Abstract
The ammonia losses under field conditions vary widely and these nitrogen losses can decrease crops yield. However, experiment with wheat in the Argentinean Pampas showed that yields are not related to the volatilization losses of several nitrogen fertilizers. We hypothesize that ammonia volatilization from urea was compensated with higher apparent soil mineralization rate and then, even with high ammonia volatilization from urea, wheat yields were not affected. We evaluated ammonia volatilization, apparent nitrogen mineralization, apparent nitrogen uptake efficiency, and their effects on wheat yields. The experiment was carried out with wheat grown in a no-till Typic Hapludoll, using urea, UAN and IBDU. Ammonia losses were 17.1% and 4.7% of N applied as urea and UAN, respectively; IBDU and control were low. Wheat yields were not affected by ammonia losses. The N uptake and N export was greater in fertilized treatments. For urea, the highest volatilization rate was compensated by the highest soil mineralization rate. From the sustainable agriculture point of view, the volatilization would be dangerous because the soil could tend to compensate that loss, thus impoverishing itself in native nitrogen.
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Claims 5
Claim · model-written summary
Urea lost 17.1% of applied N as ammonia, compared with 4.7% for UAN.
- Taxon
- wheat
Triticum aestivume2 - Treatment
- ureae1
- Outcome
- Ammonia lossese1
- Direction
- higherinferrede1
- Value
- 17.1%e1
- Qualifier
- 4.7%e1
- Comparator
- UANe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Ammonia losses were 17.1% and 4.7% of N applied as urea and UAN, respectively”
e2“The experiment was carried out with wheat grown in a no-till Typic Hapludoll, using urea, UAN and IBDU”
Claim · model-written summary
UAN lost 4.7% of applied N as ammonia, lower than 17.1% for urea.
- Taxon
- wheatTriticum aestivume2
- Treatment
- UANe1
- Outcome
- Ammonia lossese1
- Direction
- lowerinferrede1
- Value
- 4.7%e1
- Qualifier
- 17.1%e1
- Comparator
- ureae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Ammonia losses were 17.1% and 4.7% of N applied as urea and UAN, respectively”
e2“The experiment was carried out with wheat grown in a no-till Typic Hapludoll, using urea, UAN and IBDU”
Claim · model-written summary
Wheat yields were not affected by ammonia losses.
- Taxon
- wheatTriticum aestivume2
- Treatment
- ammonia lossese3
- Outcome
- Wheat yieldse3
- Direction
- not affectede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The experiment was carried out with wheat grown in a no-till Typic Hapludoll, using urea, UAN and IBDU”
e3“Wheat yields were not affected by ammonia losses”
Claim · model-written summary
N uptake and N export were greater in fertilized treatments.
- Taxon
- wheatTriticum aestivume2
- Treatment
- fertilized treatmentse4
- Outcome
- N uptake and N exporte4
- Direction
- greatere4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The experiment was carried out with wheat grown in a no-till Typic Hapludoll, using urea, UAN and IBDU”
e4“The N uptake and N export was greater in fertilized treatments”
Claim · model-written summary
For urea, the highest ammonia volatilization rate was compensated by the highest soil mineralization rate.
- Taxon
- wheatTriticum aestivume2
- Treatment
- ureae5
- Outcome
- soil mineralization ratee5
- Direction
- higheste5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The experiment was carried out with wheat grown in a no-till Typic Hapludoll, using urea, UAN and IBDU”
e5“For urea, the highest volatilization rate was compensated by the highest soil mineralization rate”
The same questions in other papers
nitrogen · environment: emissions · Triticum aestivum (wheat)Positive and negative results
9 papers in the same direction as this paper · 19 in the opposite direction
- positive
- positive
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See all 29 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.