基于LDA模型的中国林业技术政策演进分析OA

Forestry technology policy functions as a critical governance instrument for directing forestry scientific and technological innovation,optimizing resource allocation and facilitating the transformation of scientific and technological achievements.Using 368 forestry technology policy documents issued by National Forestry and Grassland Administration from 2001 to 2025 as research samples,this paper introduces the theory of government attention allocation into the study of forestry technology policies.It applies the Latent Dirichlet Allocation(LDA)topic model to quantify the government's attention allocation in the field of forestry technology,and employs the Sankey diagram of theme evolution to examine the structural changes of such attention allocation in content dimensions.From the perspective of long-term time-series policy texts,this study elucidates the theme evolution path and transformation logic of forestry technology policies.The results demonstrate that:(1)China's forestry technology policy has evolved through three distinct phases:the foundation construction and norm establishment period(2001-2009),the deepening reform and engineering project-driven period(2010-2017),and the systematic governance and sustainable development transformation period(2018-2025).(2)Government attention allocation exhibits a clear dynamic evolutionary pattern:initially dominated by the dual themes of"supervision of wild animals and forest tree seeds and seedlings"and"forestry projects and forest tenure transfer management",then shifted to a pattern centered around"protected natural areas and forest land conservation and management",and finally evolved into a multi-thematic coordinated development landscape.(3)Three cross-stage core evolution paths are identified,namely afforestation engineering technology,ecological supervision technology and forestry management technology.Government attention has shifted from foundational standardization andprocess control to systematic governance,and the change in the focus of government attention is highly synchronized with the implementation of major national strategies.This paper reveals the transformation law of forestry technology policies from factor management to systematic governance,and verifies the core driving role of government attention allocation in policy change.Policy implications:establish a closed-loop feedback mechanism for dynamic policy adaptation,build a cross-domain coordinated allocation mechanism for attention,iteratively upgrade the technical system along core evolution paths,and strengthen the core driving role of scientific and technological innovation,so as to provide data-evidence-based decision-making references for optimizing the forestry technology policy system in the new era and enhancing the effectiveness of forestry technology governance.