德国异龄混交林恒续经营的经验和技术

１９９３年９－１０月中国森林资源监控和技术开发培育训团赴德国巴登－符腾堡州和巴伐利亚州进行了为期１个月的学习和考察。本文根据各考察点林业局局长的口述和赠送资料进行了汇总、译编,着重介绍异龄混交林的经营方法。

German Experience and Technology in Sustainable Managment of Uneven-Aged Mixed Forests

The mode of management of normal forests over a century has been abandoned.Now most of even aged forests are transformed into uneven aged mixed sustainable forests,according to the principle of "nature-approximating forestryw".In September-October,1993,the China Training Delegation on Forest Resources Monitoring and Technological Development went to Baden-Wunttenberg and Bayern in Federal Gernamy to make investigation in 12 forest bureaus.This paper makes an introduction to the experience and technological work in establishing uneven_aged mixed sustainable forests by 6 Forest Bureaus where site types differ greatly.Emphasis is placed on a new forest culture method adopted by all forest bureaus "directively controlled culture of target trees".The primary rule is:in a stand 250 target trees/ha with plant spacing about 8 m are selected.Selection is limited to target trees-But the forest bureau is allowed flexible exercise of the rule in tree selection according to particular conditions.