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Ammonium Nitrate Vs Urea: Reference

The document compares the effects of ammonium nitrate and urea as nitrogen fertilizers. It discusses four key points: 1) The fungal community composition changes more when using ammonium nitrate compared to urea, especially at higher application rates. 2) Uptake of nitrate by phytoplankton is higher (33%) than uptake of urea (16%). 3) Ammonia volatilization losses are lowest for urea (3.9-12.0%) compared to ammonium sulfate (13.6-19.5%) and ammonium nitrate (4.4-6.4%). Increased ammonia can contribute to acid rain and smog

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46 views2 pages

Ammonium Nitrate Vs Urea: Reference

The document compares the effects of ammonium nitrate and urea as nitrogen fertilizers. It discusses four key points: 1) The fungal community composition changes more when using ammonium nitrate compared to urea, especially at higher application rates. 2) Uptake of nitrate by phytoplankton is higher (33%) than uptake of urea (16%). 3) Ammonia volatilization losses are lowest for urea (3.9-12.0%) compared to ammonium sulfate (13.6-19.5%) and ammonium nitrate (4.4-6.4%). Increased ammonia can contribute to acid rain and smog

Uploaded by

mjunaid
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© © All Rights Reserved
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AMMONIUM NITRATE VS UREA

1) To change specie composition


Nitrogen fcrtilizcrs arc commonly applied in Swcdcn in order to incrcasc the stcmwood production of low
productivity coniferous forests. As well as increasing tree growth and litter production.
An excess accumulation of carbon in the forest floor has also been found, probably as a consequence of
this reduced microbial activity. One way to clucidate this is to study possible changes in the composition
of the microbial community.
It has been shown that fungal fruitbody production changes after forest fertilization. The changes in
species composition were most evident at the highest rate of application, 600 kg N ha −1, especially when
NH4NO3 was used as a fertilizer.

Reference: Arnebrant, K., Bååth, E., & Söderström, B. (1990). Changes in


microfungal community structure after fertilization of scots pine forest soil with
ammonium nitrate or urea. Soil Biology and Biochemistry, 22(3), 309–312. 
2) Uptake rate
Uptake rates of nitrate(33%) is more than uptake rate of urea(16%)

Reference: Twomey, L. J., Piehler, M. F., & Paerl, H. W.


(2005). Phytoplankton uptake of ammonium, nitrate and urea in the Neuse
River Estuary, NC, USA. Hydrobiologia, 533(1-3), 123–134.

3) Ammonia volatilization
Total NH3 losses from AS, AN, and urea varied from 13.6–19.5%, 4.4–
6.4%, and 3.9–12.0% depending on the compounds and their levels added
to nitrogen (N) fertilizers, respectively. Ammonia loss increase the
deficiency of nitrogen contents to plant. Environmentally, increasing concentrations of
NH3 in the atmosphere can cause an aerosol formation of the complex sulphates of NH3 that are
components of smog and acid rain
Reference: Gezgin, S., & Bayrakll, F. (1995). Ammonia volatilization
from ammonium sulphate, ammonium nitrate, and urea surface applied
to winter wheat on a calcareous soil. Journal of Plant Nutrition, 18(11),
2483–2494.

4) Comparison of urea and ammonium nitrate as nitrogen sources for


potatoes

Russet Burbank and Kennebec cultivars in 12 experiments over 4 years at


rates of 0, 67, 135, and 202 kg N/ha. Compared to ammonium nitrate:
total yield was reduced by urea in 6 of the 12 experiments, with an
average reduction of 3.3 t/ha at the 202 kg N/ha,
Reference: Sanderson, J. B., & White, R. P. (1987). Comparison of urea
and ammonium nitrate as nitrogen sources for potatoes. American
Potato Journal, 64(4), 165–176.

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