抚育间伐是在密度较大的郁闭森林群体中,通过伐去一部分林木来调节保留木的营养空间,改善它们的生态环境,促进其生理活动和生长过程,以缩短成材期,提高林分的产量和质量,并可提供间伐材经济收入,对多快好省地建设速生、丰产、优质的新型用材林基地有着重要意义。解放后至1976年止,全国营造成林的用材林面积约2.8亿亩, Tending thinning is in dense canopy forests, through the removal of part of the trees to regulate the conservation of wood nutrition space, improve their ecological environment, and promote their physiological activities and growth processes, in order to shorten the growing period and improve the stand Yield and quality, and provide the economic income of thinning timber. It is of great significance to construct a new type of timber forest base that is fast, productive and high-quality, so that it will be able to build a faster and more economical province. After liberation until 1976, the national afforestation forest area of ​​about 280 million mu,