Comprehensive Analysis And Evaluation Of Soil Fertility In Reclamation Area Of Panyi Mine In Huainan

Based on the analysis and summary of relevant literature at home and abroad,this paper chooses the reclamation area of Panji I Mine located in Huainan Mining area of Anhui Province as the research object.Through the investigation of soil and hydrology around the research area,the scope of soil samples in the reclamation area was determined.A total of 60 soil samples were collected in the study area:the contents of pH value,water content,bulk density,organic matter,available potassium,available phosphorus,total nitrogen,total potassium,total phosphorus and alkaline nitrogen in the soil samples were measured in the laboratory,their contents and spatial distribution characteristics were analyzed,and the soil fertility indexes in the reclamation area were described by SPSS 26.0 statistical software.The single factor index method was used to select evaluation indexes,and the five indexes of organic matter,available phosphorus,available potassium,total nitrogen and pH value in reclaimed area were used as evaluation indexes to evaluate soil fertility by using the attribute identification model based on the dead weight,modified Nemerow comprehensive index and AHP-fuzzy comprehensive evaluation.The results showed that the soil fertility in the reclaimed area was above medium level,and the soil should be fertilized appropriately according to the plants planted to enrich the soil fertility.(1)The soil PH value in Pan Ⅰ mining area is mainly alkaline,and the suitable rate of bulk density is tight or above;According to the fertility analysis,the soil organic matter content is grade Ⅳ and below level.The content of available potassium and available phosphorus was grade Ⅲ and medium level.The content of alkali-hydrolyzed nitrogen and total phosphorus was grade Ⅴ,which was deficient.The contents of total nitrogen and total potassium were at the level of Ⅰ.(2)Correlation analysis showed that pH was significantly negatively correlated with bulk density,total nitrogen,available phosphorus,alkali-hydrolyzed nitrogen and total phosphorus,and there was significantly positive correlation among all nutrient factors;According to principal component analysis,the sources of total nitrogen and alkali-hydrolyzable nitrogen in the first principal component may be different from those of other nutrient factors,while the sources of available potassium and total phosphorus are similar.The sources of available potassium and total phosphorus in the second principal component may be different from those of other soil nutrients.(3).Compare the three kinds of comprehensive evaluation method,respectively,using attribute recognition theoretical model,modified in mei luo comprehensive index evaluation method and AHP and fuzzy comprehensive evaluation method of pan soil fertility for processing evaluation,an evaluation results show that the three kinds of evaluation methods of results is consistent,namely the study concluded that a mineral soil fertility pan reached the III middle and above level.Fig.[27] table [32] Ref.[71]...