通过对国家造林项目杉木、湿地松不同立地条件、密度林分生长状况的研究，从林分连年生长量、郁闭度、标准密度、平均枝下高、被压木株数全面分析了林分的生长过程，提出了杉木、湿地松合理的间伐时间和强度，为及时调整项目造林模型提供科学依据，并为森林资源发展和保护项目实施提供借鉴 Through the research on the growth conditions of different stands and density stand of Chinese fir plantations and Chinese pine plantations, this paper analyzed the stand types of stands in terms of successive annual growth, canopy density, standard density, average branch height and number of pressed woods The reasonable time and intensity of thinning of Chinese fir and Slash pine were proposed in order to provide scientific basis for adjusting the afforestation model of the project in time and provide reference for the development of forest resources and the implementation of the protection project