| 摘要 |
A fertilizer composition for supplying plants with nutrient iron containing as an active ingredient at least prussiate of the formula <IMAGE> (I) in which M represents an alkali metal ion, alkaline earth metal ion, heavy metal ion or ammonium ion or a proton, R1, R2, R3 and R4, independently of one another, each represent hydrogen, alkyl, hydroxyalkyl, cycloalkyl, optionally substituted aryl or aralkyl or R1, together with R2, and/or R3, together with R4, represent an alkylene group, a bis-alkylene ether group or a bis-alkylene thioether group or, together with the adjacent nitrogen atom, form an unsaturated heterocyclic ring, or R2 and R4 each represent hydrogen, alkyl or hydroxyalkyl and at the same time R1 and R3 together represent an alkylene group, X represents an alkylene group, hydroxyalkylene group, cycloalkylene group, bis-alkylenecycloalkylene group, bis-alkylene ether group, tris-alkylene diether group, bis-alkylene thioether group or bis-alkyleneamino group, A REPRESENTS 1 OR 2 AND B REPRESENTS 1, 2, 3, OR 4. |
