Abstract
Abstract Ammonia volatilization from urea reduces N fertilizer efficiency of crops. Addition of acidic materials to urea may reduce NH 3 volatilization and improve N use efficiency. The objectives of this study were to compare the effects of compacted or blended mixtures of urea and triple superphosphate (TSP), urea and KCl, or urea, TSP, and KCl on NH 3 volatilization and N use efficiency by corn ( Zea mays L.) under a no‐till system. A Ste. Rosalie clay (Typic Humaquept) and an Ormstown silty clay loam (Typic Humaquept) were used with three rates of TSP (0, 26, and 52 kg P ha ‐1 ) and two rates of KCl (0 and 100 kg K ha ‐1 ). Total NH 3 volatilization for 9 d following fertilization ranged from 27 to 31 g kg ‐1 of added urea‐N on the Ste. Rosalie soil and from 50 to 82 g kg ‐1 on the Ormstown soil with urea alone. Ammonia volatilization decreased when TSP, KCl, or both were applied with urea. Nitrogen recovery of added urea, N use efficiency, and corn yields increased with added TSP and KCl. Compacted mixtures of urea with TSP, KCl, or both had an advantage over blended fertilizers in reducing NH 3 volatilization and improving N use efficiency and corn yields.
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Claims 10
Claim · model-written summary
Urea alone volatilized 27 to 31 g kg ‐1 of added urea‐N on Ste. Rosalie soil.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- urea alonee2
- Outcome
- NH 3 volatilizatione0
- Value
- 27 to 31 g kg ‐1e0
- Setting
- Ste. Rosalie soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total NH 3 volatilization for 9 d following fertilization ranged from 27 to 31 g kg ‐1 of added urea‐N on the Ste. Rosalie soil”
e1“corn ( Zea mays L.)”
e2“on the Ormstown soil with urea alone”
Claim · model-written summary
Urea alone volatilized 50 to 82 g kg ‐1 on Ormstown soil.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- urea alonee0
- Outcome
- NH 3 volatilizatione2
- Value
- 50 to 82 g kg ‐1e0
- Setting
- Ormstown soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“from 50 to 82 g kg ‐1 on the Ormstown soil with urea alone”
e1“corn ( Zea mays L.)”
e2“Total NH 3 volatilization for 9 d following fertilization”
Claim · model-written summary
TSP with urea decreased ammonia volatilization.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- TSPe0
- Outcome
- Ammonia volatilizatione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ammonia volatilization decreased when TSP, KCl, or both were applied with urea.”
e1“corn ( Zea mays L.)”
Claim · model-written summary
KCl with urea decreased ammonia volatilization.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- KCle0
- Outcome
- Ammonia volatilizatione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ammonia volatilization decreased when TSP, KCl, or both were applied with urea.”
e1“corn ( Zea mays L.)”
Claim · model-written summary
TSP and KCl together with urea decreased ammonia volatilization.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- TSP, KCl, or bothe0
- Outcome
- Ammonia volatilizatione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ammonia volatilization decreased when TSP, KCl, or both were applied with urea.”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Added TSP and KCl increased nitrogen recovery of urea.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- added TSP and KCle0
- Outcome
- Nitrogen recovery of added ureae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen recovery of added urea, N use efficiency, and corn yields increased with added TSP and KCl.”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Added TSP and KCl increased nitrogen use efficiency.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- added TSP and KCle0
- Outcome
- N use efficiencye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen recovery of added urea, N use efficiency, and corn yields increased with added TSP and KCl.”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Added TSP and KCl increased corn yields.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- added TSP and KCle0
- Outcome
- corn yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen recovery of added urea, N use efficiency, and corn yields increased with added TSP and KCl.”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Compacted mixtures reduced ammonia volatilization more than blended fertilizers.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Compacted mixtures of urea with TSP, KCl, or bothe0
- Outcome
- NH 3 volatilizatione0
- Direction
- reducinge0
- Comparator
- blended fertilizerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compacted mixtures of urea with TSP, KCl, or both had an advantage over blended fertilizers in reducing NH 3 volatilization and improving N use efficiency and corn yields.”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Compacted mixtures improved nitrogen use efficiency and corn yields over blended fertilizers.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Compacted mixtures of urea with TSP, KCl, or bothe0
- Outcome
- N use efficiency and corn yieldse0
- Direction
- improvinge0
- Comparator
- blended fertilizerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compacted mixtures of urea with TSP, KCl, or both had an advantage over blended fertilizers in reducing NH 3 volatilization and improving N use efficiency and corn yields.”
e1“corn ( Zea mays L.)”
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