Climate change impacts modeling on winter wheat yield under full and deficit irrigation in Myandoab-Iran

Azad, Nasrin; Behmanesh, Javad; Rezaverdinejad, Vahid; Rezaie, Heydar Tayfeh

doi:10.1080/03650340.2017.1373187

Cited by 28 publications

(17 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the regression equation, a 10% reduction in ETpc leads to a 32% drop in potato productivity. This shows that low soil water stress values possibly cause partial closure in the stomata of potato leaves and reduces CO 2 assimilation (AZAD et al, 2018). Thus, irrigation management in the potato crop should be carried out in such a way that the current water table in the soil remains close to the limit representing its total water capacity to avoid large losses of productivity.…”

Section: Resultsmentioning

confidence: 99%

“…The consequence of the situation is an increase in leaf temperature and a reduction in the production of Biosci. J., Uberlândia, v. 36, n. 3, p. 886-895, May/June 2020 http://dx.doi.org/10.14393/BJ-v36n3a2020-47862 photoassimilates, causing a reduction in crop productivity (GONZÁLEZ-REAL et al, 2017;AZAD et al, 2018). According to Carvalho et al (2014) and Locatelli et al (2014), the bean grain productivity is influenced by the water regime, which can affect root system growth, nutrient uptake and translocation.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Controlled water stress in agricultural crops in brazilian cerrado

Santos

Mantovani

Venâncio³

et al. 2020

Biosci. J.

View full text Add to dashboard Cite

Considering the scenarios with reduction of water availability, the need to increase water use efficiency and crop yield, the objective of this study was to evaluate the effect of reducing the evapotranspiration of the main irrigated crops on productivity. Data from the years 2005 to 2016 for carrot, garlic, potato, sugarcane, bean, maize, soybean, wheat, coffee and cotton crops grown in the Brazilian states of Bahia, Minas Gerais, São Paulo, Goiás, Distrito Federal and Mato Grosso were collected. The crops were irrigated by central-pivot irrigation and drip irrigation systems, and irrigation management was performed using IRRIGER® software. With the information on potential crop evapotranspiration (ETpc) and crop evapotranspiration (ETc), it was possible to obtain a reduction of ETpc (%) for all crops. For all scenarios, these data were confronted with crop productivity and regression models were fitted. It was concluded that the maximum reductions of ETpc (%) without affecting productivity are 5% for garlic and potato, 12% for maize, 13% for bean, 15% for wheat, 20% for soybean and cotton, 25% for sugarcane and 30% for coffee.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Controlled water stress in agricultural crops in brazilian cerrado

Santos

Mantovani

Venâncio³

et al. 2020

Biosci. J.

View full text Add to dashboard Cite

show abstract

“…Climate models projected a continuous rise in temperature in Iraq which would cause a further decrease in CWA and increase in CWD. Azad et al [13] used Soil and Water Assessment Tool (SWAT) Figure 9. The spatial distribution of the changes in crop water demand between two periods, and over the irrigated region of Iraq.…”

Section: Discussionmentioning

confidence: 99%

“…Climate models projected a continuous rise in temperature in Iraq which would cause a further decrease in CWA and increase in CWD. Azad et al [13] used Soil and Water Assessment Tool (SWAT) to show the effect of climate change on winter wheat crop in the north of Iran, bordering northeast of Iraq and reported a rise in temperature and reference evapotranspiration in the middle of the last century which would cause an increase in water scarcity. Zamani et al [12] assessed climate change implications on CWD in the southwest of Iran and reported a large increase in CWD for all scenarios.…”

