Nitrification inhibitors ‐ Interaction with applied ammonium concentration

Autor:	Jena Glasscock, Josef Hagin, Abraham Shaviv
Rok vydání:	1995
Předmět:	inorganic chemicals Ammonium sulfate Nitrapyrin Physiology Chemistry Inorganic chemistry chemistry.chemical_element Nitrogen Field capacity chemistry.chemical_compound Animal science Loam Soil water Nitrification Ammonium Agronomy and Crop Science
Zdroj:	Journal of Plant Nutrition. 18:105-116
ISSN:	1532-4087 0190-4167
DOI:	10.1080/01904169509364888
Popis:	Soil samples of 50 g clay, clay loam and sandy loam were amended with ammonium sulphate giving 25, 50, 100, 200, and 400 mg nitrogen (N)/kg and with two nitrification inhibitors, Dicyandiamide (DCD) and N‐Serve (N‐S) each at two levels calculated relative to the N applied, 1 and 5%, and 0.5 and 1%, respectively. Water was added to moisture field capacity and the samples were incubated at 30°C for 7, 14, 28, and 56 days, each treatment and timing in three replicates. The lower level of application of nitrification inhibitors was not effective. Nitrate‐N (NO3‐N) recovery peaked at 28 days and did not change appreciably later, except the 1% N‐S treatments where a flush of NO3 appeared at the 56th sampling day. The nitrification inhibitory effects of the two inhibitors were enhanced at the 200 and 400 mg/kg ammonium‐N (NH4‐N) application in all three soils. Nitrification inhibition was not related to salt concentrations as measured by electrical conductivity.
Databáze:	OpenAIRE
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