Xin Ran1, Shenqi Qiao1, Yu Zhang1, Xiaokuan Gao2, Yuewei Du1, Bingxiang Liu1,3*, Changming Ma1 and Hongxiang Mu1 1Department of Forest Cultivation, College of Forestry, Hebei Agricultural University, Baoding, China 2College of Life Science, Hengshui University, Hengshui, Hebei, China 3Hebei Urban Forest Health Technology Innovation Center, Baoding, China Background: The implementation of the Millennium Forestry Plan was accompanied by growth discomfort exhibiting varying degrees of symptoms...