Spatial analysis of the sensitivity of wheat yields to temperature in India

Rao, B. Bapuji; Chowdary, P. S. B.; Sandeep, V. M.; Pramod, V. P.; Rao, V. U. M.

doi:10.1016/j.agrformet.2014.09.023

Cited by 56 publications

(32 citation statements)

References 48 publications

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“…Other studies (e.g. Rao et al, 2015) have suggested higher critical temperatures: an exposure to daily T max above 36 • C and T min 31 • C during the period immediately before flowering (January) may result in sterility and reduced yield. Simulated yield studies show possible reductions of about 10 %-15 % by the end of the century if 40 • C is exceeded for only 1 day (Koehler et al, 2013).…”

Section: Consequences Of Temperature On Agriculturementioning

confidence: 95%

“…Several studies (Rao et al, 2015;Duncan et al, 2015) have found that wheat is becoming more sensitive to increasing minimum temperatures and that a continuous exposure to a daily minimum temperature (T min ) exceeding 12 • C for 6 days and T max exceeding 34 • C for 7 days past flowering (February) constrains yields (Rao et al, 2015).…”

Section: Consequences Of Temperature On Agriculturementioning

confidence: 99%

See 1 more Smart Citation

Downscaling probability of long heatwaves based on seasonal mean daily maximum temperatures

Benestad

Oort

Justino³

et al. 2018

Adv. Stat. Clim. Meteorol. Oceanogr.

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Abstract. A methodology for estimating and downscaling the probability associated with the duration of heatwaves is presented and applied as a case study for Indian wheat crops. These probability estimates make use of empirical-statistical downscaling and statistical modelling of probability of occurrence and streak length statistics, and we present projections based on large multi-model ensembles of global climate models from the Coupled Model Intercomparison Project Phase 5 and three different emissions scenarios: Representative Concentration Pathways (RCPs) 2.6, 4.5, and 8.5. Our objective was to estimate the probabilities for heatwaves with more than 5 consecutive days with daily maximum temperature above 35 ∘C, which represent a condition that limits wheat yields. Such heatwaves are already quite frequent under current climate conditions, and downscaled estimates of the probability of occurrence in 2010 is in the range of 20 %–84 % depending on the location. For the year 2100, the high-emission scenario RCP8.5 suggests more frequent occurrences, with a probability in the range of 36 %–88 %. Our results also point to increased probabilities for a hot day to turn into a heatwave lasting more than 5 days, from roughly 8 %–20 % at present to 9 %–23 % in 2100 assuming future emissions according to the RCP8.5 scenario; however, these estimates were to a greater extent subject to systematic biases. We also demonstrate a downscaling methodology based on principal component analysis that can produce reasonable results even when the data are sparse with variable quality.

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Section: Consequences Of Temperature On Agriculturementioning

confidence: 95%

Section: Consequences Of Temperature On Agriculturementioning

confidence: 99%

Downscaling probability of long heatwaves based on seasonal mean daily maximum temperatures

Benestad

Oort

Justino³

et al. 2018

Adv. Stat. Clim. Meteorol. Oceanogr.

View full text Add to dashboard Cite

show abstract

“…Heat can negatively affect both the number of grains produced and their dry weight, the most important determinants of yield in wheat (Evans 1978;Wollenweber et al 2003;Barnabás et al 2007;Rao et al 2015). Studies on wheat have mainly used yield as a measure of thermotolerance and only a few reports have addressed the effect of high temperature directly on pollen number and quality.…”

Section: Pollen Thermotolerance In Wheat (Triticum Aestivum)mentioning

confidence: 99%

Heat stress regimes for the investigation of pollen thermotolerance in crop plants

Iannacone²,

et al. 2016

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Pollen thermotolerance. Global warming is predicted to increase the frequency and severity of extreme weather phenomena such as heat waves thereby posing a major threat for crop productivity and food security. The yield in case of most crop species is dependent on the success of reproductive development. Pollen development has been shown to be highly sensitive to elevated temperatures while the development of the female gametophyte as well as sporophytic tissues might also be disturbed under mild or severe heat stress conditions. Therefore, assessing pollen thermotolerance is currently of high interest for geneticists, plant biologists and breeders. A key aspect in pollen thermotolerance studies is the selection of the appropriate heat stress regime, the developmental stage that the stress is applied to, as well as the method of application. Literature search reveals a rather high variability in heat stress treatments mainly due to the lack of standardized protocols for different plant species. In this review, we summarize and discuss experimental approaches that have been used in various crops, with special focus on tomato, rice and wheat, as the best studied crops regarding pollen thermotolerance. The overview of stress treatments and the major outcomes of each study aim to provide guidelines for similar research in other crops.

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“…Three types of climatic risks, drought, extreme rainfall, and heat waves were mapped using gridded data from the Indian Meteorological Department. These three risks have a substantial impact on the production of the major crops (Rao et al 2015;Singh et al 2017).…”

Section: Climatic Risksmentioning

confidence: 99%

Woman in agriculture, and climate risks: hotspots for development

Chanana-Nag

Aggarwal

2018

Climatic Change

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There is rising interest among research and development practitioners to arrive at impact driven solutions in the field of gender and climate change adaptation. Climate change adaptation interventions can be better targeted by being linked with type of climatic risks experienced by women farmers, their social profile and their needs based on the role they play in agriculture. This study presents a methodology to identify hotspots where climate change adaptation and gender based interventions could be prioritized. The methodology is illustrated for India. The results suggest 36 hotspots across 10 states in India, where large number of women farmers are impacted by high levels of drought probability, excess rainfall and heat wave. The target population in these hotspots comprise 14.4% of the total women farmers in the country. A socioeconomic characterization of the hotspot population highlights barriers, such as labor, credit and market access for female cultivators and lower wage rates for female laborers in these hotspots. Based on the constraints as well as the climatic risks faced by these women in the hotspots, the potential of climate-smart agriculture technologies and practices are emphasized. Additionally, a comparison of current research being done in the field with the results of the study highlights the potential to learn from current efforts for efficient scalability of gender and climate change adaptation interventions.

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Spatial analysis of the sensitivity of wheat yields to temperature in India

Cited by 56 publications

References 48 publications

Downscaling probability of long heatwaves based on seasonal mean daily maximum temperatures

Downscaling probability of long heatwaves based on seasonal mean daily maximum temperatures

Heat stress regimes for the investigation of pollen thermotolerance in crop plants

Woman in agriculture, and climate risks: hotspots for development

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