北京林业大学2015年研究生课程廸设项目编号YWKC15013;北京林业大学青年教师科学研究中长期项目编号2015ZCQ-SW-02;国家自然科学基金项目编号J1103516;北京林业大学教改项目编号bjfubio2014资助@@@@[Supported by the 2015 Beijing Forestry University Graduate Course Development ProjectYWKC15013;the Medium and Long Scientific Research Project for Young Teachers in Beijing Forestry University2015ZCQ-SW-02;the National Natural Science Foundation of ChinaJ1103516;the Education Reform Project of Beijing Forestry University No. bjfubio2014]