Section: Discussionmentioning

confidence: 99%

“…Atmospheric water balance has been assessed in different regions of the earth to provide clues to climate change implications in agricultural water use in terms of variations in net irrigation needs [3,[11][12][13][14][15][16][17][18][19][20]. However, there is no study so far on detecting/assessing the spatiotemporal changes in CWD and CWA employing long-term precipitation and temperature data and trustworthy methods.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Changes in Climatic Water Availability and Crop Water Demand for Iraq Region

et al. 2020

View full text Add to dashboard Cite

Decreases in climatic water availability (CWA) and increases in crop water demand (CWD) in the background of climate change are a major concern in arid regions because of less water availability and higher irrigation requirements for crop production. Assessment of the spatiotemporal changes in CWA and CWD is important for the adaptation of irrigated agriculture to climate change for such regions. The recent changes in CWA and CWD during growing seasons of major crops have been assessed for Iraq where rapid changes in climate have been noticed in recent decades. Gridded precipitation of the global precipitation climatology center (GPCC) and gridded temperature of the climate research unit (CRU) having a spatial resolution of 0.5°, were used for the estimation of CWA and CWD using simple water balance equations. The Mann–Kendall (MK) test and one of its modified versions which can consider long-term persistence in time series, were used to estimate trends in CWA for the period 1961–2013. In addition, the changes in CWD between early (1961–1990) and late (1984–2013) periods were evaluated using the Wilcoxon rank test. The results revealed a deficit in water in all the seasons in most of the country while a surplus in the northern highlands in all the seasons except summer was observed. A significant reduction in the annual amount of CWA at a rate of −1 to −13 mm/year was observed at 0.5 level of significance in most of Iraq except in the north. Decreasing trends in CWA in spring (−0.4 to −1.8 mm/year), summer (−5.0 to −11 mm/year) and autumn (0.3 to −0.6 mm/year), and almost no change in winter was observed. The CWA during the growing season of summer crop (millet and sorghum) was found to decrease significantly in most of Iraq except in the north. The comparison of CWD revealed an increase in agricultural water needs in the late period (1984–2013) compared to the early period (1961–1990) by 1.0–8.0, 1.0–14, 15–30, 14–27 and 0.0–10 mm for wheat, barley, millet, sorghum and potato, respectively. The highest increase in CWD was found in April, October, June, June and April for wheat, barley, millet, sorghum and potato, respectively.

show abstract

Deficit irrigation effectively reduces soil carbon dioxide emissions from wheat fields in Northwest China

et al. 2019

View full text Add to dashboard Cite

BACKGROUND: An irrigation regime is an important factor in regulating soil CO 2 emissions from wheat fields. Deficit irrigation can be applied easily in the fields and has been implemented in northwest China. Previous studies have mainly focused on the effects of deficit irrigation on crop yield and quality. Studies on its environmental impacts are sparse. RESULTS: Soil CO 2 fluxes from deficit-irrigated fields were lower than those from full irrigation (CK) during most of the growing season. Cumulative soil CO 2 emissions from deficit-irrigated fields were reduced by 10.2-25.5%, compared with the CK. Peaks of soil CO 2 fluxes were observed 3-7 days after irrigation in the water-filled pore space (WFPS) range of 65.7-80.4%. Under different irrigation regimes, significant positive correlations were observed between soil CO 2 fluxes and WFPS (P < 0.01), but no significant correlations were found between soil CO 2 fluxes and soil temperature. Compared to CK, yields for the T1, T2, and T4 were significantly reduced (P < 0.05) but the yield for T3 was only reduced by 2.3% (P > 0.05); T3 significantly reduced soil CO 2 emissions by 10.2% (P < 0.05) and reduced the irrigation water amount by 5.7%. CONCLUSION: Deficit irrigation effectively reduced CO 2 emissions from winter wheat field soils. T3 may be a water-saving, CO 2 emission-reducing and high-yield irrigation regime for winter wheat fields in northwest China. The research laid a preliminary theoretical foundation for formulating winter wheat irrigation systems that are water saving, emission reducing, and that produce high yields.

show abstract

Climate change impacts modeling on winter wheat yield under full and deficit irrigation in Myandoab-Iran

Cited by 28 publications

References 48 publications

Controlled water stress in agricultural crops in brazilian cerrado

Controlled water stress in agricultural crops in brazilian cerrado

Changes in Climatic Water Availability and Crop Water Demand for Iraq Region

Deficit irrigation effectively reduces soil carbon dioxide emissions from wheat fields in Northwest China

Contact Info

Product

Resources

About