PHYTO-REMEDIATION TECHNOLOGY USING SEA WATER IRRIGATION

摘要

PROBLEM TO BE SOLVED: To provide a phyto-remediation technology effective for suppressing the salt concentration below a specific level to enable the planting of salt- resistant plants and prevent the desertification by carrying out the irrigation with sea water under a specific condition. SOLUTION: Irrigation with sea water is carried out in flooded state. Salt- resistant plants can be planted on the land irrigated with sea water by the above method. The salt concentration in the soil is lowered to =4% by the realistic quantity of water supply by the leaching effect (wash-out of salt by a large amount of irrigation water) caused by the irrigation with sea water to obtain soil having salt concentration comparable to that of the supplied water. The effective salt-resistant plants are e.g. Phoenix dacylifera and others distributed over ten orders such as order Liliiflorae.