Effect of climate and atmospheric change on soybean water stress: a study of Iowa

Haskett, Jonathan; Pachepsky, Yakov; Acock, B.

doi:10.1016/s0304-3800(00)00369-0

Cited by 54 publications

(31 citation statements)

References 35 publications

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Section: Discussion and Implications For Policymentioning

confidence: 98%

“…For Cameroon, our results indicate that the negative effect of increased temperatures will, in almost all cases for bambara groundnut, groundnut and soybean, be compensated by the positive effects of higher CO 2 concentrations. The drops in the yield of groundnut and bambara at Bamenda and Tiko under the GISS and HadCM3 scenarios A2/B2 2080, respectively, may at least in part be explained by changes in nodule activity and nitrogen supply as a result of the higher temperatures and/or precipitation changes (Haskett et al 2000).Overall, a strong increase is projected in bambara, groundnut and soybean (C3 crops) yields and little or no change and even decreases for maize and sorghum (C4 crops). These are consistent with other simulations and experimental results reported by Downing et al (2000) and Thomson et al (2005).…”

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confidence: 99%

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Effects of climate change on crop production in Cameroon

Tingem¹,

Rivington²,

Bellocchi³

et al. 2008

Clim. Res.

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This study involves an assessment of the potential effects of greenhouse gas climate change, as well as the direct fertilization effect of CO 2 on crop yields in Cameroon. The methodology involves coupling the transient diagnostics of 2 atmosphere-ocean general circulation models, namely NASA/Goddard Institute GISS and the Hadley Centre's HadCM3, to the CropSyst crop model to simulate current and future (2020, 2080) crop yields (bambara nut, groundnut, maize, sorghum and soybean) in 8 agricultural regions of Cameroon. For the future we estimate substantial yield increases for bambara groundnut, soybean and groundnut, and little or no change and even decreases of maize and sorghum yields, varying according to the climate scenario and the agricultural region. Maize and sorghum (both C4 crops) yields are expected to decrease by 14.6 and 39.9%, respectively, across the whole country under GISS 2080 scenarios. The results also show that the effect of temperature patterns on climate change is much more important than that of precipitation. Findings call for monitoring of climate change/variability and dissemination of information to farmers, to encourage adaptation to climate change.KEY WORDS: Cameroon · Climate change · CO 2 · Crop yields · Adaptation · CropSyst Resale or republication not permitted without written consent of the publisherClim Res 36: [65][66][67][68][69][70][71][72][73][74][75][76][77] 2008 Though a few studies have been conducted to assess the impact of climate change on agriculture in developing countries (Seo et al. 2005, Adejuwon, 2006, Thornton et al. 2006, Kabubo-Mariara & Karanja 2007, there is a dearth of literature on this impact in Cameroon; thus the adaptation and mitigation measures that are available to policy makers are severely limited.The present study aims to partially address this research gap. It uses the coupled climate scenariocrop model method, in which coupled atmosphereocean general circulation models (A-OGCMs), used to generate future climate scenarios, are integrated into crop models in order to simulate future crop yields (Tubiello et al. 2000, Brassard & Singh 2007. The use of this method allows us to gain an insight not only into how future crop yields may change, but also into the nature of the factors responsible for yield changes, and how they may affect crop production. Understanding the impacts of long-term climate change on agriculture is crucial for future agricultural policies and interventions in Cameroon, as well as aiding practical steps to mitigate potentially adverse impacts of climate change, which is likely to have important implications for future food security.The general objective of this study is to examine the effects of long-term climate change on Cameroon crop agriculture and identify the adaptation options of agroecological systems using a simulation analysis. The specific objectives are to simulate and highlight the expected effects of various long-term climate change scenarios on future agricultural productivity and discuss policy ...

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Section: Discussion and Implications For Policymentioning

confidence: 98%

mentioning

confidence: 99%

Effects of climate change on crop production in Cameroon

Tingem¹,

Rivington²,

Bellocchi³

et al. 2008

Clim. Res.

