Effects of Different Treatment Methods on Soil Nutrients of Saline–Alkaline Soil and Dandelion Growth

DOI: https://doi.org/10.62517/jlsa.202607209

Author(s)

Ruiyuan Jin, Xunuo Zhao, Yibo Wang, Weijia Meng, Yanjun Ai*

Affiliation(s)

College of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei, China *Corresponding Author

Abstract

Soil salinization and alkalization seriously restrict agricultural sustainability and food security. To improve the low fertility and poor structure of saline–alkaline soil, a pot experiment was conducted using iron tailings, biochar, and microbial inoculants (Bacillus megaterium and Trichoderma harzianum). Their effects on soil pH and nutrient contents were evaluated. The results showed that all treatments improved saline–alkaline soil properties. W30 (30% iron tailings) exhibited the strongest alkalinity-reduction effect, reducing soil pH to 8.17. W20s (20% iron tailings + biochar) showed the greatest nutrient enhancement, increasing soil organic carbon by 9.84% and available nitrogen by 72.42% compared with CK. W20 (20% iron tailings) produced the highest available phosphorus content. These findings indicate that the combined application of iron tailings, biochar, and microbial inoculants exerted microbial specificity and dosage-threshold effects on saline–alkaline soil properties. Appropriate amendment rates can effectively reduce soil alkalinity and improve nutrient availability.

Keywords

Saline–Alkaline Soil; Iron Tailings; Biochar; Microbial Inoculants; Nutrient Availability; Ecological Restoration

References

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