Abstract
In cereals, N provided to the developing grains comes from continued N uptake and assimilation after anthesis and from the retranslocation of previously accumulated vegetative N. This study investigated management and cultivar effects on post‐heading N uptake and their relationship with total plant and grain N accumulation and grain protein concentration (GPC). Twenty six‐rowed spring barley ( Hordeum vulgare L.) cultivars were grown on a Chateauguay clay soil (fine loamy, mixed nonacid, frigid, Typic Hapludalf) in 1988 under conventional management (recommended N, no fungicide or growth regulator) and on a Bearbrook clay soil (very fine silty, mixed nonacid, frigid, Humaquept) in 1989 and 1990 under conventional and intensive (high N, fungicide and plant growth regulator) managements. Postheading N uptake was generally not related to N concentration and N per plant at awn emergence but was highly correlated with total dry matter accumulation after anthesis and moderately to highly correlated with total plant and grain N per plant at harvest. Postheading N uptake seemed related to the amount of tillering that occurred after anthesis. High‐GPC cultivars did not accumulate more N after heading than low‐GPC cultivars. Nitrogen retranslocation was correlated with total dry matter and N per plant at awn emergence, but the relationship varied with growing season and management. Nitrogen retranslocation and N harvest index were not correlated with GPC. Post‐heading N uptake and N retranslocation were negatively but moderately correlated with each other.
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Claims 8
Claim · model-written summary
Postheading N uptake was highly correlated with total dry matter accumulation after anthesis.
- Taxon
- spring barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- total dry matter accumulation after anthesise0
- Outcome
- Postheading N uptakee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“Partitioning in Spring Barley”
e0“Postheading N uptake was generally not related to N concentration and N per plant at awn emergence but was highly correlated with total dry matter accumulation after anthesis”
Claim · model-written summary
Postheading N uptake was not related to N concentration and N per plant at awn emergence.
- Taxon
- spring barleyHordeum vulgaret0
- Treatment
- N concentration and N per plant at awn emergencee0
- Outcome
- Postheading N uptakee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Partitioning in Spring Barley”
e0“Postheading N uptake was generally not related to N concentration and N per plant at awn emergence but was highly correlated with total dry matter accumulation after anthesis”
Claim · model-written summary
Postheading N uptake was moderately to highly correlated with total plant and grain N per plant at harvest.
- Taxon
- spring barleyHordeum vulgaret0
- Treatment
- total plant and grain N per plant at harveste1
- Outcome
- Postheading N uptakee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Partitioning in Spring Barley”
e0“Postheading N uptake was generally not related to N concentration and N per plant at awn emergence but was highly correlated with total dry matter accumulation after anthesis”
e1“moderately to highly correlated with total plant and grain N per plant at harvest”
Claim · model-written summary
Postheading N uptake seemed related to the amount of tillering that occurred after anthesis.
- Taxon
- spring barleyHordeum vulgaret0
- Treatment
- the amount of tillering that occurred after anthesise2
- Outcome
- Postheading N uptakee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Partitioning in Spring Barley”
e0“Postheading N uptake was generally not related to N concentration and N per plant at awn emergence but was highly correlated with total dry matter accumulation after anthesis”
e2“Postheading N uptake seemed related to the amount of tillering that occurred after anthesis”
Claim · model-written summary
High-GPC cultivars did not accumulate more N after heading than low-GPC cultivars.
- Taxon
- spring barleyHordeum vulgaret0
- Treatment
- High‐GPC cultivarse3
- Outcome
- N after headinge3
- Direction
- did not accumulate moree3
- Comparator
- low‐GPC cultivarse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Partitioning in Spring Barley”
e3“High‐GPC cultivars did not accumulate more N after heading than low‐GPC cultivars”
Claim · model-written summary
Nitrogen retranslocation was correlated with total dry matter and N per plant at awn emergence, with a relationship that varied with growing season and management.
- Taxon
- spring barleyHordeum vulgaret0
- Treatment
- total dry matter and N per plant at awn emergencee4
- Outcome
- Nitrogen retranslocatione4
- Qualifier
- relationship varied with growing season and managemente4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Partitioning in Spring Barley”
e4“Nitrogen retranslocation was correlated with total dry matter and N per plant at awn emergence, but the relationship varied with growing season and management”
Claim · model-written summary
Nitrogen retranslocation and N harvest index were not correlated with grain protein concentration.
- Taxon
- spring barleyHordeum vulgaret0
- Treatment
- GPCe5
- Outcome
- Nitrogen retranslocation and N harvest indexe5
- Direction
- not correlatede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Partitioning in Spring Barley”
e5“Nitrogen retranslocation and N harvest index were not correlated with GPC”
Claim · model-written summary
Postheading N uptake and N retranslocation were negatively but moderately correlated.
- Taxon
- spring barleyHordeum vulgaret0
- Treatment
- N retranslocatione6
- Outcome
- N uptakee6
- Direction
- negativelye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Partitioning in Spring Barley”
e6“N uptake and N retranslocation were negatively but moderately correlated with each other”