A Study On The Differences In Soil Fertility With Different Reclamation Mode At Haizhou Opencast Mine Wasteland

In the paper,it divided the reclamation vegetation into five types: enclosed area, whiteelm pure forest, robinia pseudoacacia and pure forest with white elm mixed forest, notenclosed area by surveying the vegetation growth condition of haizhou open-pit coalmine dump, and on the basis of the reclamation fixed number of years and vegetationgrowth condition of haizhou open-pit coal mine dump. We have sampled the soil ofdifferent reclamation vegetation type then respectively test the organic matter, total N,available N, total P, available P, total K, available K and soil moisture content of thesamples.By pluging the nutrient element index in the membership degree of membershipfunction and using the factor analysis method in this paper, we found out the soilfertility main control factors and worked out the weight. Then pluged the measurementindicators in the physical model, the analysis results showed thatthe seasonal variationof soil water content in five reclamation mode of haizhou open-pit coal mine dumpchanged strongly. The Ⅰ abundant, Ⅱ slightly abundant, Ⅲ medium,Ⅳ slightly lack,Ⅴlack of the study area soil were15%,29.375%,13.75%,6.25%and35.625%respectively by The matter-element model analysis. Although the percentage of Ⅴlacknutrition level was the biggest, it had very marked improvement compared to thebackground level. The soil nutrient element content of the research area increasedsignificantly except the rapid available phosphorus and total phosphorus, especially thecontent of rapid available phosphorus and total phosphorus in robinia pure forest wasthe largest, followed by mixed forest> white yulin area> enclosed area> not enclosedarea,and this showed that the nitrogen fixation of black locust pure forest was obviousthen it could obviously increase the nitrogen element of reclaimed soil. The soil nutrientof Herbaceous plant reclamation mode, not enclosed area and enclosed area,significantly smaller than the tree reclamation mode, it showed that reclamation fixednumber of year and reclamation ways had obvious effects on the results of reclamation.The results of black locust pure forest region reclamation mode was obvious than theother forest region reclamation modes, and the matter-element model analysis resultsshowed that the soil nutrient levels were in Ⅰ abundance and abundance Ⅱ slightly,showing that the reclamation mode had good result on soil improvement.