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为实现科学造林,提高造林质量,加速平原区农田防护林建设,进行造林调查规划设计是今后林业生产发展的趋势。现就规划设计中的几个主要环节归纳总结如下: 一、外业调查前首先要编好“三表”,即立地条件类型表、造林类型表和经营措施类型表。 编制“三表”是调查规划设计的基础工作,为外业小班调查和规划设计提供依据;同时也是以往造林生产经验和现有资料,数据的综合分析、概括和应用。编制立地条件类型表要根据野外调查材料和土壤普查成果,经过整
In order to achieve afforestation science, improve afforestation quality and accelerate the construction of farmland shelterbelt in plain area, the planning and design of afforestation investigation is the trend of forestry production in the future. Now on the planning and design of several major links summarized as follows: First, the field survey before the first series of “three tables”, that is, site conditions type list, afforestation type list and business type list. The preparation of the “three tables” is the basic work of survey planning and design, which provides the basis for the investigation and planning design of small-scale enterprises in the field; it is also the comprehensive analysis, generalization and application of the past experience of afforestation production and the existing data and data. The establishment of site conditions type table according to the field survey materials and soil census results, after the whole