与丙酮萃取液相比，应用Ｎ，Ｎ－二甲基甲酰胺萃取剂测定水体浮游植物叶绿素ａ，具有萃取效率高、所需水样少、不易挥发、温度要求低、适于野外大批量操作等优点，浸泡６－１２ｈ即可萃取完全。介绍了野外养殖木体中的应用方法和结果。 Compared with acetone extract, the phytoplankton chlorophyll a is determined by using N, N-dimethylformamide extractant, which has the advantages of high extraction efficiency, less water requirement, less volatility and low temperature requirement, suitable for field operation in large quantities Etc., soak 6-12h can be extracted completely. Introduced the method and the result of the application in the wild culture wood.