Abstract:The secretion regulation of pine gum of Chinese pine in deteriorated forest in Taihang mountain area was revealed. The Results show: the pine gumoutput has relations with the temperature in the forest, the DBH, the slopexposure, the dipping wood tapping time and so on. The temperature in theforest and the DBH are both positively correlative with the pine gum output;Using ordinary method, the pine gum output gotten from the shady and semishady slop is 14.7% and 13.9% higher than that from the sunning slop; Thepine gum output per tree using α-NAA is 19. 5% higher than that usingordinary method; The most suitable dipping time is at 7:00-8:00 am in Julyand August.