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Related Concept Videos

The Phosphorus Cycle01:21

The Phosphorus Cycle

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Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
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The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
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Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment
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More efficient phosphorus use can avoid cropland expansion.

José M Mogollón1, Alexander F Bouwman2,3,4, Arthur H W Beusen2,3

  • 1Institute of Environmental Sciences (CML), Leiden University, Leiden, the Netherlands. j.m.mogollon@cml.leidenuniv.nl.

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Summary

Cropland expansion to meet future food demand can be avoided by increasing phosphorus (P) fertilizer use by less than 7% and improving soil P management. This strategy boosts crop productivity and reduces environmental P pollution.

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Area of Science:

  • Agricultural Science
  • Environmental Science
  • Soil Science

Background:

  • Global food demand necessitates significant increases in agricultural production.
  • Projections indicate a need for approximately 500 million hectares of new arable land by 2050.
  • Current agricultural practices may lead to nutrient depletion and environmental P loss.

Purpose of the Study:

  • To assess the impact of phosphorus (P) fertilizer management on avoiding cropland expansion.
  • To evaluate the potential of agronomic improvements in P use efficiency.
  • To quantify the effects of different scenarios on P demand and environmental P outflows.

Main Methods:

  • Utilized a dynamic phosphorus (P) pool simulator.
  • Analyzed various socioeconomic scenarios for future agricultural development.
  • Compared scenarios with and without increased P fertilizer application and improved agronomic practices.

Main Results:

  • Avoiding cropland expansion requires less than 7% additional cumulative P fertilizer (2006-2050) compared to expansion scenarios.
  • Increased P fertilizer is most effective in nutrient-depleted soils, particularly in sub-Saharan Africa.
  • Agronomic improvements can reduce P losses to ecosystems and lower overall P fertilizer demand.

Conclusions:

  • Strategic application of phosphorus fertilizer and improved soil P management can prevent extensive cropland expansion.
  • Enhanced P use efficiency in agriculture is crucial for sustainable intensification and environmental protection.
  • Investments in agronomic research and practices are vital for meeting future food security while minimizing ecological impact.