Distribution Characteristics of Sulfur Content in Soils in Coastal Wetlands of the Yellow River Delta
According to vegetation distribution characteristics and land use status,the soil samples were collected regularly from the fixed sample sites which selected in coastal wetland of the Yellow River Delta based on grid method to study the distribution characteristics of soil total sulfur and its influencing factors.The results showed that the average contents of total sulfur in 0-30 cm soil of the Yellow River Delta wetland was about 822.43 mg/kg,which was higher than the average value of total sulfur in world.The difference of total sulfur in soil was significant in the region scale.The contents of total sulfur in soil from high to low was new-born wetlands,degraded wetlands and stable wetlands.For different land use types,the contents of total sulfur in soil from high to low were non-vegetation-covered area,natural vegetation-covered area,farmland and shelter forest area.There was an obvious descending trend of the contents of total sulfur in soil from coastline to inland.In the natural new-born coastal wetlands,the contents of total sulfur in soil tended to decrease from bare tidal flat to river bank.The vertical distributions of the contents of total sulfur in soil showed a high degree of variability.Our results confirmed that the alluvium-deposited sediment and seawater are dominant sources of sulfur in soil in coastal wetlands of the Yellow River Delta,and the human being activities and vegetation were key factors for spatial distribution of sulfur in soil in the study region.
content of total sulfurdistribution characteristicsinfluence factorscoastal wetlandsthe Yellow River Delta
NETL
NSTL
万方数据
维普
