Abstract
Abstract Preplant nitrogen (N) application, which involves placing nutrients in the soil before seeding, has been an integral part of crop production systems for decades. Some producers are known to apply N at least 21 d before planting. This may increase N loss and lower grain yield. This study evaluated the effect of timing and rate of N application on winter wheat ( Triticum aestivum L.) grain yield and N use efficiency (NUE). An experiment with a factorial arrangement of treatments was set up in a randomized complete block design with three replications. Treatments included four N rates (0, 45, 90, and 135 kg ha –1 ) with each applied 7 or 30 d before planting, and at Feekes 5 (FK 5 ). Grain N was analyzed using LECO CN dry combustion analyzer. The difference method [Grain N from (fertilized plot – check plot)]/N applied was used to compute NUE. Nitrogen application rate significantly affected grain yield ( P ≤ .01). Although the rate may be temporally and spatially variable, approximately 90 kg N ha –1 was required to obtain yields that differ markedly from the check. Mid‐season applied N (FK 5 ) had similar yields to preplant applied N in two of four site‐years and significantly increased yield at one site in 2020. Out of two sites, the timing of N application had a substantial effect on NUE in both years ( P ≤ 0.11). In this case, NUE was increased by as much as 9.5% for midseason applied N compared to 30 d before planting N application time.
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Claims 6
Claim · model-written summary
Nitrogen rate significantly affected grain yield.
- Taxon
- winter wheat
Triticum aestivumt0 - Treatment
- Nitrogen application ratee0
- Outcome
- grain yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen application rate significantly affected grain yield ( P ≤ .01)”
t0“winter wheat”
Claim · model-written summary
About 90 kg N ha –1 gave markedly different yields from the check.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- 90 kg N ha –1e0
- Outcome
- yieldse0
- Comparator
- checke0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“approximately 90 kg N ha –1 was required to obtain yields that differ markedly from the check”
t0“winter wheat”
Claim · model-written summary
Midseason nitrogen gave similar yield to preplant nitrogen in two of four site years.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- Mid‐season applied N (FK 5 )e0
- Outcome
- yieldse0
- Direction
- similare0
- Qualifier
- two of four site‐yearse0
- Comparator
- preplant applied Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mid‐season applied N (FK 5 ) had similar yields to preplant applied N in two of four site‐years”
t0“winter wheat”
Claim · model-written summary
Midseason nitrogen significantly increased yield at one site in 2020.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- Mid‐season applied N (FK 5 )e1
- Outcome
- yielde0
- Direction
- increasede0
- Qualifier
- one site in 2020e0
- Comparator
- preplant applied Ne1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significantly increased yield at one site in 2020”
t0“winter wheat”
e1“Mid‐season applied N (FK 5 ) had similar yields to preplant applied N”
Claim · model-written summary
Timing had a substantial effect on nitrogen use efficiency at both sites in both years.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- timing of N applicatione0
- Outcome
- NUEe0
- Qualifier
- both yearse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the timing of N application had a substantial effect on NUE in both years ( P ≤ 0.11)”
t0“winter wheat”
Claim · model-written summary
Midseason application increased NUE up to 9.5% against application 30 days before planting.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- midseason applied Ne0
- Outcome
- NUEe0
- Direction
- increasede0
- Value
- 9.5%e0
- Comparator
- 30 d before planting N application timee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NUE was increased by as much as 9.5% for midseason applied N compared to 30 d before planting N application time”
t0“winter wheat”
The same questions in other papers
nitrogen · nutrient: efficiency · Triticum aestivum (wheat)Results differ
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- positive
- positive
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1,736 papers in the same direction as this paper · 285 in the opposite direction · 39 reporting no difference from an alternative
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See all 2,061 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.