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<p>To evaluate the remediation strategies for newly reclaimed, heavily salinized farmland in Xinjiang province, China, a three-year field experiment was conducted comparing different treatments, such as agricultural improvement measures alone, and agricultural measures combined with root zone salt separation, subsurface pipe drainage, or chemical amendments, alongside a natural control. Result findings indicated that the artificial irrigation, evapotranspiration, and groundwater depth were significantly correlated with soil salinity, with irrigation during the growth period showing the strongest negative correlation with plough layer salinity (<i>r</i> = -0.871). However, the use of agricultural measures alone resulted in salt accumulation in the surface layer, whereas the subsurface pipe and chemical treatments successfully shifted salt to the bottom layer. Temporally, desalination efficiency peaked in the second year, particularly for root zone separation and pipe drainage treatments (rates &gt; 44%), before declining in the third year as the total salt efficiency decreased. Overall, the root zone salt separation and subsurface pipe drainage treatments achieved the best performance, with desalination rates of 61.33 and 59.37% in the 0–80&#xa0;cm profile, respectively. While chemical improvement outperformed agricultural measures in the 0–40&#xa0;cm layer (55.32% vs. 45.42%), there was no significant difference between them across the complete 0–80&#xa0;cm profile. Consequently, from the perspective of soil desalination, combining engineering measures, especially root-zone salt isolation or subsurface pipe drainage, with agricultural practices, such as deep tillage and organic fertilizer application may provide an effective approach for improving severely salinized farmland in arid regions. However, large-scale applications should further consider construction cost, maintenance requirements, and long-term economic benefits in years to come.</p>

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Analysis of salt change and desalination effect of saline soil in Xinjiang under the influence of multiple measures

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年6月21日

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  • Ling Du,
  • Daqian Zhang,
  • Yingying Xu,
  • Yin Sun,
  • Jianjiang Li,
  • Ankang Huang

摘要

To evaluate the remediation strategies for newly reclaimed, heavily salinized farmland in Xinjiang province, China, a three-year field experiment was conducted comparing different treatments, such as agricultural improvement measures alone, and agricultural measures combined with root zone salt separation, subsurface pipe drainage, or chemical amendments, alongside a natural control. Result findings indicated that the artificial irrigation, evapotranspiration, and groundwater depth were significantly correlated with soil salinity, with irrigation during the growth period showing the strongest negative correlation with plough layer salinity (r = -0.871). However, the use of agricultural measures alone resulted in salt accumulation in the surface layer, whereas the subsurface pipe and chemical treatments successfully shifted salt to the bottom layer. Temporally, desalination efficiency peaked in the second year, particularly for root zone separation and pipe drainage treatments (rates > 44%), before declining in the third year as the total salt efficiency decreased. Overall, the root zone salt separation and subsurface pipe drainage treatments achieved the best performance, with desalination rates of 61.33 and 59.37% in the 0–80 cm profile, respectively. While chemical improvement outperformed agricultural measures in the 0–40 cm layer (55.32% vs. 45.42%), there was no significant difference between them across the complete 0–80 cm profile. Consequently, from the perspective of soil desalination, combining engineering measures, especially root-zone salt isolation or subsurface pipe drainage, with agricultural practices, such as deep tillage and organic fertilizer application may provide an effective approach for improving severely salinized farmland in arid regions. However, large-scale applications should further consider construction cost, maintenance requirements, and long-term economic benefits in years to come.