落叶松人工林伐前更新的试验党常顺，李严寒，曹文龙，罗刚（黑龙江省林科院江山娇实验林场）落叶松是黑龙江省主要造林树种，早期营造的林分大部分正达到或接近成热，进入更新期，如何缩短这部分森林的更新期和选择适宜的更新树种，是保持森林持续发展的重要技术关键。１... Larix plantation trial before the reformation Dang Changshun, Li Yanhan, Cao Wenlong, Luo Gang (Heilongjiang Academy of Forestry Branch Jiangshan Jiao Experimental Forest) Larch is the main afforestation species in Heilongjiang Province, most of the early construction of the stands are reaching or Nearly into heat, into the renewal period, how to shorten the renewal of this part of the forest and choose the appropriate replacement species, is to maintain the sustainable development of forests is an important technical key. 1 ...