Critical knowledge gaps and research priorities in global soil salinity

Jan W. Hopmans, A. S. Qureshi, I. Kisekka, R. Munns, S. R. Grattan, P. Rengasamy, A. Ben-Gal, S. Assouline, M. Javaux, P. S. Minhas, P. A.C. Raats, T. H. Skaggs, G. Wang, Q. De Jong van Lier, H. Jiao, R. S. Lavado, N. Lazarovitch, B. Li, E. Taleisnik

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

54 Scopus citations

Abstract

Approximately 1 billion ha of the global land surface is currently salt-affected, representing about 7% of the earth's land surface. Whereas most of it results from natural geochemical processes, an estimated 30% of irrigated lands globally are salt-affected through secondary human-induced salinization. Application of lower quality, alternative irrigation water is further threatening expansion of the areal extent of soil salinity, in addition to climate change causing increases of salt-water intrusion in coastal areas and increasing crop water requirements. The reduced availability of freshwater resources for irrigation, the continued reduction of the world's cultivated agricultural area by land degradation and urbanization, in conjunction with a growing world population further complicates the problem seeking sustainable solutions. This scoping review prioritizes critical knowledge gaps and makes recommendations for 10 priorities in soil salinity research toward a sustainable and productive agricultural system for a food-secure future world. We also include basin-specific case studies that illustrate progress of the world's major irrigated areas in addressing impacts of soil salinization. By identifying research priorities, we seek to accelerate enhanced research funding to bring new knowledge and innovative solutions toward mitigation of soil salinity impacts. We further want to inspire the science community to develop new directions in salinity research.

Original languageEnglish
Title of host publicationAdvances in Agronomy
EditorsDonald L. Sparks
PublisherAcademic Press Inc.
Pages1-191
Number of pages191
ISBN (Print)9780128245903
DOIs
StatePublished - 1 Jan 2021

Publication series

NameAdvances in Agronomy
Volume169
ISSN (Print)0065-2113

Keywords

  • Basin-specific progress in soil salinity research around the world
  • Knowledge gaps in soil salinity
  • Recommendations toward sustainable irrigated agriculture
  • Research challenging and priorities
  • Soil salinity review

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Soil Science

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