Rising temperatures can negate CO2 fertilization effects on global staple crop yields: A meta-regression analysis

Zhu, Chunwu; Wolf, Julie; Zhang, Jishuang; Anderegg, William R.L.; Bunce, James A.; Ziska, Lewis H.

doi:10.1016/j.agrformet.2023.109737

Cited by 3 publications

(3 citation statements)

References 59 publications

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“…France is located at the interface between southern Europe, where agricultural production has been projected to be severely reduced by 2050 due to climate change, and northern Europe, where compensation by means of CO 2 fertilisation could, on the contrary, improve production 9 , 10 , 73 . CO 2 experimental results from a variety of devices (controlled growth chambers, greenhouses, closed-top or open-top chambers, or Free‐Air CO 2 Enrichment experiments) differ widely from each other and from the results of simulations 74 . Moreover they are scarce for high atmospheric CO 2 levels, above 700 ppm, whereas the projected atmospheric [CO 2 ] level in 2100 is of the order of 1300 ppm.…”

Section: Discussionmentioning

confidence: 98%

Mapping the race between crop phenology and climate risks for wheat in France under climate change

Le Roux,

Furusho-Percot,

Deswarte

et al. 2024

Sci Rep

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Climate change threatens food security by affecting the productivity of major cereal crops. To date, agroclimatic risk projections through indicators have focused on expected hazards exposure during the crop’s current vulnerable seasons, without considering the non-stationarity of their phenology under evolving climatic conditions. We propose a new method for spatially classifying agroclimatic risks for wheat, combining high-resolution climatic data with a wheat’s phenological model. The method is implemented for French wheat involving three GCM-RCM model pairs and two emission scenarios. We found that the precocity of phenological stages allows wheat to avoid periods of water deficit in the near future. Nevertheless, in the coming decades the emergence of heat stress and increasing water deficit will deteriorate wheat cultivation over the French territory. Projections show the appearance of combined risks of heat and water deficit up to 4 years per decade under the RCP 8.5 scenario. The proposed method provides a deep level of information that enables regional adaptation strategies: the nature of the risk, its temporal and spatial occurrence, and its potential combination with other risks. It’s a first step towards identifying potential sites for breeding crop varieties to increase the resilience of agricultural systems.

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Section: Discussionmentioning

confidence: 98%

Mapping the race between crop phenology and climate risks for wheat in France under climate change

Le Roux,

Furusho-Percot,

Deswarte

et al. 2024

Sci Rep

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“…It is clear that at present, the CO 2 deficiency (400 ppm instead of 600-750 ppm) is the limiting factor for achieving greater photosynthesis and crop production [45]. Therefore, the increase in CO 2 levels in the atmosphere has been found to increase shoot growth and production, which is often referred to as "CO 2 fertilization effect" [45,47,48] and improves the sugar accumulation in the fruits as well as their weight and size, while it may alter the nutraceutical composition of the fruit [45,48]. Orange trees grown for many years at eCO 2 levels exhibited a 70% increase in total biomass compared to those grown under ambient conditions due to increased fruit production, branching, and trunk and branch thickness [49].…”

Section: Impact Of Climate Change On Plant Growthmentioning

confidence: 99%

“…Nonetheless, as eCO 2 induces a rise in global temperature, and heat stress is among the factors limiting plant productivity, their combined effect is expected to induce significant changes in fruit tree physiology and productivity. As eCO 2 reduces stomatal conductance, it simultaneously reduces the cooling potential of transpiration, which, under elevated air temperatures (supra-optimal temperature), will lead to increased leaf temperatures and reductions in growth rates [47]. Under a mild temperature increase, though, it may confer tolerance to drying, as it reduces water stomatal losses [45,65].…”

Section: Impact Of Climate Change On Plant Growthmentioning

confidence: 99%

Climate Change Challenges in Temperate and Sub-Tropical Fruit Tree Cultivation

Roussos

2024

Encyclopedia

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In the last few years, the world has experienced the impacts of climate change, such as elevated mean annual temperature, extreme weather events, drought, etc. Among living organisms, perennial plant species are the ones mostly exposed to climate change impacts, as they may experience different extreme events within the same year, such as flooding during some periods and drought in summer months, extremely low temperatures in winter but excessively high temperatures in summer, etc. Climate change affects a range of physiological functions of temperate fruit and nut tree species, such as their phenophases, bud dormancy release and vernalization, pollination and fruit set, fruit growth and quality, as well as bud sprouting and growth initiation. Besides these, the impact of climate change on pests, diseases, and weeds may generate significant negative interactions with tree physiology, threatening food production, food safety, and human welfare. In the present manuscript, a general aspect of climate change impacts on fruits’ and nut trees’ physiological functions is described and commented on.

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