Under the low potassium solution and soil cultures conditions,capability of enrichment in potassium of 16 different genotypes in genus Houttuynia Thunb.were screened by comparing the potassium contents,potassium uptakes and utilization ratios,and the morphology characters of root.H.cordata was cultured under low and normal potassium solution conditions,the result showed that the genotype of H.emeiensis Z.Y.Zhu et S.L.Zhang(W01-86),H.cordata(W01-34 and W01-71) had high capability of enrichment in potassium,t...