摘要
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-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E230／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E230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。
Water-soluble organic carbon （WSOC） was as an important component in the transport and supply of carbon （C） to microorganisms and played a major role the cycle of soil organic matter. The concentration and ultraviolet-visible spectroscopic characteristics of soil water-soluble organic carbon among four vegetation types with an elevation gradients in Wuyi Mountain southeastern China were investigated. The results showed that among the wave length of 230-665 mm, the UV - visible spectra absorption value of soil water-soluble organic matter from four vegetation types, with an eleration gradients decreased with wavelength increasing. A peak at about 230 nm was observed in all cases. The E240/E420 and E230/E250 ratios of soil water-soluble organic matter from different sources were significant difference. The concentration of water-soluble organic carbon from the same elevation had a significantly linear and positive correlation with E230（ R from 0. 819 to 0. 999, P 〈 0.01 ）. The concentration of water-soluble organic carbon could be estimated using E230.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第4期23-27,共5页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
国家自然科学基金资助项目(3037025630670313)
关键词
海拔梯度
植被类型
水溶性有机碳
紫外-可见光光谱
武夷山
Elevation gradients
Vegetation types
Water-soluble organic carbon
Ultraviolet-visible absorption spectra
Wuyi Mountain
