Ammonium nitrogen
The nitrogen content in the form of ammonium (NH 4 + ) is referred to as ammonium nitrogen . For nitrogen fertilizers in agriculture and in wastewater treatment , the proportion of ammonium nitrogen is specified.
In agriculture, nitrogenous fertilizers are used, also in the form of liquid manure (general farm manure ). These farm fertilizers contain nitrogen partly as ammonium compounds ( ammonium nitrate , ammonium phosphate ) and partly as nitrate ( calcium nitrate in blue grain ), but often also in the form of organic nitrogen compounds ( proteins , amines , urea ). With the help of bacteria, nitrification creates nitrate (NO 3 - ) from ammonium ions (NH 4 + ) via the intermediate stage nitrite (NO 2 - ) in the soil , which can be absorbed by the plants. The organically bound nitrogen can be mineralized in the soil [release of ammonium nitrogen (ammonium compounds) and ultimately also nitrate] or enter the soil humus supply, from which it is only gradually mineralized again (usually 1% to 3% doubling per year).
See also
Individual evidence
- ↑ A. Amberger, K. Vilsmeier, R. Gutser: Nitrogen fractions of various slurry and their effect in plant experiments . In: Journal for Plant Nutrition and Soil Science . tape 145 , no. 4 , 1982, pp. 325–336 , doi : 10.1002 / jpln.19821450403 ( PDF ). PDF ( Memento of the original from March 5, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ ammonium. In: wasser-wissen.de. Retrieved September 17, 2015 .
- ^ Günter Vollmer, Manfred Franz: Chemical products in everyday life . Georg Thieme, Stuttgart 1985, ISBN 3-13-670201-8 , p. 349.
