Abstract:

The testing and statistical analysis was made on soil nutrients in vegetation restoration area of Kunyang phosphorite mine.Scientific and rational assessment was made on soil fertility status of the vegetation restoration area.The results showed that soil bulk density was less than 18 g/cm.Soil had plenty of pores,and the structure was good and beneficial to plant growth.Soil organic matter,available P showed high coefficient of variation and uneven distribution;available N,total N,total P,and available K showed the medium variant,and the coefficient of variation were relatively small;total K showed weak in soil variability,and the relative content in the soil was more evenly distributed.Organic matter content of soil samples was deficient,total N and available N content was medium and the relative lack of level,while,contents of total P,available P,total K and available K were rich.The soil fertility of the different study area of vegetation types or recovery modes in combinations of different years were in the order as follows:〖WTBX〗Alnus nepalensis+Cupressus terullsa+Quercus acutissima〖WTBZ〗 community (the vegetation communities restored in 2005)>〖WTBX〗Alnus nepalensis+Cupressus terullsa+Quercus acutissima〖WTBZ〗 community (the vegetation communities restored in 2006)>〖WTBX〗Alnus nepalensis+Cupressus terullsa〖WTBZ〗 community (the vegetation communities restored in 2007)>The soil cover on the platform>〖WTBX〗Alnus nepalensis+Cupressus terullsa〖WTBZ〗 community (the vegetation communities restored in 2005)>〖WTBX〗Alnus nepalensis+Cupressus terullsa+Cupressus lusitanica〖WTBZ〗 community (the vegetation communities restored in 2005