轮叶百合生物量分配分析

Analysis of Biomass Allocation of Lilium distichum

以针阔混交林下球茎类植物轮叶百合(Lilium distichum)为试材,研究轮叶百合各器官生物量对其生长的影响。结果表明:在整个生长季节中,轮叶百合各器官生物量总体上先增加后减少,在7月末达到最大,8月以后球茎、茎叶和根的生物量不断减少,果实生物量不断增加。各器官生物量分配比的平均值为球茎>茎叶>根>花果,大量物质和能量被分配到地下球茎中(平均43.11%)。6月初,球茎生物量增长速率高于其器官,6月中旬球茎生物量首先出现负增长,8月份以后植株开始枯萎,各器官生物量均出现负增长。球茎、茎叶和根生物量分别与总生物量呈显著的线性正相关关系。以上分析说明,为了适应温带针阔混交林下光照等变化,球茎在轮叶百合整个生长季节中发挥了能量调节库的作用。

Taking Lilium distichum planted in coniferous and broad-leaved mixed forest as material,the effects of biomass of different organs of L. distichum on its growth were studied. The results showed that, total biomass of L. distichum biomass increased to the maximum in July, and then decreased during the growing season. After August bulb biomass, stem and leaf biomass and root biomass declined, yet fruit biomass growed. The average biomass allocation of organs decreased in the order, bulb〉 stem and leaf〉root〉 flower and fruit, which meant a large of material and energy was distributed in underground organ bulb（43. 11%）. In early June,bulb biomass growth rate was higher than other organs, a negative growth rate occurs in mid-June, bulbs carry on energy transfer to ensure the normal growth of plants, after August the plants began to wilt,a negative growth rate occurred in various organs biomass. There were most significant positive correlations between bulb biomass and stem and leaf biomass and root biomass and total biomass, respectively. The results showed that ,in order to adapt light changes under the temperate coniferous and broad-leaved mixed forest, bulbs played an important role in energy regulation and material allocation during L. distichurn life history.