Abstract
ABSTRACT High grain yield with adequate protein concentration is an important goal for spring wheat ( Triticum aestivum L.) production. A field experiment conducted at two sites representing sandy loam and clay loam soils in Ottawa during 2003 and 2004 examined the effects of planting date and nitrogen (N) management on grain yield and grain protein concentration (GPC) in spring wheat. Cultivar AC Brio was planted at three dates at about 10 d intervals starting from the last week of April. Five N treatments were 0, 60, and 100 kg N ha −1 applied as preplant, 60+40 (preplant + topdress at boot stage), and 60 + 40 kg N ha −1 (preplant + foliar spray at boot stage). Both planting date and N had significant effects on grain yield and GPC. When planting was delayed beyond mid‐May, grain yield was reduced by 15 to 45% in three out of four site‐years. However, GPC increased by 6 to 17% in all late planting dates than the early plantings. Grain yields were increased with N application, but there was no benefit due to split N application as topdress or foliar spray than a single application at 100 kg N ha −1 Regardless of application method, GPC was greater with 100 kg N ha −1 than with 0 or 60 kg ha −1 , and GPC was more responsive to applied N in a sandy loam soil than in the clay loam soil. Results of this study suggest that it is likely to achieve the target GPC in spring wheat without a significant reduction in grain yield if wheat is planted before the middle of May, especially in clay loam soil.
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Claims 8
Claim · model-written summary
Planting date and nitrogen significantly affected grain yield and grain protein concentration.
- Taxon
- spring wheat
Triticum aestivumt0 - Treatment
- planting date and Ne0
- Outcome
- grain yield and GPCe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both planting date and N had significant effects on grain yield and GPC”
t0“Spring Wheat”
Claim · model-written summary
Planting after mid-May reduced grain yield by 15 to 45% in three of four site-years.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- planting was delayed beyond mid‐Maye0
- Outcome
- grain yielde0
- Direction
- reducede0
- Value
- 15 to 45%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When planting was delayed beyond mid‐May, grain yield was reduced by 15 to 45% in three out of four site‐years”
t0“Spring Wheat”
Claim · model-written summary
Late planting increased grain protein concentration by 6 to 17%.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- late planting datese0
- Outcome
- GPCe0
- Direction
- increasede0
- Value
- 6 to 17%e0
- Comparator
- early plantingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GPC increased by 6 to 17% in all late planting dates than the early plantings”
t0“Spring Wheat”
Claim · model-written summary
Nitrogen application increased grain yield.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- N applicatione0
- Outcome
- Grain yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yields were increased with N application”
t0“Spring Wheat”
Claim · model-written summary
Split nitrogen topdressing or foliar spraying gave no yield benefit over one 100 kg N ha−1 application.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- split N application as topdress or foliar spraye0
- Outcome
- no benefite0
- Direction
- no benefite0
- Comparator
- a single application at 100 kg N ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no benefit due to split N application as topdress or foliar spray than a single application at 100 kg N ha −1”
t0“Spring Wheat”
Claim · model-written summary
Grain protein concentration was greater with 100 kg N ha−1 than with 0 or 60 kg ha−1.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- 100 kg N ha −1e0
- Outcome
- GPCe0
- Direction
- greatere0
- Comparator
- 0 or 60 kg ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GPC was greater with 100 kg N ha −1 than with 0 or 60 kg ha −1”
t0“Spring Wheat”
Claim · model-written summary
Grain protein concentration responded more to applied nitrogen in sandy loam than clay loam.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- applied Ne0
- Outcome
- GPCe0
- Direction
- more responsivee0
- Comparator
- clay loam soile0
- Setting
- sandy loam soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GPC was more responsive to applied N in a sandy loam soil than in the clay loam soil”
t0“Spring Wheat”
Claim · model-written summary
Planting before mid-May, especially on clay loam, may achieve target grain protein without a significant yield loss.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- planted before the middle of Maye0
- Outcome
- achieve the target GPC in spring wheat without a significant reduction in grain yielde0
- Setting
- clay loam soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it is likely to achieve the target GPC in spring wheat without a significant reduction in grain yield if wheat is planted before the middle of May, especially in clay loam soil”
t0“Spring Wheat”
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