Effects of reforestation on soil chemical properties and microbial communities in a severely degraded sub-tropical red soil region. - GONG Xia; NIU De-kui; ZHAO Xiao-rui; LU Sun-bao; LIU Yuan-qiu; WEI Xiao-hua; GUO Xiao-min (Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2013)