Experiment of afforestation with multiple tree species using solid water was carried out on the wasteland of Longqingxia in Yanqing County, Beijing to select suitable tree species.

• 为进一步选择应用固体水效果较好的树种，为今后困难立地造林树种选择提供参考，于2004年4月在北京市延庆县龙庆峡荒滩进行固体水多树种造林应用试验。