Abstract
Abstract Two nitrogen and two moisture levels were combined in 4 treatments to study nitrogen and moisture effects on barley grown under moisture stress conditions. Nitrogen was applied at 17 and 68 kg/ha and moisture levels differed by 3.7 surface cm at heading. The higher nitrogen level increased dry matter production during the vegetative growth period. Green leaf area (both sides) reached a maximum of 4.8 times the land area at late jointing and decreased because of moisture stress thereafter. Green leaf area was higher for over a month between late jointing and the soft dough stage with higher nitrogen. This greater transpiring area is suggested as the cause for grain yield decreases with more nitrogen. Increased moisture stress with higher nitrogen was indicated by decreased green to necrotic leaf weight ratios and greater straw to grain weight ratios. Additional applied nitrogen was reflected in increased uptake of nitrogen. However, for a given nitrogen level, nitrogen content was higher at the lower moisture level. The additional 3.7 cm of water at heading increased average barley grain yield 560 kg/ha and increased moisture use efficiency up to 23.3 kg per hectare‐centimeter of water for the growing season.
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Claims 11
Claim · model-written summary
Higher nitrogen increased vegetative dry matter production.
- Taxon
- Barley
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Hordeum vulgaret0 - Organ / stage
- vegetative growth periode0
- Treatment
- higher nitrogen levele0
- Outcome
- dry matter productione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The higher nitrogen level increased dry matter production during the vegetative growth period.”
t0“Barley”
Claim · model-written summary
Green leaf area peaked at 4.8 times land area at late jointing.
- Taxon
- BarleyHordeum vulgaret0
- Organ / stage
- late jointinge0
- Outcome
- Green leaf area (both sides)e0
- Direction
- maximume0
- Value
- 4.8 times the land areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Green leaf area (both sides) reached a maximum of 4.8 times the land area at late jointing”
t0“Barley”
Claim · model-written summary
Green leaf area declined after late jointing because of moisture stress.
- Taxon
- BarleyHordeum vulgaret0
- Outcome
- Green leaf areae0
- Direction
- decreasede0
- Qualifier
- because of moisture stress thereaftere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Green leaf area (both sides) reached a maximum of 4.8 times the land area at late jointing and decreased because of moisture stress thereafter.”
t0“Barley”
Claim · model-written summary
Higher nitrogen increased green leaf area for over a month from late jointing toward soft dough stage.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- higher nitrogene0
- Outcome
- Green leaf areae0
- Direction
- highere0
- Qualifier
- for over a month between late jointing and the soft dough stagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Green leaf area was higher for over a month between late jointing and the soft dough stage with higher nitrogen.”
t0“Barley”
Claim · model-written summary
The authors suggest increased transpiring area caused lower grain yield with more nitrogen.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- more nitrogene0
- Outcome
- grain yield decreasese0
- Direction
- decreasese0
- Qualifier
- greater transpiring areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This greater transpiring area is suggested as the cause for grain yield decreases with more nitrogen.”
t0“Barley”
Claim · model-written summary
Higher nitrogen reduced the green to necrotic leaf weight ratio, indicating increased moisture stress.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- higher nitrogene0
- Outcome
- green to necrotic leaf weight ratiose0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased moisture stress with higher nitrogen was indicated by decreased green to necrotic leaf weight ratios and greater straw to grain weight ratios.”
t0“Barley”
Claim · model-written summary
Higher nitrogen raised the straw to grain weight ratio, indicating increased moisture stress.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- higher nitrogene0
- Outcome
- straw to grain weight ratiose0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased moisture stress with higher nitrogen was indicated by decreased green to necrotic leaf weight ratios and greater straw to grain weight ratios.”
t0“Barley”
Claim · model-written summary
Additional applied nitrogen increased barley nitrogen uptake.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Additional applied nitrogene0
- Outcome
- uptake of nitrogene0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Additional applied nitrogen was reflected in increased uptake of nitrogen.”
t0“Barley”
Claim · model-written summary
At a given nitrogen level, barley nitrogen content was higher with less moisture.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- lower moisture levele0
- Outcome
- nitrogen contente0
- Direction
- highere0
- Qualifier
- for a given nitrogen levele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for a given nitrogen level, nitrogen content was higher at the lower moisture level.”
t0“Barley”
Claim · model-written summary
An additional 3.7 cm of water at heading increased mean barley grain yield by 560 kg/ha.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- additional 3.7 cm of water at headinge0
- Outcome
- average barley grain yielde0
- Direction
- increasede0
- Value
- 560 kg/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The additional 3.7 cm of water at heading increased average barley grain yield 560 kg/ha”
t0“Barley”
Claim · model-written summary
An additional 3.7 cm of water at heading increased moisture use efficiency up to 23.3 kg per hectare‐centimeter of water.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- additional 3.7 cm of water at headinge0
- Outcome
- moisture use efficiencye0
- Direction
- increasede0
- Value
- 23.3 kg per hectare‐centimeter of watere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The additional 3.7 cm of water at heading increased average barley grain yield 560 kg/ha and increased moisture use efficiency up to 23.3 kg per hectare‐centimeter of water for the growing season.”
t0“Barley”
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- no effect
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See all 299 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.