杉木〔cunnghama lanceolata (lama.) Hook.〕是我国亚热带地区特有的优良用材树种,南方各省(区),在丘陵地区广泛栽培,但是,杉木为针叶树种,枯枝落叶量少,含有营养元素不多,分解缓慢,自肥能力低,难以维持养分循环的平衡;一般栽杉的经营强度大,耗水耗肥多,林产品收获时带走的养分也多;南方丘陵地区降水集中,强度大,水土流失严重;这些地区气候温暖,常有季节性干旱,林木病虫害多。因此,丘陵地区集中成片营造杉木纯林有可能导致地力衰退,生产力下降和生态平衡失调的不良后果。如何有效地建立 Cunninghamia lanceolata (lama.) Hook. Is an excellent timber species unique to the subtropical regions of China. Southern provinces (regions) are widely cultivated in hilly areas. However, Chinese fir is a conifer species with low litterfall and no nutrient elements More decomposition of slow, self-fertility is low, it is difficult to maintain the balance of nutrient cycling; general planted cedar business intensity, water consumption and more fertilizer, forest products when harvesting more nutrients; precipitation concentrated in southern hilly areas, Severe water and soil erosion; these areas have a warm climate, often seasonal drought, forest pests and diseases and more. Therefore, the concentration of a piece of hilly areas to create a pure Chinese fir forest may lead to decline in productivity, productivity and ecological balance disorders adverse consequences. How to build it effectively