湿地植被生物量测算方法研究进展

湿地植被生物量是衡量湿地生态系统健康状况的重要指标。传统的生物量测算方法主要是通过样方调查，采取收割法等方法；遥感估算法是借助遥感影像某些波段对湿地植被的灵敏反应，再配合典型的样地调查和GPS定位进行。在这两类方法的基础上，均可依据长时间序列的基础资料(实测资料、影像资料等)，建立生物量的计算公式，以便进行类比或预测。笔者在查阅国内外相关文献的基础上，论述了湿地生物量测算方法的研究进展。将传统典型样方调查及实验室分析与遥感估算技术(分光学遥感和雷达遥感)不断融合，不仅可以及时掌控湿地生态系统的动态变化，而且为湿地生态系统生态资产的定量测算提供重要参数，并为湿地生态系统的恢复、重建以及管理提供科学依据。

Progress of Method for Wetland Vegetation Biomass

As an important part of the wetland ecosystem,the wetland vegetation biomass is a key index to weigh the healthiness of the wetland ecosystem.The traditional measuring method and estimating method by remote sensing are reviewed in detail.In the traditional method,several parameters are measured by quadrates.The humid total biomass (HTB) is obtained by the harvest method,and the dry total biomass (DTB) is obtained by the standard drying method.Biomass measurement of wetland vegetation is correlated over growing season to vegetation indices derived from some bands of the remote sensing imagery.However,the typical quadrates investigation and GPS orientation are indispensable.Based on the two methods and long time serial data,the equation for biomass can be established.According to the characteristics of the wetland vegetation biomass,using remote sensing technique associated with the traditional method will be a trend.Using 3S technique to study wetland vegetation biomass can monitor the dynamic change of wetland in real time and provide scientific decision-making supporting for wetland protection.