不同施肥处理对杉木二代生长特征的影响

摘要

在立地条件、造林密度、抚育措施相同的情况下，采用无施肥、施肥两次和施肥3次3种不同处理研究了不同施肥方式对杉木二代幼树地径、树高、根系和生物量空间构型的影响。结果表明：随着施肥次数的增加，杉木二代幼树地径、树高生长量逐渐增大，根深和根幅不断增大，侧根数逐渐增多，单株生物量显著增大。%Based on the same site conditions, planting density and cradle measures,the effects of 3 kinds of different treat- ments including no fertilizer, fertilizer twice and three times on growth characteristics of second--generation of Cunningharnia lanceolata were studied. The results showed that with the increase of the fertilization frequency , the tree height and diameter at ground of second--generation of Cunninghamia lanceolata increased gradually, the root deep and amplitude was continuous- ly increasing, and the number of lateral roots increased gradually, the biomass increased significantly.