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基于多年防护林经营研究与实践 ,在分析防护林经营目的的基础上 ,提出了防护林阶段定向经营理论基础 .以防护林的防护成熟为核心 ,将防护林经营阶段划分为成熟前期 ,即从栽植后形成相对稳定的幼林到初始防护成熟龄 ;防护成熟期 ,防护成熟状态持续的时期 ,即从初始防护成熟龄到终止防护成熟龄 ;更新期 ,林木接近自然成熟开始更新直到更新结束并形成相对稳定的幼林 .防护林经营的定向是指在任何经营阶段内 ,一切经营技术与措施都是为了使防护林向着成熟的状态发展 ,即防护成熟是防护林经营的方向 ,是最终目的 .为尽量维持防护林的成熟状态并使防护效益不间断 ,针对发育正常与低质衰退的林分 ,在各个经营阶段内采取相应的系列经营管理与改造措施 .
Based on the research and practice of shelterbelt management for many years, based on the analysis of management purpose of shelterbelt, this paper put forward the theoretical basis of directional management in shelterbelt. Taking the protection of shelterbelt as the core, the shelterbelt management stage is divided into the pre-mature stage, that is, Of young forest to the initial protective maturity; protective maturity, protective maturity duration, that is, from the initial protective maturity to the end of protective maturity; renewal period, trees close to natural maturity began to update until the end of the update and the formation of relatively stable young forest. The orientation of shelterbelt management means that in any stage of management, all management techniques and measures are intended to develop the shelterbelt toward a mature state, that is, the protective maturation is the direction of the shelterbelt management and the ultimate goal. In order to maintain the mature state of the shelterbelt as far as possible Protection of uninterrupted benefits, for the development of normal and low-quality recession in the various stages of management to take the appropriate series of management and renovation measures.