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通过对南平溪后29年生杉木林不同连栽代数林林下植被生物量、营养元素及养分循环的研究．结果表明：3代杉木林林下植被总生物量、草本生物量、灌木层生物量均高于2代的和1代的。林下植被层的N、P2O5、K2O、Fe、Mn、Cu、Zn营养元素含量均随连栽代数增加而下降：同一林分林下植被层中,草本层上述各营养元素含量高于灌木层的。不同栽杉代数林下植被营养元素积累量大小顺序均为N＞K2O＞CaO,MgO＞P2O5,Mn＞Fe＞Zn＞Cu。随栽杉代数增加,林下植被年吸收量、年归还量增加;而各营养元素循环速率最大为2代的,其次是3代的,1代的则最低。
Through the study on the biomass, nutrient elements and nutrient cycling of subsoil vegetation in 29-year-old Chinese fir plantation with different plantation successions in Nanping River. The results showed that the total biomass, herb biomass and shrub biomass of understory vegetation in the 3rd generation of Chinese fir were higher than those of the 2nd and 1st generation. The contents of N, P2O5, K2O, Fe, Mn, Cu and Zn nutrients in understory vegetation layer decreased with the increase of continuous planting alluviality. Among the undergrowth vegetation layer of the same forest, the contents of above nutrients in the herb layer were higher than those in the shrub layer of. The accumulations of nutrient elements in undergrowth vegetation of different cultivars were N> K2O> CaO, MgO> P2O5, Mn> Fe> Zn> Cu. The annual uptake of understory vegetation increased with the increase of fir algebra, while the maximum nutrient cycling rate was second generation, followed by third generation, and lowest in first generation.