Abstract
Urea pastillation is a technology that allows the composite mixture with other elements like sulfur and zinc. This study aimed to provide recommendations of N rates, and to assess the agronomic performance of N fertilizers, including pastille urea and its composition associated with S and Zn, top-dressed on maize. Two experiments were set up in the harvests of 2014 and 2015 in an Acrisol and a Lixisol. The experimental design was the randomized blocks with three replicates in a split-plot arrangement and an additional treatment (no N). In the plot, three N applications rates were tested (75, 150 and 300 kg ha-1); while in the subplots, seven fertilizers were tested, including conventional and pastilled ones. The greater was the N rate applied, the higher were the leaf N content and grain yield of maize. The S content in the leaves increased with the increasing S doses applied with the tested fertilizers. Yields with ammonium sulfate were higher than with prilled urea, pastille urea and pastille urea with elemental S in the harvest mean on the Haplic Lixisol. The rate that corresponded to the maximum economic efficiency for UR was 128 and 119 kg N ha-1 for Haplic Acrisol and Haplic Lixisol, respectively. The recommended dose of ammonium sulfate was 119 kg ha-1, since it provided the greater incomes for both sites.
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Claims 9
Claim · model-written summary
Higher N rate increased maize leaf N content.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The greater was the N rate applied, the higher were the leaf N content and grain yield of maize.”
Claim · model-written summary
Higher N rate increased maize grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The greater was the N rate applied, the higher were the leaf N content and grain yield of maize.”
Claim · model-written summary
Increasing applied S doses increased leaf S content.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The S content in the leaves increased with the increasing S doses applied with the tested fertilizers.”
t0“maize”
Claim · model-written summary
Ammonium sulfate produced higher yields than prilled urea on Haplic Lixisol.
- Treatment
- ammonium sulfatee0
- Outcome
- Yieldse0
- Direction
- highere0
- Comparator
- prilled ureae0
- Setting
- Haplic Lixisole0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields with ammonium sulfate were higher than with prilled urea, pastille urea and pastille urea with elemental S in the harvest mean on the Haplic Lixisol.”
t0“maize”
Claim · model-written summary
Ammonium sulfate produced higher yields than pastille urea on Haplic Lixisol.
- Treatment
- ammonium sulfatee0
- Outcome
- Yieldse0
- Direction
- highere0
- Comparator
- pastille ureae0
- Setting
- Haplic Lixisole0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields with ammonium sulfate were higher than with prilled urea, pastille urea and pastille urea with elemental S in the harvest mean on the Haplic Lixisol.”
t0“maize”
Claim · model-written summary
Ammonium sulfate produced higher yields than pastille urea with elemental S on Haplic Lixisol.
- Treatment
- ammonium sulfatee0
- Outcome
- Yieldse0
- Direction
- highere0
- Comparator
- pastille urea with elemental Se0
- Setting
- Haplic Lixisole0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields with ammonium sulfate were higher than with prilled urea, pastille urea and pastille urea with elemental S in the harvest mean on the Haplic Lixisol.”
t0“maize”
Claim · model-written summary
The N rate for maximum economic efficiency of UR was 128 kg N ha-1 on Haplic Acrisol.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate that corresponded to the maximum economic efficiency for UR was 128 and 119 kg N ha-1 for Haplic Acrisol and Haplic Lixisol, respectively.”
t0“maize”
Claim · model-written summary
The N rate for maximum economic efficiency of UR was 119 kg N ha-1 on Haplic Lixisol.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate that corresponded to the maximum economic efficiency for UR was 128 and 119 kg N ha-1 for Haplic Acrisol and Haplic Lixisol, respectively.”
t0“maize”
Claim · model-written summary
The authors recommend 119 kg ha-1 ammonium sulfate because it gave greater income at both sites.
- Outcome
- recommended dose of ammonium sulfatee0
- Value
- 119 kg ha-1e0
- Qualifier
- greater incomes for both sitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The recommended dose of ammonium sulfate was 119 kg ha-1, since it provided the greater incomes for both sites.”
t0“maize”
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- no effect
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See all 2,185 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.