【摘要】 防护林更新改造技术是防护林经营中的一项重要内容，国内外对其研究还不深入，很多领域有待加强，该文在有关文献的基础上对我国防护林更新改造技术体系进行了总结和评述，为以后有关研究提供依据。更多还原

【Abstract】 The regeneration and alteration technology of protection forest is an important content of the protection forest management, However, the study on the technology at home and abroad is not so deep that many field need to strengthen. Besed on the related documents, this paper gives a summarization and review of the present studies of regeneration and alteration of protection forests for the purpose of further study.更多还原