Abstract
A field experiment was conducted to determine barley productivity, carbon discrimination analysis and Nitrogen Utilization Efficiency (NUE) under rainfed and Supplemental Irrigation (SI) conditions for two seasons. The treatments consisted of two water (rainfed and SI) and two N (zero and 50 kg N ha-1) levels. At harvest, barley grain yield was recorded and shoot and grain samples were taken for chemical analysis, dry matter determination and carbon and nitrogen isotope compositions analysis. Grain yield increased with SI and with N addition under SI only suggesting the soil moisture is the more limiting growth factor. Nitrogen uptake was higher with SI in both seasons and with N in the second season. Grain and N uptake derived from fertilizer were higher with SI in both seasons. SI increased the soil moisture and therefore, increased the NUE in the second season only but not in the first drier season. Carbon isotope discrimination was higher with SI and decreased with N application. Carbon isotope discrimination correlated positively with grain yield and shoot dry matter in the second season only and with the Water Use Efficiency (WUE) in the first drier season. Therefore, it can be concluded that SI increased barley production and NUE. In addition, carbon isotope discrimination can be used as tools for predicting barley production in relatively wet season and WUE in the drier season.
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Claims 13
Claim · model-written summary
Supplemental irrigation increased barley grain yield.
- Taxon
- Barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- SIe0
- Outcome
- Grain yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Grain yield increased with SI and with N addition under SI only”
t0“Barley”
Claim · model-written summary
Nitrogen addition increased grain yield only under supplemental irrigation.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- N additione0
- Outcome
- Grain yielde0
- Direction
- increasede0
- Qualifier
- under SI onlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield increased with SI and with N addition under SI only”
t0“Barley”
Claim · model-written summary
Supplemental irrigation increased nitrogen uptake in both seasons.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- SIe0
- Outcome
- Nitrogen uptakee0
- Direction
- highere0
- Qualifier
- in both seasonse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen uptake was higher with SI in both seasons”
t0“Barley”
Claim · model-written summary
Nitrogen addition increased nitrogen uptake in the second season.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Ne0
- Outcome
- Nitrogen uptakee0
- Direction
- highere0
- Qualifier
- in the second seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen uptake was higher with SI in both seasons and with N in the second season.”
t0“Barley”
Claim · model-written summary
Supplemental irrigation increased grain-derived fertilizer nitrogen uptake in both seasons.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- SIe0
- Outcome
- Grain and N uptake derived from fertilizere0
- Direction
- highere0
- Qualifier
- in both seasonse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain and N uptake derived from fertilizer were higher with SI in both seasons.”
t0“Barley”
Claim · model-written summary
Supplemental irrigation increased soil moisture.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- SIe0
- Outcome
- soil moisturee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SI increased the soil moisture”
t0“Barley”
Claim · model-written summary
Supplemental irrigation increased nitrogen utilization efficiency in the second season only, with no increase in the first drier season.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- SIe0
- Outcome
- NUEe0
- Direction
- increasede0
- Qualifier
- in the second season only but not in the first drier seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SI increased the soil moisture and therefore, increased the NUE in the second season only but not in the first drier season.”
t0“Barley”
Claim · model-written summary
Supplemental irrigation increased carbon isotope discrimination.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- SIe0
- Outcome
- Carbon isotope discriminatione0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon isotope discrimination was higher with SI”
t0“Barley”
Claim · model-written summary
Nitrogen application decreased carbon isotope discrimination.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- N applicatione0
- Outcome
- Carbon isotope discriminatione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon isotope discrimination was higher with SI and decreased with N application.”
t0“Barley”
Claim · model-written summary
Carbon isotope discrimination correlated positively with grain yield in the second season only.
- Taxon
- BarleyHordeum vulgaret0
- Outcome
- grain yielde0
- Direction
- positivelye0
- Qualifier
- in the second season onlye0
- Comparator
- Carbon isotope discriminatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon isotope discrimination correlated positively with grain yield and shoot dry matter in the second season only”
t0“Barley”
Claim · model-written summary
Carbon isotope discrimination correlated positively with shoot dry matter in the second season only.
- Taxon
- BarleyHordeum vulgaret0
- Outcome
- shoot dry mattere0
- Direction
- positivelye0
- Qualifier
- in the second season onlye0
- Comparator
- Carbon isotope discriminatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon isotope discrimination correlated positively with grain yield and shoot dry matter in the second season only”
t0“Barley”
Claim · model-written summary
Carbon isotope discrimination correlated positively with water use efficiency in the first drier season.
- Taxon
- BarleyHordeum vulgaret0
- Outcome
- Water Use Efficiency (WUE)e0
- Direction
- positivelye0
- Qualifier
- in the first drier seasone0
- Comparator
- Carbon isotope discriminatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon isotope discrimination correlated positively with grain yield and shoot dry matter in the second season only and with the Water Use Efficiency (WUE) in the first drier season.”
t0“Barley”
Claim · model-written summary
The authors propose carbon isotope discrimination to predict barley production in relatively wet seasons and water use efficiency in drier seasons.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- carbon isotope discrimination can be used as tools for predicting barley production in relatively wet season and WUE in the drier seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“carbon isotope discrimination can be used as tools for predicting barley production in relatively wet season and WUE in the drier season.”
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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.