennial Water Area & GT;Xiaobaihe seasonal water area.At present,there are a lot of human activities in the Yellow River wetland of Baotou.The nutrient components of the wetland soil are seriously consumed and the soil fertility is reduced.The soil Ph value of perennial water is less than that of seasonal water.The total salt content of the perennial water-logged soil is less than that of the seasonal water-logged soil.Soil salinization is serious in some parts of the Yellow River wetland in Baotou.(2)The plant communities in the Yellow River wetland of Baotou can be divided into six plant communities: Reed,Artemisia Frigida,Scirpus plantarum,Suaeda Salsa and Ranunculus Salina,the plant communities showed significant spatial differences by adapting to the movement of Soil Water and salt and the distribution of soil nutrients in their respective regions.According to the membership function analysis,Suaeda Glauca improved the soil the most.(3)The plant communities of six typical wetland types in the study area were single,including 14 plant species in 8 families,the plant height varied from 30.50 cm to 193.33 cm,and the plant coverage was from 75.00% to 90.00% The plant community diversity of each wetland type is different,and the above-ground standing amount of each wetland type is quite different.