1.College of Soil and Water Conservation of Beijing Forestry University,100083,2.Afforestation Department,State Forestry Administration,100714: Beijing;3.Forestry Bureau of Yiyang County,Jiangxi Province,334400,Yiyang,Jiangxi;4.School of Economics and Management of Beijing Forestry University,100083,Beijing;5.No.1 Middle School of Yiyang County,Jiangxi Province,334400,Yiyang,Jiangxi: China