Abstract: To cultivate iodine-enriched forest vegetables in the mountainous regions of northeast China, a series of iodine application experiments were conducted.Iodine fertilizer (potassium iodide, KI) was added to the forest soils supporting a variety of wild-vegetable plants, with a dosage gradient of 1.00,3.33,10.00, 16.67 and 50.00 mg· kg^-1.The results showed that iodine application was an effective approach to obtain iodine-rich vegetable materials, and the iodine contents in treated plants could be 2～40 times higher than control.But, the residual of added iodine in soil was generally not high, only occupying 40%～5% of the application dosage.The accumulation of iodine in plants did not consistently increase with the dosage, which tended to slow down when the application amount increased to 10.00 mg·kg^-1.In a comprehensive consideration of soil iodine residual, plant iodine accumulation and application cost, the proper iodine dosage should be approximately 10 mg·kg^-1.Soil conditions had significant influence on the efficiency of iodine application, and the cultivated lands should be chosen at fine-textured, fertile, and upper-sloped sites, while sandy soils and down-sloped sites were unfavorable to the preservation of added iodine and to plant absorption.

Key words: Forest soil, Exogenous iodine, Iodine-enriched wild vegetables