Compost application increases the ecological dose values in a non-calcareous agricultural soil contaminated with cadmium
- PDF / 1,887,283 Bytes
- 14 Pages / 595.276 x 790.866 pts Page_size
- 29 Downloads / 202 Views
Compost application increases the ecological dose values in a non-calcareous agricultural soil contaminated with cadmium Fayez Raiesi
1
●
Leila Dayani1
1234567890();,:
1234567890();,:
Accepted: 29 September 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Soil cadmium (Cd) pollution resulting from anthropogenic activities has become a major concern for microbial and biochemical functions that are critical for soil quality and ecosystem sustainability. Organic amendments can reduce Cd toxicity to the microbial community and enzymatic activity in Cd-polluted soils and thus would increase the ecological dose (ED) values. However, there has been less focus on the effect of organic amendments on microbial and biochemical responses to Cd toxicity in non-calcareous soils using the concept ED. The aim of this study was to assess the impact of compost application on microbial activity, microbial biomass, turnover rates of carbon and nitrogen, and enzymatic activities as the key ecological functions in a non-calcareous soil spiked with different Cd concentrations (0–200 mg kg−1). Results showed that soil amendment with compost decreased Cd availability by 48–76%, depending on the total soil Cd content. The application of compost reduced the negative influence of Cd eco-toxicity on most soil microbial and biochemical functions by 20–122%, depending on the Cd level and the assay itself. The ED values, derived from the sigmoidal dose-response and kinetic models, were 1.10- to 2.24-fold higher in the compost-amended soils than the unamended control soils at all Cd levels. In conclusion, the potential risks associated with high levels of Cd pollution can be alleviated for microbial and biochemical indicators of soil quality/health with application of 2500 kg ha−1 compost as a cost-effective source of organic matter to non-calcareous soils. The findings would have some useful implications for organic matter-limited non-calcareous soils polluted with Cd. Keywords Organic amendments Cadmium pollution Soil quality Microbial functions Eco-toxicity modification ●
●
Introduction Soil microbial communities are the main driving forces responsible for the long-term sustainability of ecosystems because they regulate the formation and decomposition of soil organic matter (SOM) and plant residues, the cycling and availability of essential nutrients, carbon (C) cycling and sequestration, biodegradation of many harmful organic pollutants as well as biotransformation of toxic metals in
Supplementary information The online version of this article (https:// doi.org/10.1007/s10646-020-02286-1) contains supplementary material, which is available to authorized users. * Fayez Raiesi [email protected] 1
Department of Soil Science and Engineering, Faculty of Agriculture, Shahrekord University, P.O. Box 115, Shahrekord, Iran
●
●
the soil (Nannipieri et al. 2003; Soares and Rousk 2019; Xu et al. 2019). Microbial communities are a potential source of enzyme release and production in the soil environment, which
Data Loading...
