PROBLEM TO BE SOLVED: To provide a method for cultivating a salt-tolerant grafted tree enabling cultivation of plants having no salt-filtrating function in such an environment as the one in a seacoast by solving the problem that only some environmentally adaptive plants having extremely long roots or salt-filtrating function can grow at the seacoast due to osmotic pressure caused by salt contained in seawater. SOLUTION: This method for cultivating salt-tolerant grafted trees comprises utilizing water conversion function which salt-tolerant plants such as mangrove have, for cultivating other plants so that the plants can grow in the salinity-water environment and thereby a broad seacoast area can be used as agricultural land to produce abundant crops. The method comprises utilizing the water conversion function which salinity-tolerant plants such as mangrove have, so as to enable growth of the plants generally weak in salt in the salinity-water environment and thereby enable plant cultivation in the seacoast land conventionally unavailable as agricultural land. The method enables grafted-tree cultivation in the salinity water environment. COPYRIGHT: (C)2005,JPO&NCIPI
