Iron-supplemented fertilizer
Compositions of a slow-release nitrogen-containing fertilizer and iron chelated to an aminopolycarboxylic acid or a polycarboxylic acid. The composition can be useful as a fertilizer for rapid greening of turfgrass.
1. A liquid fertilizer composition comprising:
(a) a slow-release nitrogen-containing fertilizer;
(b) a fast-release nitrogen-containing fertilizer; and
(c) iron chelated to an aminopolycarboxylic acid or a polycarboxylic acid;
wherein the liquid fertilizer composition does not include potassium.
2. The liquid fertilizer composition of claim 1 , wherein the slow-release nitrogen-containing fertilizer is selected from the group consisting of triazone, urea-triazone, a urea formaldehyde reaction product, isobutylidene-diurea, and a combination thereof.
3. The liquid fertilizer composition of claim 1 , wherein the slow-release nitrogen-containing fertilizer comprises urea-triazone.
4. The liquid fertilizer composition of claim 1 , comprising iron chelated to an aminopolycarboxylic acid, and wherein the aminopolycarboxylic acid comprises one or more of ethylenediamine tetraacetic acid (EDTA); diethylenetriamine pentaacetic acid (DTPA); N-(2-hydroxyethyl)ethylenediamine triacetic acid (HEDTA); cyclohexane-1,2-diamine tetraacetic acid (CDTA); ethylenediamine-N,N′-bis(o-hydroxyphenylacetic acid (o,o-EDDHA); ethylenediamine-N-(o-hydroxyphenylacetic)-N′-(p-hydroxyphenylacetic) acid (o,p-EDDHA); ethylenediamine-N,N′-bis(2-hydroxy-4-methylphenylacetic) acid (EDDHMA); ethylenediamine-N,N′-bis(5-carboxy-2-hydroxyphenylacetic) acid (EDDCHA); ethyl enedi amine-N,N′-bi s(2-hydroxy-5-sulfophenylacetic) acid (EDDHS A); N,N′-bis(2-hydroxyphenyl)ethylendiamine-N,N′-diacetic acid (HBED); or ethylenediamine-N,N′-disuccinic acid (EDDS).
5. The liquid fertilizer composition of claim 1 , comprising iron chelated to an aminopolycarboxylic acid and wherein the aminopolycarboxylic acid comprises six or more coordination bonds.
6. The liquid fertilizer composition of claim 1 , comprising iron chelated to an aminopolycarboxylic acid, and wherein the aminopolycarboxylic acid comprises diethylenetriamine pentaacetic acid (DTPA).
7. The liquid fertilizer composition of claim 1 , comprising iron chelated to a polycarboxylic acid and wherein the polycarboxylic acid comprises one or more of citric acid, oxalic acid, succinic acid, malonic acid, or tartaric acid.
8. The liquid fertilizer composition of claim 1 , wherein the pH of the liquid fertilizer composition comprises a pH of about 8 to about 9.
9. The liquid fertilizer composition of claim 1 , wherein the liquid fertilizer composition is contained in a spray bottle.
10. The liquid fertilizer composition of claim 1 , wherein the slow-release nitrogen-containing fertilizer comprises from about 1% to about 99% nitrogen by weight.
11. The liquid fertilizer composition of claim 1 , wherein the slow-release nitrogen-containing fertilizer comprises from about 20% to about 70% nitrogen by weight.
12. The liquid fertilizer composition of claim 1 comprises from about 0.1% to about 10% of elemental iron by weight.
13. The liquid fertilizer composition of claim 1 comprises from about 1% to about 40% of the iron chelated to an aminopolycarboxylic acid or polycarboxylic acid by weight.
14. The liquid fertilizer composition of claim 1 , wherein the fast-release nitrogen-containing fertilizer comprises one or more of urea, urea ammonium nitrate, ammonium, or nitrate.
15. The liquid fertilizer composition of claim 1 , wherein the fast-release nitrogen-containing fertilizer comprises from about 1% to about 99% nitrogen by weight.
16. The liquid fertilizer composition of claim 1 , wherein the fast-release nitrogen-containing fertilizer comprises from about 20% to about 50% nitrogen by weight.
17. A method of fertilizing plants comprising: applying the liquid fertilizer composition of claim 1 to plants.
18. A method of greening turfgrass comprising:
supplying the liquid fertilizer composition of claim 1 ; and
applying the liquid fertilizer composition to turfgrass to cause greening in about 3 days or less,
wherein greening is an increase in the dark green color index value of the turfgrass as compared to turfgrass not treated with the liquid fertilizer composition.
19. A liquid fertilizer composition consisting of:
(a) a slow-release nitrogen-containing fertilizer, wherein the slow-release nitrogen-containing fertilizer is selected from the group consisting of triazone, urea-triazone, isobutylidene-diurea, and a combination thereof;
(b) a fast-release nitrogen-containing fertilizer;
(c) iron chelated to an aminopolycarboxylic acid or a polycarboxylic acid; and
(d) optionally water.