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“…cultivars by Rosa & Forseth (1996). Various soybean physiological properties show fluctuations on a seasonal scale (Haskett et al, 2000), where drought stress is a major constraint to yield stability. The hypothesis is that daily heliotropic properties change during the soybean plant development, and that cultivars differentiated by the morphological and physiological properties would exhibit diverse heliotropic daily courses, and final grain production.…”

Section: Introductionmentioning

confidence: 99%

Heliotropic responses of soybean cultivars at three phenological stages and under two water regimes

Rakocevic

Neumaier

Oliveira

et al. 2010

Pesq. agropec. bras.

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-The objectives of this work were to determine the heliotropic movements of the upper trifoliates for two soybean cultivars, BR 16 and Embrapa 48, during a daily cycle, in three phenological stages and two water regimes, and to estimate the impact of irrigation and daily leaflet movements on agronomic characteristics and grain yield. Heliotropic movements were studied in three phenological stages: V4-V6, V7-V10, and R5 in irrigated and non-irrigated plots. For each stage, the leaflet elevation and azimuth were measured hourly. Under a low (V4-V6 stage) and mid (V7-V10 stage) leaf area index (LAI) the diaheliotropism was slightly more frequent and intensive in non-irrigated than in irrigated plants, only at early morning and late afternoon hours. At R5 stage (high LAI) the paraheliotropism of superior trifoliates was predominant and more intensive in non-irrigated plants. The heliotropic movements are correlated to carbon gain, but not to environment (light intensity or temperature), for measurements at 11h. 'Embrapa 48' expresses greater paraheliotropism than 'BR 16' at high LAI, while 'BR 16' displays lower heliotropic plasticity under irrigation. In spite of significant heliotropic differences, genotype and water availability treatments did not influence the final grain yield.Index terms: Glycine max, diaheliotropism, irrigation, leaf area index, paraheliotropism. Respostas heliotrópicas de cultivares de soja em três estádios fenológicos e dois regimes hídricosResumo -Os objetivos deste trabalho foram determinar o movimento heliotrópico dos trifólios superiores de duas cultivares de soja, BR 16 e Embrapa 48, durante o dia, em três estádios fenológicos e em dois regimes hídricos e determinar o impacto da irrigação e do movimento foliar diário nas características agronômicas e na produção de grãos. Movimentos heliotrópicos foram determinados a cada hora, em três estádios fenológicos: V4-V6, V7-V10 e R5, em parcelas irrigadas e não irrigadas. Para cada estágio, a elevação do folíolo e o azimute foram medidos por hora. Em índices de área foliar (IAF) baixo e médio (V4-V6 e V7-V10), o diaheliotropismo foi levemente mais intenso e frequente nas plantas sem irrigação do que nas irrigadas, e somente nas primeiras horas matinais e últimas horas da tarde. Em R5 (alto IAF), o paraheliotropismo dos trifólios superiores foi predominante e mais intenso em plantas não irrigadas. Os movimentos heliotrópicos se correlacionaram com o ganho de carbono mas não com o ambiente (intensidade de luz ou temperatura), para medidas às 11 horas. 'Embrapa 48' apresenta maior paraheliotropismo do que 'BR 16', em plantas com alto IAF enquanto 'BR 16' apresenta menor plasticidade nas respostas heliotrópicas nas parcelas irrigadas. Apesar de diferenças no heliotropismo, o genótipo e disponibilidade de água não influenciaram a produção de grãos.Termos para indexação: Glycine max, cosseno, diaheliotropismo, irrigação, índice de área foliar, paraheliotropismo.

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“…The analysis of climate change has increasingly attracted the attention of many researchers due to their concerns over the impact of climate change on human and environment in the present and the future. It may cause major changes in climatic variables such as precipitation (Heim 2015) air temperature (Fonseca et al 2016), relative humidity and solar radiation (Haskett et al 2000). Climate change is one of the most serious challenges faced by humanity in the 21st century (Vo et al 2015) where it gives a serious impact to human health, natural ecosystems, agriculture, water resources (Ikhwanuddin et al 2016), occurrence of harmful algae in water (Soon & Ransangan 2016), energy consumption, transport (Jarvis et al 2008), increase of temperature of the region (Bachelet et al 2016), increase of the hydrological cycle (Apurv et al 2015), effects on landslide activity (Rianna et al 2014) and energy consumption (Shibuya & Croxford 2016).…”

Section: Introductionmentioning

confidence: 99%