厦门14种主要树种吸收硫及固碳能力

对厦门市14种主要树种吸硫强度以及不同环境(清洁环境和污染环境)对其固碳能力的影响进行研究。结果表明:不同树种叶片的吸硫强度在0.04~1.73 mg/g。单位绿地面积不同树种净化SO2量为8.84~1 513.05kg/(hm2·a),其中天竺桂最大,其次为黄槿、芒果和刺桐,洋紫荆最小。多数树种在污染环境下单位绿地面积年固碳量受到明显抑制,如大叶榕、高山榕、小叶榕和印度紫檀等树种。然而还有些树种其固碳能力在污染环境下受到促进,如鸡冠刺桐、夹竹桃和小叶榄仁,表明这些树种对污染环境有较强的适应能力。综上所述,夹竹桃、小叶榄仁和天竺桂等树种既能吸收相当数量的硫,同时其固碳能力未受到削弱,表明这些树种是适宜在污染环境下种植的树种。

Ability Absorbing Sulfur and Fixing Carbon of 14 Main Tree Species in Xiamen City

The intensity absorbing sulfur and the ability fixing carbon were studied on 14 main tree species in some polluted and non-polluted areas in Xiamen City, separately. The result showed that the intensity absorbing sulfur among different tree species was 0.04 - 1.73 rag/g. The SO2 purification among different tree species in per unit of green space area was 8.84 - l 513.05 kg/（hm2 · a）. Among which, the maximum value occurred in Cinnamomum pedunculatum, followed by Hibiscus tiliaceus, Mangifera indica and Erythrina variegate, while the minimum was in Bauhinia blakeana. For most trees （e. g. , Ficus virens, Ficus altissima, Ficus microcarpa and Pterocarpus indicus ） , their amount of annual carbon fixation per unit of green area was obviously suppressed in a polluted environment. However, the annual carbon fixation of several tree species was stimulated, such as Erythrina crista-galli, Nerium indicum and Terminalia mantaly, it showed that these tree species had nice adaptation. Overall, these tree species of Nerium indicum Mill, Terminalia mantaly and Cinnamomum pedunculatum could absorb certain quantity of sulfur without weakening their ability for carbon fixation, indicating that these tree species were suitable to grow in a polluted environment.