中文摘要：

在实验室条件下对泡桐花粉进行热处理、酸处理、碱处理。观察发现，泡桐花粉十分耐酸、碱和高温。用蒸馏水煮沸花粉混合液1～10h，花粉几乎无变化；用5％氢氧化钠溶液煮沸泡桐花粉1～5小时，部分花粉外壁变得略为粗糙。用30％和40％的氢氧化钠溶液对其煮沸达3小时，个别花粉壁轻微破裂；用50％硫酸溶液煮沸泡桐花粉达3小时，镜下观察一少部分花粉碳化变黑，个别花粉壁破坏。整个实验中几乎没有花粉壁破坏严重，观察到的极个别破坏程度较大的花粉也不能断定是上述处理造成的。花粉的破坏和蚀变机理有待进一步研究。

英文摘要：

Pollen grains and spores are very important index to reconstruct paleoclimate and paleoenvironment. However, even though in strata of the same age, contents of pollen grains and spores have great difference in different locations or from different sediments. One of the important reasons is that pollen grains and spores sediment un- der the different condition of alkalescence,acidity treat. The experiment of pollen preservation show that the Paulownia pollen grains have no any changes after boiling in the water for 1 - 5 hours, the destroy effect is not obvious, only several pollen grains turned black and were damaged after being boiled in the 30% or 40% NaOH solution for 3 hours, but little more pollen grains were turned black and damaged after being boiled in the 50% sulfuric acid solution for 1 -3 hours, showing heavy acid has stronger destruction than alkali. However, it was only the experiments of pollen destruction boiled in NaOH or sulfuric acid solution for several hours, more studies should be carried out in the future.