杉木是我国特有的重要用材树种，其人工林面积和蓄积均占我国造林树种的首位。杉木栽培历史悠久，群众在长期生产实践中积累了丰富经验，但随着时代的发展和栽杉规模的扩大，杉木生产也出现了不少问题，如林分生产力下降、地力衰退及病虫害蔓延等。我国广大林业科技工作者... Cunninghamia lanceolata is an important timber species that is unique to our country. Its area and stock of planted forest occupy the first place among the afforestation species in our country. Cunninghamia lanceolata has a long history of cultivation and the masses have accumulated rich experience in long-term production practices. However, with the development of the times and the expansion of Chinese fir harvest, many problems have emerged in the production of Chinese fir, such as declining productivity, decline of soil fertility and spread of pests and diseases. . China’s vast number of forestry scientists ...