通过对全国杉木中心产区不同发育阶段杉木人工林生长及生物量的调查 ,研究轮伐期对杉木人工林生物量及养分分布规律的影响 ,结果表明 :不同轮伐期经营的杉木林林分生物量及其养分分配规律存在明显差异 ,随年龄阶段的提高 ,杉木枝、叶、根、边材及林冠所占比例逐年下降 ,干、皮和心材比例逐年增加 ,边材 /心材及林冠 /树干比例下降 ,轮伐期越短 ,每采伐单位杉木干物质所带走的养分越多 ,对地力的消耗越严重 ;同时短轮伐期还造成采伐、炼山及整地对林地的干扰频率增加 ,并不利于杉木林下植被发育 ,因此轮伐期是影响杉木人工林地力的重要因素 ,今后确定杉木轮伐期应考虑杉木的生态成熟龄 ,适当延长轮伐期 ,给林地以一定的养分生态恢复周期 ,减缓人工林经营对林地的压力 Through the investigation of the growth and biomass of Chinese fir plantation at different developmental stages, the effects of different rotation stages on the biomass and nutrient distribution of Chinese fir plantation were studied. The results showed that the rotation of Chinese fir plantation With the increase of age, the proportion of branches, leaves, roots, sapwood and canopy decreased year by year, and the proportion of stem, skin and heartwood increased year by year. The proportion of sapwood / heartwood and canopy / The proportion of tree trunk decreased, the shorter the rotation period, the more nutrients were removed from the dry matter of fir plant per harvesting unit, the more serious the ground power consumption was. At the same time, the frequency of disturbance caused by cutting, , Is not conducive to the development of understory vegetation, therefore, rotation is an important factor affecting the productivity of Cunninghamia lanceolata plantation in the future to determine the rotation of Chinese fir should take into account the ecological maturity, appropriate extension of rotation period, to the woodland to a certain nutrient Ecological restoration cycle, slow down the pressure of plantation management on forest land