Abstract
Nitrogen is the most required and complex management element in maize crop, promoting the highest responses in crop yield. The objective of this work was to verify the effect of different N sources on topdressing in minimum tillage and conventional tillage systems on the agronomic performance of the Pioneer 32R22YHR single cross and on the severity of common rust disease. Two experiments were carried out in a randomized block design (DBC) in the 2013/14 crop in minimum tillage and conventional tillage systems. The treatments were: control without nitrogen, ammonium sulfate, urea, ammonium nitrate, a physical mixture of nitrate (70%) and ammonium sulfate (30%) and a chemical mixture of these same sources in the same proportion just explained. Nitrogen sources had no significant effect on plant height, ear insertion height, ear prolificacy, grain yield and leaf severity of common rust, regardless of the sowing system. Under conventional tillage, the plants presented higher plant height, ear insertion and grain yield. There was no effect of sowing systems on prolificacy. With the exception of nitrogen free treatment, for all others, the severity of common rust was higher in minimum tillage system.
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Claims 7
Claim · model-written summary
Nitrogen sources had no significant effect on plant height, ear insertion height, and prolificacy.
- Treatment
- Nitrogen sourcese0
- Outcome
- plant height, ear insertion height, ear prolificacye0
- Direction
- no significant effecte0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen sources had no significant effect on plant height, ear insertion height, ear prolificacy, grain yield and leaf severity of common rust”
t0“maize”
Claim · model-written summary
Nitrogen sources had no significant effect on maize grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen sources had no significant effect on plant height, ear insertion height, ear prolificacy, grain yield and leaf severity of common rust”
t0“maize”
Claim · model-written summary
Nitrogen sources had no significant effect on common rust severity.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen sources had no significant effect on plant height, ear insertion height, ear prolificacy, grain yield and leaf severity of common rust”
t0“maize”
Claim · model-written summary
Conventional tillage yielded higher plant height and ear insertion.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under conventional tillage, the plants presented higher plant height, ear insertion and grain yield”
t0“maize”
Claim · model-written summary
Conventional tillage yielded higher grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under conventional tillage, the plants presented higher plant height, ear insertion and grain yield”
t0“maize”
Claim · model-written summary
Sowing system had no effect on prolificacy.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no effect of sowing systems on prolificacy”
t0“maize”
Claim · model-written summary
Common rust severity was higher under minimum tillage for nitrogen treatments other than nitrogen-free.
- Treatment
- minimum tillage systeme0
- Outcome
- severity of common ruste0
- Direction
- highere0
- Qualifier
- With the exception of nitrogen free treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the exception of nitrogen free treatment, for all others, the severity of common rust was higher in minimum tillage system”
t0“maize”
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