Abstract
Knowledge of cultivar response to N is helpful to the small grain grower, who can increase yields and profits, and to the small grain breeder, who can manipulate heritable traits to develop cultivars with improved response to N. The objective of this research was to identify morphological and physiological traits influencing grain yield response to N for three oat ( Avena sativa L.) cultivars that differed in height. The cultivars were grown at five rates of N fertilizer (0, 28, 56, 84, and 112 kg N/ha) in each of three environments. ‘Stout’ was relatively short and early‐maturing, while ‘Marathon’ and ‘Lodi’ were taller and later‐maturing. The experimental design was a split plot, with N rates as whole plots and cultivars as subpplots. Stout had the largest grain yield response to N (pattern of change across rates of N) because it had better responses for spikelets per panicle and weight per kernel. Consequently, Stout accumulated more dry matter after heading. Panicle number was not positively associated with differential grain yield response to N. Stout also had thicker, heavier leaves than Lodi and Marathon, but none of the three leaf traits measured appeared to contribute significantly to the differential grain yield response among the cultivars. Determining yield component responses to N could be useful in oat breeding programs that are attempting to release cultivars which respond well to highly productive environments. Lines with favorable responses for one or more yield components should be included in a crossing program for high yield response.
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Claims 9
Claim · model-written summary
Stout was shorter and matured earlier than Marathon and Lodi.
- Taxon
- oat
Avena sativat0 - Material
- Stoute0
- Outcome
- relatively short and early‐maturinge0
- Comparator
- Marathone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Stout’ was relatively short and early‐maturing, while ‘Marathon’ and ‘Lodi’ were taller and later‐maturing”
t0“Oat”
Claim · model-written summary
Stout had the largest grain yield response to nitrogen.
- Taxon
- oatAvena sativat0
- Material
- Stoute0
- Treatment
- Ne0
- Outcome
- grain yield response to Ne0
- Direction
- largeste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stout had the largest grain yield response to N (pattern of change across rates of N) because it had better responses for spikelets per panicle and weight per kernel”
t0“Oat”
Claim · model-written summary
Stout showed a better nitrogen response in spikelets per panicle.
- Taxon
- oatAvena sativat0
- Material
- Stoute1
- Outcome
- spikelets per paniclee0
- Direction
- better responsese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it had better responses for spikelets per panicle and weight per kernel”
t0“Response of Three Oat Cultivars to N Fertilizer1”
e1“‘Stout’ was relatively short and early‐maturing, while ‘Marathon’ and ‘Lodi’ were taller and later‐maturing”
Claim · model-written summary
Stout showed a better nitrogen response in kernel weight.
- Taxon
- oatAvena sativat0
- Outcome
- weight per kernele0
- Direction
- better responsese0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it had better responses for spikelets per panicle and weight per kernel”
t0“Oat”
Claim · model-written summary
Stout accumulated more dry matter after heading.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stout accumulated more dry matter after heading”
t0“Oat”
Claim · model-written summary
Panicle number was not positively associated with differential yield response to nitrogen.
- Taxon
- oatAvena sativat0
- Organ / stage
- Paniclee0
- Outcome
- differential grain yield response to Ne0
- Direction
- not positively associatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Panicle number was not positively associated with differential grain yield response to N”
t0“Oat”
Claim · model-written summary
Stout had thicker and heavier leaves than Lodi and Marathon.
- Taxon
- oatAvena sativat0
- Material
- Stoute0
- Outcome
- thicker, heavier leavese0
- Direction
- thickere0
- Comparator
- Lodi and Marathone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stout also had thicker, heavier leaves than Lodi and Marathon”
t0“Oat”
Claim · model-written summary
None of three leaf traits significantly contributed to differential yield response.
- Taxon
- oatAvena sativat0
- Organ / stage
- leafe0
- Outcome
- differential grain yield responsee0
- Direction
- nonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“none of the three leaf traits measured appeared to contribute significantly to the differential grain yield response among the cultivars”
t0“Oat”
Claim · model-written summary
The authors recommend including lines with favorable yield component responses in crossing programs.
- Taxon
- oatAvena sativat0
- Outcome
- included in a crossing program for high yield responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lines with favorable responses for one or more yield components should be included in a crossing program for high yield response”
t0“Oat”
The same questions in other papers
nitrogen · yield · Avena sativa (oats)Positive and negative results
104 papers in the same direction as this paper · 11 in the opposite direction
- no effect
- positive
- positive
112 papers more in this group
See all 116 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.