Abstract
Foliar N applications on wheat ( Triticum aestivum L.) have increased grain protein. Foliar N timing evaluations have been minimal. The objectives were (i) determine the optimal timing of foliar N for increased grain protein of hard red winter wheat (HRWW) and spring wheat (HRSW), (ii) evaluate effect of foliar N on grain yield, and (iii) determine relationship of grain protein to foliar N application and grain yield. Foliar N was applied at Feekes stage 10.0 (boot) or 10.8 (postpollination) on two cultivars of HRWW and HRSW each year from 1995 to 2000. The foliar N rate (33.7 kg N ha −1 ) was applied as 1:1 solution of urea ammonium nitrate (UAN) and water. Fertilizer N for a 3360 kg ha −1 grain yield goal was broadcast as UAN after planting. Soil type was Estelline silt loam (fine‐silty over sandy or sandy‐skeletal, mixed, superactive, frigid Calcic Hapludoll). Postpollination foliar N gave the highest grain protein during all years. Grain yield was significantly reduced 5% by boot stage foliar N for HRSW. Neither timing application significantly reduced HRWW grain yield. All wheat data were pooled to relate grain yield level and protein response to foliar N. Grain protein and yield from plots without foliar N were inversely related ( r 2 = 0.57). Postpollination foliar N increased protein 70% of the time when yield goal was exceeded compared with only 23% when it was not. These results show that postpollination foliar N gave higher grain protein and was most effective when planned yield goal was exceeded.
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Claims 5
Claim · model-written summary
Postpollination foliar N gave the highest wheat grain protein in all years.
- Taxon
- Wheat
Triticum aestivumt0 - Treatment
- Postpollination foliar Ne0
- Outcome
- grain proteine0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Postpollination foliar N gave the highest grain protein during all years”
Claim · model-written summary
Boot-stage foliar N significantly reduced grain yield of hard red spring wheat by 5%.
- Taxon
- Spring WheatTriticum aestivumt0
- Treatment
- boot stage foliar Ne0
- Outcome
- Grain yielde0
- Direction
- reducede0
- Value
- 5%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Wheat”
e0“Grain yield was significantly reduced 5% by boot stage foliar N for HRSW”
Claim · model-written summary
Neither foliar N timing significantly reduced grain yield of hard red winter wheat.
- Taxon
- Hard Red Wintert0
- Treatment
- timing applicatione0
- Outcome
- HRWW grain yielde0
- Direction
- no_changeinferrede0
Not reportedComparator
Verbatim
t0“Hard Red Winter”
e0“Neither timing application significantly reduced HRWW grain yield”
Claim · model-written summary
In wheat plots without foliar N, grain protein and grain yield were inversely related (r2 = 0.57).
- Taxon
- WheatTriticum aestivumt0
- Outcome
- Grain proteine0
- Direction
- inversely relatede0
- Value
- r 2 = 0.57e0
- Comparator
- plots without foliar Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Grain protein and yield from plots without foliar N were inversely related ( r 2 = 0.57)”
Claim · model-written summary
Postpollination foliar N increased grain protein 70% of the time when the yield goal was exceeded, compared with only 23% of the time when it was not.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Postpollination foliar Ne0
- Outcome
- proteine0
- Direction
- increasede0
- Value
- 70%e0
- Qualifier
- when yield goal was exceedede0
- Comparator
- when it was note0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Postpollination foliar N increased protein 70% of the time when yield goal was exceeded compared with only 23% when it was not”
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See all 877 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.