Scientists at Auburn University in Montgomery have found that climate change is accompanied by an increase in carbon dioxide concentrations, which can lead to phosphorus deficiency and lower crop yields in poor countries.
The journal Nature Geoscience points out that the researchers conducted two experiments that lasted 9 and 15 years, respectively – to enrich atmospheric air with carbon dioxide (free-air carbon dioxide enrichment) in rice-growing areas. Although the researchers did not notice any change in the first year, in the final year, soil phosphorus levels were found to have decreased by 26.9 percent after 15 years and by 21 percent after 9 years.
The low level of phosphorus in the soil can be explained by the formation of organic phosphorus in the soil, which is not always absorbed by plants, in addition to its increased removal at harvest. The increase in the conversion of biological, biochemical and chemical phosphorus to plant-available phosphorus during human-induced climate change is not sufficient to compensate for the deficiency resulting from long-term exposure to high levels of carbon dioxide.
The results of this study are cause for concern, scientists say, given the continued rise in carbon dioxide emissions from human activities and its high concentrations in the atmosphere in the future.
Source: Linta. EN