Distribution Characteristics Of Plant Communities And Response To Soil Environmental Factors In Shangduhe National Wetland Park,Zhenglanqi

In order to explore the plant community structure characteristics,differences and environmental factors of Zhengduqi Shangduhe National Wetland Park,select typical grasslands,typical meadows,typical swamps,swampy meadows and salinized swamps in order from upstream to downstream 5 types of wetland types are studied.Wetland plants are investigated,soil samples are taken,and soil pH,organic matter,nitrogen,soil water content,soil bulk density,peat layer thickness,and groundwater table depth are used.The distribution characteristics of plant communities under wetland types and their environmental impact factors were discussed.Indicator species were selected for different wetland types according to the important values of species.The results of this study will help the construction and wetland restoration of the Shangduhe National Wetland Park in Zhenglan Banner The reconstruction provides guidance and theoretical basis.The results show that:(1)The investigation found that there are 202 plants in Shangduhe Wetland Park,belonging to 47 families and 139 genera.The order of the overall species number among different wetland types is in order of typical meadow(71 species),swampy meadow(62 species),salinized marsh(56 species),typical grassland(52 species)and typical marsh(47 species).Biomass in order from large to small is typical swamp(455.32g/m2),typical grassland(255.84 g/m2),swampy meadow(235.16 g/m2),salinized swamp(222.52 g/m2)and Typical meadow(181.76 g/m2)(2)The species richness index and Shannon-Wiener diversity index of typical meadows are the largest,the typical swamp species richness index is the smallest,the Simpson dominance index and the Pielou evenness index are the largest.Overall,the Shangduhe wetland is different from the wetland The pattern of diversity differences among types is large,indicating that the Shangduhe Wetland Park is rich in biodiversity.(3)The pH value of the Shangduhe wetland is not obvious,the pH value is between 7.96-8.43;organic matter,nitrogen,phosphorus and soil water content all show that the content gradually decreases as the soil depth becomes deeper,and the organic matter content and total Except for typical grasslands,the nitrogen content has reached the first influence of water content and soil total phosphorus;the species of typical grasslands are basically xerophytes or medioxerophytes,and their species distribution is not affected by various soil factors;the species of salinized swamps are mainly affected by soil pH;typical The species of swamps are mainly affected by soil organic matter and total nitrogen.(5)Stipa krylovii Roshev and Leymus chinensis can be used as indicator species for judging typical grassland,and it can be deduced that the pH value and soil bulk density of the area are slightly higher in the Shangduhe wetland High;Ranunculus japonicus and Equisetum arvense can be used as indicators for judging typical meadows,and it can be deduced that the soil moisture content and the total phosphorus content of the area in Shangduhe Wetland are low;yellow Daidai(Ranunculus ruthenicus)and Carex duriuscula can be judged as a swampy meadow in this area,and it can be inferred that the soil water content and total phosphorus content of this area in the Shangduhe wetland are higher;alkali Suaeda glauca and Juncellus pannonicus can judge the area as a salinized swamp and infer that the pH,soil organic matter and total nitrogen content of the area in Shangduhe Wetland are relatively high;Phragmites communis and Bolboschoenus planicalmis can infer that the organic matter and total nitrogen content in this area are the highest,and it can also be judged that the place is typical Marshland.