Economics of salt‐induced land degradation and restoration

作者：Muhammad Farhan Qadir, Emmanuelle Quillérou, Vinay Nangia, Ghulam Murtaza, Murari Singh, Richard J. Thomas, Pay Drechsel, Andrew Noble · 发表于：Natural Resources Forum · 年份：2014 · DOI：10.1111/1477-8947.12054 · 被引用次数：1330 · 研究领域：Soil Geostatistics and Mapping

Abstract Food security concerns and the scarcity of new productive land have put productivity enhancement of degraded lands back on the political agenda. In such a context, salt‐affected lands are a valuable resource that cannot be neglected nor easily abandoned even with their lower crop yields, especially in areas where significant investments have already been made in irrigation and drainage infrastructure. A review of previous studies shows a very limited number of highly variable estimates of the costs of salt‐induced land degradation combined with methodological and contextual differences. Simple extrapolation suggests that the global annual cost of salt‐induced land degradation in irrigated areas could be US $ 27.3 billion because of lost crop production. We present selected case studies that highlight the potential for economic and environmental benefits of taking action to remediate salt‐affected lands. The findings indicate that it can be cost‐effective to invest in sustainable land management in countries confronting salt‐induced land degradation. Such investments in effective remediation of salt‐affected lands should form part of a broader strategy for food security and be defined in national action plans. This broader strategy is required to ensure the identification and effective removal of barriers to the adoption of sustainable land management, such as perverse subsidies. Whereas reversing salt‐induced land degradation would require several years, interim sali...