Combinations of active ingredients for inhibiting or controlling nitrification

• US 5,951,736 A
• Filed: 08/13/1996
• Issued: 09/14/1999
• Est. Priority Date: 02/21/1994
• Status: Expired due to Term

• Current Assignee: SKW Stickstoffwerke Piesteritz GmbH (Ameropa Holding AG)
• Original Assignee: SKW Stickstoffwerke Piesteritz GmbH (Ameropa Holding AG)
• Inventors: Michel, Hans-Jurgen, Wozniak, Hartmut, Lang, Sieghard, Grabarse, Margrit
• Primary Examiner(s): LANGEL, WAYNE A
• Application Number:
  US08/693,141
• Time in Patent Office: 1,127 Days
• Field of Search: 71/902, 71/1, 71/11, 71/27, 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 combinations 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 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:

1 to 35% 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;

1 to 80% by weight of dicyanodiamide,

10 to 98% by weight of a third compound selected from the group consisting of guanyl thiocarbamide, thiocarbamide, ammonium rhodanide and ammonium thiosulfate,

applied in an amount from 0.2 to 4 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.

2. The method of claim 1 wherein the composition is administered at a dosage of at least 0.5 kg per hectare.

3. In combination,

1 to 35% 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;

1 to 80% by weight of dicyanodiamide, and

10 to 98% by weight of a third compound which is selected from the group consisting of guanyl thiocarbamide, thiocarbamide, ammonium rhodanide and ammonium thiosulfate, applied in an amount from 0.2 to 4 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, for use in inhibiting and controlling the nitrification of ammonium nitrogen in arable soils and substrates.