Abstract
In this research, impact of climate change on wheat yield was simulated using SWAP in Myandoab, Iran. Field data of wheat in 2004–2005 and 2005–2006 periods were used for calibration and validation of the SWAP, respectively. The HadCM3 outputs, for A1B, A2 and B1 scenarios and 2046–2065 periods, were used in SWAP and wheat yield in mentioned period was compared with base period. Three irrigation levels, based on meeting 100, 70 and 50% of the crop ET demand, were used to study the climate change effects on wheat yield in full and deficit irrigation conditions. The results showed that temperature and reference evapotranspiration will increase in 2055s. Temperature increase cause to decrease crop growing period and crop evapotranspiration. The results showed that the negative impact of temperature increase has dominated to the positive impact of CO2 concentration and the yield is reduced. For full irrigation situation, the reduction will be 24.1, 22.4 and 20.8% in A1B, A2 and B1, respectively. Reduction in yield can be related to the shorter maturity period of the crop. The results showed that under deficit irrigation, the yield is also decreased but this decrease rate of yield is higher in full irrigation.
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Claims 9
Claim · model-written summary
Temperature and reference evapotranspiration are projected to increase in the 2055s for wheat at Myandoab.
- Taxon
- wheat
Triticum aestivume1 - Outcome
- temperature and reference evapotranspiratione2
- Qualifier
- will increase in 2055se2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“impact of climate change on wheat yield was simulated using SWAP in Myandoab, Iran”
e2“The results showed that temperature and reference evapotranspiration will increase in 2055s”
Claim · model-written summary
Temperature increase is projected to decrease the crop growing period and crop evapotranspiration of wheat.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Temperature increasee3
- Outcome
- crop growing period and crop evapotranspiratione3
- Direction
- decreasee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“impact of climate change on wheat yield was simulated using SWAP in Myandoab, Iran”
e3“Temperature increase cause to decrease crop growing period and crop evapotranspiration”
Claim · model-written summary
The negative impact of temperature increase dominates the positive impact of CO2 concentration, so the wheat yield is reduced.
- Taxon
- wheatTriticum aestivume1
- Treatment
- temperature increasee4
- Outcome
- the yield is reducede4
- Direction
- reducede4
- Qualifier
- the positive impact of CO2 concentratione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“impact of climate change on wheat yield was simulated using SWAP in Myandoab, Iran”
e4“the negative impact of temperature increase has dominated to the positive impact of CO2 concentration and the yield is reduced”
Claim · model-written summary
Under full irrigation, the projected wheat yield reduction in the A1B scenario is 24.1 for 2046-2065.
- Taxon
- wheatTriticum aestivume1
- Treatment
- full irrigatione6
- Outcome
- wheat yielde5
- Direction
- reductione6
- Value
- 24.1e6
- Qualifier
- A1Be6
- Comparator
- base periode5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“impact of climate change on wheat yield was simulated using SWAP in Myandoab, Iran”
e5“wheat yield in mentioned period was compared with base period”
e6“For full irrigation situation, the reduction will be 24.1, 22.4 and 20.8% in A1B, A2 and B1, respectively”
Claim · model-written summary
Under full irrigation, the projected wheat yield reduction in the A2 scenario is 22.4 for 2046-2065.
- Taxon
- wheatTriticum aestivume1
- Treatment
- full irrigatione6
- Outcome
- wheat yielde5
- Direction
- reductione6
- Value
- 22.4e6
- Qualifier
- A2e6
- Comparator
- base periode5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“impact of climate change on wheat yield was simulated using SWAP in Myandoab, Iran”
e5“wheat yield in mentioned period was compared with base period”
e6“For full irrigation situation, the reduction will be 24.1, 22.4 and 20.8% in A1B, A2 and B1, respectively”
Claim · model-written summary
Under full irrigation, the projected wheat yield reduction in the B1 scenario is 20.8% for 2046-2065.
- Taxon
- wheatTriticum aestivume1
- Treatment
- full irrigatione6
- Outcome
- wheat yielde5
- Direction
- reductione6
- Value
- 20.8%e6
- Qualifier
- B1e6
- Comparator
- base periode5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“impact of climate change on wheat yield was simulated using SWAP in Myandoab, Iran”
e5“wheat yield in mentioned period was compared with base period”
e6“For full irrigation situation, the reduction will be 24.1, 22.4 and 20.8% in A1B, A2 and B1, respectively”
Claim · model-written summary
Under deficit irrigation, the projected wheat yield is also decreased.
- Taxon
- wheatTriticum aestivume1
- Treatment
- deficit irrigatione7
- Outcome
- yielde7
- Direction
- decreasede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“impact of climate change on wheat yield was simulated using SWAP in Myandoab, Iran”
e7“under deficit irrigation, the yield is also decreased”
Claim · model-written summary
The rate of wheat yield decrease is higher under full irrigation than under deficit irrigation.
- Taxon
- wheatTriticum aestivume1
- Treatment
- full irrigatione0
- Outcome
- decrease rate of yielde0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“impact of climate change on wheat yield was simulated using SWAP in Myandoab, Iran”
e0“this decrease rate of yield is higher in full irrigation”
Claim · model-written summary
The authors suggest the wheat yield reduction may be related to the shorter maturity period of the crop.
- Taxon
- wheatTriticum aestivume1
- Outcome
- Reduction in yielde0
- Qualifier
- shorter maturity periode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“impact of climate change on wheat yield was simulated using SWAP in Myandoab, Iran”
e0“Reduction in yield can be related to the shorter maturity period of the crop”
The same questions in other papers
irrigation · yield · Triticum aestivum (wheat)Positive and negative results
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