<正>水溶性有机碳（WSOC）是土壤中活跃的C库，在土壤有机质分解转化等过程中有着重要的作用。对武夷山不同海拔植被土壤水溶性有机碳的浓度和紫外一可见光谱进行研究，结果表明：在波长230～665nm间，不同海拔植被土壤水溶性有机物的紫外可见光吸收值均随波长的增加而减小，最大吸收值在230nm处；不同来源的吸光值E240/E420和Ez30/E250存在显著差异，同一海拔不同土层的水溶性有机碳浓度与E220有极显著的线性正相关关系（R为0.819～0.999，P<0.01），据此，可用E230估测武夷山土壤水溶性有机碳的浓度。

The relationship between soils from 6 different parent rocks and the growth of Gleditsia sinensis was studied, using the method of experimental ecology. The results showed that the G. sinensis grew best on the limy dolomite with a 209.3 cm high after three years,but poorly grew on the quartzy sandstone with only a height of 100.6 cm. The difference was 2.08 times, and became more and more obvious with the time change. The principles of growth in diameter and height were consistent, but the extent of change was not as large as the height growth. The difference of height and diameter growth also presented a difference of biomass on these soils. The biomass of G. sinensis at three years old reached 382.61g on the limy dolomite, and the poor was only 170.69g on the quartzy sandstone. It showed a difference of 2.2 times. This result provided the theory basis for forest vegetation restoration and tree selection in Karst region of Guizhou province.