不同年龄马尾松林能量及空间分布特征

对三明市尤溪县不同年龄马尾松林能量特征进行研究。结果表明,马尾松林不同器官间能量现存量存在差异,表现为树干>枝叶>树根;随着林龄的增大,马尾松人工林生物量与能量现存量逐渐增大,其中就马尾松林各器官而言,树干生物量与能量现存量所占的比例随着年龄增大而降低,而枝叶和树根生物量与能量现存量随着年龄增大而增大;就马尾松林各林层而言,乔木层和林下植物层能量现存量表现出随着林龄增大而增大的趋势,而凋落物层能量现存量则表现为34年生的比26和42年生的高。

Energy storage and distribution in Pinus massoniana plantations at different ages

The energy storage and distribution of Pinus massoniana plantations at different ages(26,34 and 42 years) were investigated in Youxi County of Sanming City.In the plantation at the same age,the different organs of P.massoniana had different energy,ranked in the order of trunk>leaf>root.The amount of biomass and energy storage of P.massoniana increased with the age.As to the different organs of P.massoniana,the proportion of stem biomass and energy storage decreased with the age,but those of branches and roots increased with the age.As to the layers of P.massoniana,energy storage of arbor layer and undergrowth increased with the age,but the energy storage of litter fall of 34-year-old was higher than that of the other two ages.