<正>太湖水钵富营养化引发的蓝藻暴发与饮用j水源地污染引起了学术界和社会各界的广泛关注，目前，环太湖生态防护林带建设已作为重要的生态修复工程加以实施。笔者综合分析了太湖水质下降的主要原因及面源污杂物来源；综述了国内外有关水岸生态系统结构和功能方面的研究进展，包括生态防护林带控制农业面源污染的机理及影响生态防护林带生态效能的因素等；探讨了水岸带类型、分区与立地条件的划分妖据。水岸生态防护林带营建宽度的确定方法，适宜植物种类选择与配置技术，并提出了建立有效的生态补偿机制等相应对策。

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 O. 819 to 0. 999, P<0. O1). The concentration of water-soluble organic carbon could be estimated using E230.