Sustaining Remediation of Secondary Saline and/or Sodic Soils in Conjunction with Field Management pp. 359-386
Authors: (Fa Hu Li, Pei Ling Yang, Jin Rong Guo, China Agricultural University, Beijing, China)
Abstract: Secondary saline and/or sodic soils in irrigation regions constrains crop yield, and their reclamation is important to meet the need of an increasing population in many countries where arable acreage is limited. Because of their relatively low salinity/sodicity levels compared with primary saline/sodic soils and the high expenditure of traditional reclamation activity, secondary saline/sodic soils should adopt different reclamation strategies and techniques. To improve soil structure and maintain a reduction or at least balance of salts in secondary saline/sodic soils is a base for sustainable production activity of agriculture. The strategies and techniques on the sustainable nonchemical remediation of secondary saline/sodic soils, combining with farmland management measures such as irrigation and drainage, field engineering, agronomy, and rainfall utilization were discussed in the article. The status quo of remediation of secondary saline/sodic soils in China and the related field management measures were also presented. Lots of experimental results and reclamation practical activities indicated that by the aid of suitable management measures, the phytoremediation or bioremediation of secondary saline/sodic soils without lots of chemical amendment application is feasible for technology, acceptable to farmers for economic benefit, and sustainable to environments.
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