Study On The Forms And Distribution Characteristics Of Nitrogen And Phosphorus In The Soil Of Huainan Mining Area

This article studies the Huainan mining area by the characteristics of the shape and distribution of nitrogen and phosphorus in the soil collapse under the influence of mining activities, and analyze the nutrient content of the soil, in order to provide reliable data for the comprehensive utilization of soil collapse. The article combination ArcGIS9.2Geographic Information Systems Spatial Analysis module, use of spatial interpolation method to analysis of nitrogen and phosphorus in the various forms of each of subsidence area as well as organic matter and available potassium in the soil, to draw spatial content distribution. the article also through the correlation analysis study various forms of nitrogen and phosphorus in each of the subsidence area soil characteristics, concluded as follows:1.Yangzhuang collapse area soil TN content between250.36～1301.42mg/kg, between inorganic nitrogen the largest content is NH4+-N,the lowest is NO2--N, TP content between103.58-489.89mg/kg, between the four forms of phosphorus highest content is Ca-P, lowest content is O-P.The distribution characteristics of nitrogen: NO3--N and NO2--N distribution characteristics broadly consistent; broadly consistent with ON and TN distribution; NH4+-N west relative high then east.Phosphorus distribution characteristics:Fe-P distribution of general laws is not obvious, O-P distribution is very uneven, the TP and Al-P and Ca-P have a similar distribution characteristics.2. Panyi collapse area soil TN content between205.62-939.08mg/kg,between inorganic nitrogen the largest content is NH4+-N,the lowest is N02--N, TP content between93.36～393.42mg/kg, between the four forms of phosphorus highest content is Ca-P,the content of Fe-P and O-P is relatively small.The distribution characteristics of nitrogen:NH4+-N have a small deviationin the entire study area, NO3--N and NO2--N distribution characteristics broadly consistent; broadly consistent with ON and TN distribution; Phosphorus distribution characteristics:Al-P content in the entire study area is relatively small, less Ca-P content, Fe-P from the west to the east of the content of progressively increasing, O-P distribution no significant variation, TP distribution is more uniform 3. Paner collapse area soil TN content between234.12～2550.90mg/kg,between inorganic nitrogen the largest content is NH4+-N,the lowest is NO2-N, TP content between113.56-381.62mg/kg, between the four forms of phosphorus lowest content is O-P,other three little difference.The distribution characteristics of nitrogen:NO2--N in the northwest and southeast side relatively high, content of NH4+-N and NO3--N distribution presents a gradually increasing trend from northeast to southwest, TN and ON distribution characteristics broadly consistent. Phosphorus distribution characteristics:In the entire study area, Al-P and Ca-P from the northeast to the southwest content gradually increases, Fe-P general laws are not very obvious, OP from the southwest to the northeast content gradually increasing, the distribution of TP and Al-P has a similar variation.4. Pansan collapse area soil TN content between299.45-1326.12mg/kg,between inorganic nitrogen the largest content is NO3--N,the lowest is NO2--N, TP content between194.52-565.58mg/kg, between the four forms of phosphorus highest content is Ca-P,the lowest is O-P,The distribution characteristics of nitrogen:NH4+-N content gradually from east to west increments, N02--N content in whole area is low, NO3--N from southwest to northeast increase, TN and ON distribution characteristics broadly consistent. phosphorus distribution characteristics:Al-P from the east and west sides collapse waters peripheral increment to the middle collapse of the waters,the distribution of Ca-P and O-P variation is not obvious, the distribution of TP,Al-P, Fe-P have a similar variation.5. Summary of the four kinds of soil nutrients known:Yangzhuang subsidence area, Panyisubsidence area, Paner subsidence area, Pansan subsidence area are all at a medium level of soil nutrients. By correlation analysis known:four subsidence area TN and ON significant correlation, NO3--N and NO2--N correlation better, other forms of nitrogen are weak.in the four study areas TP and Al-P,Fe-Psignificant correlation, others relevant general.