DE2745833

New agents for inhibiting or regulating nitrification of ammonium nitrogen in culture media contain as active ingredient >=1-acyl-pyrazole of formula (I). In (I), R' and R3 are H, halogen, opt. substd. alkyl or aryl, and R2 is H, halogen, alkyl or NO2. When R' and/or R3 is/are H or alky...

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Main Authors JUMAR, ALFRED., DDR 3010 MAGDEBURG, DD, LANG, SIEGHARD., DDR 7101 CUNNERSDORF, DD, GROSS, MANFRED., DDR 3010 MAGDEBURG, DD, HELD, PAUL., DDR 3010 MAGDEBURG, DD, GEILHUFE, ADELHEID, DDR 4090 HALLE-NEUSTADT, DD, HARTBRICH, HANS-JOACHIM, DDR 4020 HALLE, DD, KLEPEL, MANFRED., DDR 3010 MAGDEBURG, DD, WALTER, RUDI, DDR 4090 HALLE-NEUSTADT, DD, ACKERMANN, HEINZ.HABIL, DDR 1505 BERGHOLZ-REHBRUECKE, DD, KAESTNER, GERD, DDR 3010 MAGDEBURG, DD
Format Patent
LanguageEnglish
Published 16.10.1986
Edition4
Subjects
CHEMISTRY
FERTILISERS
FERTILISERS CHARACTERISED BY THEIR FORM
HETEROCYCLIC COMPOUNDS
MANUFACTURE THEREOF
METALLURGY
MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05
MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS
ORGANIC CHEMISTRY
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Summary:New agents for inhibiting or regulating nitrification of ammonium nitrogen in culture media contain as active ingredient >=1-acyl-pyrazole of formula (I). In (I), R' and R3 are H, halogen, opt. substd. alkyl or aryl, and R2 is H, halogen, alkyl or NO2. When R' and/or R3 is/are H or alkyl, then R4 is opt. substd. alkyl, alkenyl, aryl, opt. substd. aryloxy, alkylmercapto or arylamino and X is O or S. When R' and/or R3 is/are halogen or aryl, then R4 is opt. substd. alkyl, alkenyl, aryl, opt. substd. alkoxy, aryloxy, alkylmercapto, arylmercapto, or amino opt. substd. by alkyl and/or aryl, and X is O or S. The alkyl and aryl residues may be substd. by halogen, CN, COOH, alkoxycarbonyl, NO2, OH, alkoxy, aryloxy, amino (in turn opt. substd. by alkyl and/or aryl, or acyl), alkyl or aryl. Used to prevent nitrification of ammonium nitrogen (esp. that added in fertilisers) in order to minimise loss of nitrogen by leaching out of the more soluble nitrate nitrogen formed by the nitrification process. This gives improved utilisation of nitrogen added in fertillisers and reduces nitrate pollution of ground waters. (I) have adequate water-solubility and are non-volatile. Their stability ensures prolonged action. Activity is evident with low concens. of (I).
Bibliography:Application Number: DE19772745833