Combination of active ingredients for inhibiting or controlling nitrification

• US 6,066,190 A
• Filed: 01/05/1999
• Issued: 05/23/2000
• Est. Priority Date: 02/21/1994
• Status: Expired due to Fees

• Current Assignee: Skw Stickstoffwerke
• Original Assignee: Skw Stickstoffwerke
• Inventors: Lang, Sieghard, Grabarse, Margrit, Michel, Hans-Jurgen, Wozniak, Hartmut
• Primary Examiner(s): LANGEL, WAYNE A
• Application Number:
  US09/225,772
• Time in Patent Office: 504 Days
• Field of Search: 71/1, 71/11, 71/27, 71/902, 71/903, 71/904
• US Class Current: 71/27
• CPC Class Codes: C05G 3/90 for affecting the nitrification of ammonium compounds or urea in the soil
• CPC Class Codes: Y02P 60/21 Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
• CPC Class Codes: Y10S 71/902 Nitrification inhibition

Abstract

This patent describes nitrification inhibitors characterized by the fact that they contain as their active ingredients 1-hydro-1,2,4-triazole, a substituted 1-hydro-1,2,4-triazole, or their salts or metallic complexes, plus at least one other chemical compound, such as a substituted pyrazole, or its salts or metallic complexes, dicyanodiamide, guanyl thiocarbamide, thiocarbamide, ammonium rhodanide, or ammonium thiosulfate, where said combination exhibit readily recognizable synergetic effects compared to the case where said chemical compounds are employed alone, and thus provide benefits in terms of better efficacies, reduced dosages, and/or cost savings.

Claims

1. A composition for use in inhibiting an contributing the nitrification of ammonium nitrogen in arable soils and substrates, said composition comprising:

a first compound selected from the group consisting of 1H-1,2,4-triazole, substituted 1H-1,2,4-triazole and their salts, and metallic complexes thereof; and

a second compound selected from the group consisting of 3-methylpyrazole, 1-carbamoyl-3-methylpyrazole, 1-guanyl-3-methylpyrazole their salts and metallic complexes thereof,

at a mixing ratio ranging from 25;

1 to 1;

25 by mass of the first to the second compound and producing synergistic efficacy in inhibiting and controlling the nitrification of ammonium nitrogen.

2. A method for inhibiting and controlling the nitrification of ammonium nitrogen in arable soils and substrates, comprising the step of applying to the soil an amount effective therefor of a composition comprising

a first compound selected from the group consisting of 1H-1,2,4-triazole, substituted 1H-1,2,4-triazole and their salts, and metallic complexes thereof;

and,

a second compound selected from the group consisting of dicyanodiamide, guanyl thiocarbamide, thiocarbamide, ammonium rhodanide and ammonium thiosulfate, at a mixing ratio producing synergistic efficacy in inhibiting and controlling the nitrification of ammonium nitrogen and ranging from 1;

1 to 1;

50 by mass of the first to the second compound and in an amount of at least 0.2 percent by weight with respect to a nitrogen content of a fertilizer containing at least one component selected from the group consisting of ammonium and amide.

3. A composition for use in inhibiting and controlling the nitrification of ammonium nitrogen in arable soils and substrates, and composition comprising:

2 to 34% by weight of a first compound selected from the group consisting of 1H-1,2,4-triazole, substituted 1H-1,2,4-triazole and their salts, and metallic complexes thereof;

2 to 34% by weight of a second compound selected from the group consisting of 3-methyl pyrazole, substituted 3-methylpyrazole and their salts and metallic complexes thereof; and

33 to 96% by weight of a third compound selected from the group consisting of dicyanodiamide, guanyl thiocarbamide, thiocarbamide, ammonium rhodanide and ammonium thiosulfate.