广西优良用材林资源培育重点实验室开放课题1480101;广西科技计划项目桂科AB16380300;广西林业科技项目桂林科字[2014]02号资助 This work was supported by the Open Research Fund of Guangxi Key Laboratory of Superior Timber Trees Cultivation1480101;the Guangxi Science and Technology Plan ProjectAB16380300;the Guangxi Forestry Science and Technology Project[2014] 02