Abstract
The value of oat (Avena sativa L.) for the producer is a function of both grain yield and quality. Therefore, managing nitrogen fertilizer rates to optimize yield while meeting expected grain quality standards is essential in guaranteeing profitable production. To determine the effect of nitrogen fertilization on grain yield and quality, field studies were conducted at Barrhead and St. Albert, AB over a three-year period (2014–2016) to determine responses to four nitrogen fertilizer rates (5, 50, 100, 150 kg ha-1) on five oat cultivars differing widely in agronomic traits. Grain yield, grain quality and β-glucan content of oat were measured. Application of nitrogen fertilizer resulted in a significant increase in grain yield, plant height and lodging score. Grain quality such as test weight and plump kernel decreased with greater nitrogen fertilizer rates. Average β-glucan content differed between cultivars. Optimizing oat yield and quality for high-value markets may be achieved by selecting well adapted cultivars and N fertility rates. The use of the plant growth regulator (PGR) trinexapac-ethyl has been shown to reduce lodging in cereal crops. Plant growth regulators of interest in Canadian cereal cropping systems are intended to restrict plant height and thereby reduce lodging susceptibility. Experiments were conducted over a three-year period (2014–2016) to determine the effect of trinexapac-ethyl application and nitrogen fertilization on yield, lodging and related agronomic responses of oat. The experiment was arranged in a randomized complete block with four replicates. The treatments consisted of four trinexapac-ethyl application rates (0, 70, 100 and 130 g a.i ha-1) and four nitrogen rates (5, 50, 100 and 150 kg ha-1), on the cultivar Stride. Grain yield, plant height, lodging score and grain quality parameters were evaluated. Grain yield was unaffected by applications of trinexapac-ethyl. Plant height was reduced by 5% to 16% with increasing rates of trinexapac-ethyl. PGR application had a significant effect on lodging at two experimental sites, where the severity of lodging was reduced 12% to 31% with high rates PGR application. The rates of nitrogen influenced grain yield, height and lodging. Using PGRs to maintain grain yield and avert lodging are necessary only under conditions where lodging represents a substantial risk.
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Claims 10
Claim · model-written summary
Nitrogen fertilizer increased oat grain yield significantly.
- Taxon
- Oat
Avena sativat0 - Treatment
- nitrogen fertilizere0
- Outcome
- grain yielde0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of nitrogen fertilizer resulted in a significant increase in grain yield, plant height and lodging score.”
t0“Oat”
Claim · model-written summary
Nitrogen fertilizer increased oat plant height significantly.
- Taxon
- OatAvena sativat0
- Treatment
- nitrogen fertilizere0
- Outcome
- plant heighte0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of nitrogen fertilizer resulted in a significant increase in grain yield, plant height and lodging score.”
t0“Oat”
Claim · model-written summary
Nitrogen fertilizer increased oat lodging score significantly.
- Taxon
- OatAvena sativat0
- Treatment
- nitrogen fertilizere0
- Outcome
- lodging scoree0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of nitrogen fertilizer resulted in a significant increase in grain yield, plant height and lodging score.”
t0“Oat”
Claim · model-written summary
Test weight decreased at greater nitrogen fertilizer rates.
- Taxon
- OatAvena sativat0
- Treatment
- greater nitrogen fertilizer ratese0
- Outcome
- test weighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain quality such as test weight and plump kernel decreased with greater nitrogen fertilizer rates.”
t0“Oat”
Claim · model-written summary
Plump kernel decreased at greater nitrogen fertilizer rates.
- Taxon
- OatAvena sativat0
- Treatment
- greater nitrogen fertilizer ratese0
- Outcome
- plump kernele0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain quality such as test weight and plump kernel decreased with greater nitrogen fertilizer rates.”
t0“Oat”
Claim · model-written summary
Average beta glucan content differed among oat cultivars.
- Taxon
- OatAvena sativat0
- Material
- cultivarse0
- Outcome
- β-glucan contente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Average β-glucan content differed between cultivars.”
t0“Oat”
Claim · model-written summary
Trinexapac-ethyl application did not affect grain yield.
- Taxon
- OatAvena sativat0
- Treatment
- applications of trinexapac-ethyle0
- Outcome
- Grain yielde0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield was unaffected by applications of trinexapac-ethyl.”
t0“Oat”
Claim · model-written summary
Increasing trinexapac-ethyl rates reduced plant height by 5% to 16%.
- Taxon
- OatAvena sativat0
- Treatment
- increasing rates of trinexapac-ethyle0
- Outcome
- Plant heighte0
- Direction
- reducede0
- Value
- 5% to 16%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant height was reduced by 5% to 16% with increasing rates of trinexapac-ethyl.”
t0“Oat”
Claim · model-written summary
High PGR rates reduced lodging severity by 12% to 31% at two sites.
- Taxon
- OatAvena sativat0
- Treatment
- high rates PGR applicatione0
- Outcome
- severity of lodginge0
- Direction
- reducede0
- Value
- 12% to 31%e0
- Qualifier
- two experimental sitese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PGR application had a significant effect on lodging at two experimental sites, where the severity of lodging was reduced 12% to 31% with high rates PGR application.”
t0“Oat”
Claim · model-written summary
PGRs are recommended only where lodging presents substantial risk.
- Taxon
- OatAvena sativat0
- Outcome
- Using PGRs to maintain grain yield and avert lodginge0
- Qualifier
- under conditions where lodging represents a substantial riske0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Using PGRs to maintain grain yield and avert lodging are necessary only under conditions where lodging represents a substantial risk.”
t0“Oat”
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