Abstract
Due to the price premium for high-protein wheat (Triticum aestivum L.), many producers are interested in the efficacy of in-crop application of low rates of N fertilizer for increasing grain protein concentration (GPC). We conducted field studies at 26 site-years in Alberta, Saskatchewan and Manitoba from 1998 to 2000 to determine if in-crop application (tillering, boot stage or anthesis) of N fertilizer [broadcast ammonium nitrate (AN) or foliar urea-ammonium-nitrate solution (UAN); 15 kg N ha -1 ] could economically increase GPC of a Canada Western Red Spring (CWRS) wheat cultivar (AC Barrie). Basal N fertilizer rates were 60 and 120 kg N ha -1 . The average increase in GPC due to in-crop N application was 3 g kg -1 . The increase in GPC was similar at basal N rates of 60 and 120 kg N ha -1 . Broadcast AN and foliar-applied UAN were generally equally effective at increasing GPC, but were not more effective than application at the time of seeding. Late application tended to increase GPC more effectively than early application. The increase in GPC due to application of in-crop N was not economic at most sites in this study, but might be greater if applied under more N deficient conditions. Key words: Split N application, foliar, timing
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Claims 6
Claim · model-written summary
In-crop nitrogen increased wheat grain protein concentration by 3 g kg -1 on average.
- Taxon
- spring wheat
Triticum aestivumt0 - Treatment
- in-crop N applicatione0
- Outcome
- GPCe0
- Direction
- increasee0
- Value
- 3 g kg -1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average increase in GPC due to in-crop N application was 3 g kg -1 .”
t0“spring wheat”
Claim · model-written summary
The protein increase was similar at basal nitrogen rates of 60 and 120 kg N ha -1.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- 60e0
- Outcome
- increase in GPCe0
- Direction
- similare0
- Comparator
- 120 kg N ha -1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in GPC was similar at basal N rates of 60 and 120 kg N ha -1 .”
t0“spring wheat”
Claim · model-written summary
Broadcast AN and foliar UAN were generally equally effective at raising grain protein.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- Broadcast ANe0
- Outcome
- GPCe0
- Direction
- equally effectivee0
- Comparator
- foliar-applied UANe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Broadcast AN and foliar-applied UAN were generally equally effective at increasing GPC”
t0“spring wheat”
Claim · model-written summary
In-crop nitrogen applications were not more effective than application at seeding.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- Broadcast AN and foliar-applied UANe1
- Outcome
- GPCe1
- Direction
- not more effectivee0
- Comparator
- application at the time of seedinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but were not more effective than application at the time of seeding.”
e1“Broadcast AN and foliar-applied UAN were generally equally effective at increasing GPC”
t0“spring wheat”
Claim · model-written summary
Late application tended to raise protein more effectively than early application.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- Late applicatione0
- Outcome
- GPCe0
- Direction
- increasee0
- Comparator
- early applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Late application tended to increase GPC more effectively than early application.”
t0“spring wheat”
Claim · model-written summary
In-crop nitrogen protein gains were not economic at most study sites.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- increase in GPCe0
- Direction
- not economice0
- Qualifier
- most sitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in GPC due to application of in-crop N was not economic at most sites in this study”
t0“spring wheat”
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