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Food supply

Enhancing Crop Yields on Saline-Alkali Soils Crucial for Global Food Security

Strategic Insights

— 2 min read

Investigations into landscape ecology have revealed a critical measure for ensuring global food security: enhancing crop yields on saline-alkali soils. As the global food crisis worsens, wheat, being one of the world's most important staple crops, is particularly sensitive to phosphorus availability. Researchers at the Shandong Academy of Agricultural Sciences have made significant findings in this area, specifically adapting phosphorus management practices to saline-alkali environments for sustainable wheat production.

Key Takeaways:

  • Researchers at the Shandong Academy of Agricultural Sciences conducted an experiment to investigate the effects of phosphorus application on wheat yield, soil nutrient dynamics, and nutrient uptake efficiency under saline-alkali stress.
  • The experiment was designed with varying phosphorus fertilizer application rates based on P2O5 content (0, 60 kg/hm2, 120 kg/hm2, 180 kg/hm2, and 240 kg/hm2), and the results indicated that the highest yield (6355 kg·hm-2) was achieved when the phosphorus application rate reached 120 kg/hm2, with an increase of 47.2-63.5% compared to the control.
  • The innovations of this study lie in its focus on phosphorus management specifically under saline-alkali soil conditions, its integration of soil nutrient changes and plant physiological responses, and its identification of the optimal phosphorus application threshold for balancing yield improvement and nutrient efficiency.
  • The findings provide a scientific basis for refining phosphorus fertilization strategies to sustainably boost wheat productivity in saline-alkali environments.
  • The experiment was conducted at the Yellow River Delta in China, and the research was supported by the National Natural Science Foundation of China, the Key R&D Program of Shandong Province, China, the Technical System of Ecological Agriculture of Modern Agricultural Technology System in Shandong Province, and the Taishan Scholars Program.

Statistics:

  • The highest wheat yield (6355 kg·hm-2) was achieved when the phosphorus application rate reached 120 kg/hm2, with an increase of 47.2-63.5% compared to the control.
  • The biomass, thousand-grain weight, and the absorption of nitrogen, phosphorus, and potassium in both straw and grains exhibited the same increasing-then-decreasing trend.
  • Mechanistic analysis revealed that phosphorus fertilization enhanced soil alkali-hydrolyzable nitrogen, available phosphorus, and available potassium, thereby promoting nutrient uptake and ultimately improving grain yield.

Sources:

  • Jinan, People's Republic of China, VerticalNews
  • National Natural Science Foundation of China
  • Key R&D Program of Shandong Province, China
  • Technical System of Ecological Agriculture of Modern Agricultural Technology System in Shandong Province
  • Taishan Scholars Program
  • Land, 2025,14(6):1241. (Land - http://www.mdpi.com/journal/land)
  • MDPI AG
  • China Weekly News, July 8, 2025; p 423.

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