经营单位级的森林多功能监测体系研究

Multifunctional monitoring system for forest at management unit level

【目的】研究经营单位级的森林多功能监测体系,为森林经营单位及时掌握多功能森林的生长发育状态、内部结构特征、更新演替规律及其与所处环境间的相互关系提供有效手段,进而为其森林多功能经营提供数据支撑和理论指导。【方法】以中国林业科学研究院热带林业试验中心森林为研究对象,从抽样体系设计、样地布设方法、调查因子设置及观测指标数据采集等方面对森林多功能监测技术进行系统介绍和实践操作。【结果】基于1km×1km网格抽样框架,通过二重系统抽样,采用群状圆形样地方式,布设一重样地和二重样地,建立了经营单位级的森林多功能监测体系。实践操作结果表明,采用该监测体系调查一个样地所需费用与我国森林资源连续清查所需费用相当,但工作量仅约为后者的1/3,其中对热带林业实验中心森林蓄积量的抽样精度为94.97%,说明抽样效率较高。【结论】建立的经营单位级森林标多功能该监测体系实用性强,监测效率高,对森林经营单位开展森林多功能经营及森林多功能综合监测具有指导意义。

[Objective] This study aimed to establish effective means for forest management unit to timely know the growth and development state, internal structure characteristics, regeneration and succession regular of multifunctional forest and the relationship between it and the environment, which would provide data support and theoretical guidance for management of multifunctional forests. [Method] Taking the experimental center of tropical forestry of the Chinese Academy of Forestry as an example, the multifunctional monitoring system of forest was introduced from the sampling system design to plots layout method,investigation factor set and observation data collection. [Result] Through taking two systematic samplings and the cluster of circular shape plots, a multifunctional monitoring system for forest at management unit level was established. The system only took 1/3 workload compared to the national continuous forest inventory with equal cost. The sampling accuracy was excellent with 94.97% when applied to the forest volume in the experimental center at tropical forestry. [Conclusion] The established monitoring systern has strong practicability and high monitoring efficiency, and can guide the forest business units for multifunction management.