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黑里河林区位于内蒙古自治区东部宁城县天义镇的西北,是宁城县的西部主要林区。黑里河林场的专业人员,经过多年来的生产实践,摸索了一些切实可行的次生林营林措施,大体上可分抚育间伐、林分改造、采伐利用、封禁保护几种类型:(一)抚育间伐是次生林经营活动中最重要的一个技术环节。次生林抚育的目的是调整种内和种间(组成)、
Located in the northwest of Tianyi Town in Ningcheng County in the eastern part of Inner Mongolia Autonomous Region, Heilihe Forest Area is the major western forest in Ningcheng County. After years of production practice, professionals in Heilihe Forestry Center have explored some practical measures for afforestation in secondary forests. Generally speaking, they can be divided into tending thinning, reforestation, harvesting and utilization, and closure protection types: (1) Tending Thinning is the most important technical link in the management of secondary forest. The purpose of secondary forest tending is to adjust intraspecies and interspecies (composition)