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Related Experiment Video

Updated: Jun 4, 2025

Wastewater Irrigation Impacts on Soil Hydraulic Conductivity: Coupled Field Sampling and Laboratory Determination of Saturated Hydraulic Conductivity
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Consecutive high-efficient water-saving irrigation increase crop yield and decrease soil salinity through

Feifei Jia1, Wenhao Li1, Bo Zhou2

  • 1College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi 832000, Xinjiang, China.

The Science of the Total Environment
|January 1, 2025
PubMed
Summary

Long-term high-efficient water-saving irrigation (HEI) significantly boosts cotton yield and reduces soil salinity by enhancing soil bacterial diversity and function over 25 years. This sustainable approach improves food security and ecological stability in saline areas.

Keywords:
Bacterial communitiesCottonDrip irrigationSaline soilSoil salinity

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Area of Science:

  • Agricultural Science
  • Soil Microbiology
  • Environmental Science

Background:

  • Salinization affects 10% of global arable land, reducing crop yields and threatening food security.
  • High-efficient water-saving irrigation (HEI) shows promise for improving crop yields in saline soils.
  • The microbial mechanisms underlying HEI's benefits in salinized soils remain unclear.

Purpose of the Study:

  • To investigate the long-term effects of consecutive HEI on soil microbial communities and cotton yield in saline oasis areas.
  • To elucidate the microbial pathways involved in salinity reduction and yield enhancement under HEI.
  • To assess the impact of 25 years of HEI on soil properties and bacterial community dynamics.

Main Methods:

  • A 25-year field study was conducted in saline oasis areas using consecutive HEI.
  • 16S rRNA high-throughput sequencing was employed to analyze soil bacterial community structure and diversity.
  • Structural equation modeling was used to determine the relationships between microbial communities, soil properties, and crop performance.

Main Results:

  • HEI significantly increased soil bacterial diversity, cotton survival rate, and yield over 25 years.
  • Soil salinity, sodium absorption ratio, and specific ion concentrations were substantially reduced.
  • Specific bacterial phyla (Acidobacteriota, Nitrospirota, Myxococcota) enhanced yield via nitrogen fixation, while others (Bacteroidota, Firmicutes) reduced salinity through nitrate reduction.

Conclusions:

  • Long-term HEI application effectively improves soil health and crop productivity in saline environments.
  • Soil bacterial communities play a crucial role in mitigating salinity stress and promoting crop growth under HEI.
  • The study highlights the potential of HEI as a sustainable strategy for managing salinized agricultural lands and ensuring food security.