湖南省百人计划112-0991;中南林业科技大学博士科研基金0490016;中南林业科技大学青年基金QJ201512。This work was supported by the One-Hundred-Talents Scheme of Hunan ProvinceGrant 112-0991;the Doctoral Scientiifc Research Foun-dation of Central South University of Forestry and TechnologyGrant 0490016;Youth Foundation of Central South University of Forestry and TechnologyGrant QJ201512