Effect of Altitude on the Response of Net Photosynthetic Rate to Carbon Dioxide Increase by Spring Wheat

Fujimura, Shigenori; shi, Peli; Iwama, Kazuto; Zhang, Xianzhou; Gopal, J.; Jitsuyama, Yutaka

doi:10.1626/pps.13.141

Cited by 15 publications

(11 citation statements)

References 28 publications

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“…The attainable yield (3.06 t/ha) of the crop in the study area was lower than the same yield level of other sorghum producing areas of the country such as the 5.71 t/ha in Eastern Hararghe (Abady et al, 2017;Abduselam et al, 2018) and the 4.41 t/ha in Afar (Dilnesaw et al, 2018), which could be due to local agro-ecological variation and the extent of harmonious application of agronomic practices (Fujimura et al, 2010;Mundia et al, 2019). Furthermore, the attainable yield was below the water-limited yield by 1.97 t/ha indicating existence of limitations in soil nutrients and water, which reduce sorghum yield performance in the area.…”

Section: Yield Levels Variability and Gapsmentioning

confidence: 69%

Model-based yield gap analysis and constraints of rainfed sorghum production in Southwest Ethiopia

et al. 2020

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For ensuring food demand of the fast growing population in developing countries, quantification of crop yield gaps and exploring production constraints are very crucial. Sorghum is one of the most important climate change resilient crops in the rainfed farming systems of semi-arid tropics. However, there is little information about yield gaps and production constraints. This study aimed at analysing existing yield gaps and exploring major constraints of sorghum production in Southwest Ethiopia. A crop simulation model approach using AquaCrop and DSSAT was used to estimate potential yield and analyse the yield gaps. Model calibration and evaluation was performed using data from field experiments conducted in 2018 and 2019. Sorghum production constraints were assessed using a survey. The actual and water-limited yield of sorghum ranged from 0.58 to 2.51 and 3.6 to 6.47 t/ha, respectively for the period 2003–17. The regional yield gaps of sorghum for the targeted period were 3.02–3.95 t/ha with a mean value of 3.51 t/ha. Majority of respondent farmers considered seasonal rainfall risk (98%), poor soil fertility (86%), lack of improved varieties (78%) and inadequate weed management (56%) as major factors responsible for the existing yield gaps. The mean exploitable yield gap (2.5 t/ha) between water-limited and actual yield showed the level of existing opportunity for improvement in the actual productivity of sorghum. The gaps also call for introduction of proper interventions such as adoption of improved varieties, planting date adjustment, conservation tillage, fertilizer application and on time weed management.

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Section: Yield Levels Variability and Gapsmentioning

confidence: 69%

Model-based yield gap analysis and constraints of rainfed sorghum production in Southwest Ethiopia

et al. 2020

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“…The greater values of A evident at higher elevations from the point measurements of leaf gas exchange at identical light and temperature may reflect the enhanced photosynthetic capacity and G tot of S. atopantha and R. dentatus . This enhancement of A at higher elevations would likely not be evident under ambient growth conditions where temperatures and high incident radiation would not be conducive to photosynthesis ( Fujimura et al . 2010 ).…”

Section: Discussionmentioning

confidence: 99%

Growth habit and leaf economics determine gas exchange responses to high elevation in an evergreen tree, a deciduous shrub and a herbaceous annual

et al. 2015

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Elevational changes in temperature and carbon dioxide can be used to predict the likely responses of plants to climate change. However, plant species often exhibit contrasting photosynthetic and morphological responses to altitude. We investigated the photosynthetic responses of plants with different leaf morphologies and growth habits to increased elevation. At high elevations, plants with schlerophyllous leaves that represent a large structural investment are more likely to be positively affected by rising carbon dioxide than species with a lower investment in foliage.

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“…In the OTC experiment, P n before heading was 47% higher in elevated CO 2 than in ambient CO 2 (Fujimura et al, 2010) and it was significantly higher in elevated CO 2 than in ambient CO 2 at about 10 days after heading. However, the elevated CO 2 neither improved total dry weight nor grain yield at final harvest.…”

Section: Discussionmentioning

confidence: 78%

“…The effect of temperature on phenological development compared with that in 39.8 Pa (Fujimura et al, 2010). In free-air CO 2 enrichment and OTC experiments, the P n was enhanced by 30 −50% with the increase in CO 2 from the current level to 550−700 µmol mol -1 (Kimball et al 2002;van Oijen et al, 1999;Mulholland et al, 1997).…”

Section: Growth Chamber Experiments In Sapporomentioning

confidence: 97%

Effects of CO₂Increase on Wheat Growth and Yield under Different Atmospheric Pressures and Their Interaction with Temperature

Fujimura

Shi

Iwama

et al. 2012

Plant Production Science

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Effect of Altitude on the Response of Net Photosynthetic Rate to Carbon Dioxide Increase by Spring Wheat

Cited by 15 publications

References 28 publications

Model-based yield gap analysis and constraints of rainfed sorghum production in Southwest Ethiopia

Model-based yield gap analysis and constraints of rainfed sorghum production in Southwest Ethiopia

Growth habit and leaf economics determine gas exchange responses to high elevation in an evergreen tree, a deciduous shrub and a herbaceous annual

Effects of CO₂Increase on Wheat Growth and Yield under Different Atmospheric Pressures and Their Interaction with Temperature

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Effect of Altitude on the Response of Net Photosynthetic Rate to Carbon Dioxide Increase by Spring Wheat

Cited by 15 publications

References 28 publications

Model-based yield gap analysis and constraints of rainfed sorghum production in Southwest Ethiopia

Model-based yield gap analysis and constraints of rainfed sorghum production in Southwest Ethiopia

Growth habit and leaf economics determine gas exchange responses to high elevation in an evergreen tree, a deciduous shrub and a herbaceous annual

Effects of CO2Increase on Wheat Growth and Yield under Different Atmospheric Pressures and Their Interaction with Temperature

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Effects of CO₂Increase on Wheat Growth and Yield under Different Atmospheric Pressures and Their Interaction with Temperature