The stem biomass of Pinus in the pure forest was of pyramid shape and the deadwood biomass accounted for 1.75%, but 4.20% in the mixed forest.
纯林中马尾松的干生物量基本上为金字塔形，枯枝生物量所占比例为1.75%，而混交林中为4.20%。
2
Vertical allocation of total biomass and trunk biomass showed a pyramid pattern, but that of branch and leaf biomass distributed mainly in the middle and upper part of the crown.