Abstract
AbstractWe investigated the individual and synergistic impact of gypsum, elemental sulfur, vermicompost, biochar, and microbial inoculation on soil health improvement in degrading calcareous saline-sodic soils. We developed Linear and nonlinear soil health quantification frameworks to assess the efficacy of remedial practices. The combined inoculated chemical and organic treatments; gypsum + vermicompost and elemental sulfur + vermicompost with 134% (0.29 versus 0.68) and 116% (0.29 versus 0.62) increases in nonlinear index, significantly increased the efficacy of amendments compared with control. An increase in the overall soil health index ranged between 12 to 134%. Microbial inoculation further enhanced the impact of treatments on soil health. Soil health properties included in the indexes explained 29 to 87% of the variance in wheat growth. The findings bring insight into the cost-effective and environmentally sustainable practices to recover degraded saline-sodic soils. Furthermore, the introduced soil health indexes offer a quantitative evaluation of soil remediation strategies.
Publisher
Springer Science and Business Media LLC
Subject
General Earth and Planetary Sciences,General Environmental Science
Reference83 articles.
1. Kopittke, P. M., Menzies, N. W., Wang, P., McKenna, B. A. & Lombi, E. Soil and the intensification of agriculture for global food security. Environ. Int. 132, 105078 (2019).
2. Hossain, M. S. Present scenario of global salt affected soils, its management and importance of salinity research. Int. Res. J. Biol. Sci 1, 1–3 (2019).
3. Ivushkin, K. et al. Global mapping of soil salinity change. Remote Sensing Environ. 231, 111260 (2019).
4. Shahid, S. A., Zaman, M. & Heng, L. (eds.) in Guideline for Salinity Assessment, Mitigation and Adaptation Using Nuclear and Related Techniques 43–53 (Springer, 2018).
5. Puy, A., Lo Piano, S. & Saltelli, A. Current models underestimate future irrigated areas. Geophys. Res. Lett. 47, e2020GL087360 (2020).