长白落叶松人工林灌丛生物量的调查与分析

通过对长白落叶松人工林不同密度的成熟林、郁闭前不同阶段的林分及郁闭后不同年龄阶段林分林冠下灌木和草本生物量的研究。结果表明:不同密度的50年生长白落叶松人工林在灌木叶和根方面有显著差异(P<0.050),而在灌木枝、草本地上和地下部分生物量均无显著差异(分别为P=0.151、P=0.640、P=0.162);不同林龄的未郁闭长白落叶松人工林在灌木叶、枝、根和草本地下部分生物量均有显著差异(P<0.010),而在草本地上部分生物量无显著差异(P=0.614);不同林龄的郁闭长白落叶松人工林在灌木叶、枝、根和草本地上部分生物量均有显著差异(P<0.050),而在草本地下部分生物量无显著差异(P=0.468)。给出了长白落叶松人工林灌木叶、枝、根和草本地上部分和地下部分生物量的预测方程。

Biomass of Shrub and Herb Layers in Larix olgensis Plantations

A survey was conducted to study the biomass of shrub and herb layers in mature Larix olgensis plantations with different densities, non-closed stands at different stages and closed stands of different ages. Results show that there are marked differences in leaf biomass and root biomass of shrub in 50-year-old larch plantations with different densities, while there are insignificant differences in branch biomass of shrub, above-ground and underground biomass of herbage. The biomass of leaf, branch and root of shrubs and the underground biomass of herbage in non-closed larch plantations of different ages are significantly different except for the above-ground biomass of herbage. There are significant differences in biomass of leaf, branch and root of shrubs and above-ground biomass of herbage in closed larch plantations of different ages apart from underground biomass of herbage. The prediction equations for biomass of leaf, branch and root of shrub as well as underground and above-ground biomass of herbage in larch plantations are given.