<正>利用遥感数据结合野外调查结果，以混合分类法对从洪泽湖天然湿地2002年8月21日获取的ETM+数据进行分类，并生成2002年分类结果在红光、近红外波段特征空间上的分布图。同时。对1979年的LandsatMSS进行聚类分析，并将聚类结果输出到红光（MSS5）、近红外（MSS7）特征空间图像上，根据MSS的假彩色合成影像、野外调查访问结果和聚类结果在红光、近红外波段特征空间上位置间的相互关系对聚类结果进行标识，将两期遥感图像的分类结果进行叠加，比较了1979～2002年洪泽湖天然湿地变化情况。结果显示，1979～2002年洪泽湖湿地丧失了6458.59hm。，这种丧失与当地对湖泊湿地过度开发及不合理利用密切相关。

In vitro seedling leaves were used as explants to study the shoot inducing and plant regeneration of E. camaldulensis. The inducing rate of the adventitious shoot was 35. 4% when the explants were cultured on medium of MS+0. 8 mg/L BA+0. 3 mg/L KT+0.05 mg/L NAA,but the inducing rate could be stimulated up to 42.9% when medium of MS+0. 8 mg/L BA+0.05 mg/L TDZ+0. 1 mg/L NAA was used. A ten-day darkness culture could improve the adventitious shoot inducing and the explants from more tender leaves were easier to induce the shoots. The shoots with 2～3 cm length were cultured on the rooting medium and the rooting rate of 100% could.be obtained 30 days later. The transplanting rates of rooted shoots were over 80%.