ORIGINAL RESEARCH
Effect of Arbuscular Mycorrhizal Fungi on Switchgrass Growth and Mineral Nutrition in Cadmium-Contaminated Soil
Hong Sun 1  
,  
Jintao Fu 2
,  
Fuyu Yang 2  
 
 
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1
College of Tea, Guizhou University, Guizhou, PR China
2
Department of Grassland Science, College of Animal Science and Technology, China Agricultural University, Beijing, PR China
CORRESPONDING AUTHOR
Fuyu Yang   

China Agricultural University, Department of Grassland Science, College of Animal Science and Technology, China Agricultural University, Yuanmingyuan West Road 2#, Haidian District, 100193 Beijing, China
Online publication date: 2019-10-07
Publication date: 2020-01-16
Submission date: 2018-01-06
Final revision date: 2018-03-26
Acceptance date: 2018-08-06
 
Pol. J. Environ. Stud. 2020;29(2):1369–1377
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ABSTRACT
The effect of arbuscular mycorrhizal fungi (AMF) and cadmium (Cd) treatment on switchgrass (Panicum virgatum) growth, Cd accumulation, mineral element concentrations and soil Cd bioavailability were investigated in a greenhouse experiment. The results showed that switchgrass biomass increased with AMF inoculation at all Cd levels except the 40 mg/kg Cd treatment. AMF decreased the shoots and roots Cd accumulation for the 10 and 40 mg/kg Cd treatments and limited Cd translocation from root to shoot, but enhanced the phosphorus concentrations for all Cd treatments. Furthermore, the presence of AMF reduced the reducible-extractable and acid-extractable Cd concentrations in the 10 and 40 mg/kg Cd soils, respectively. AMF inoculation significantly increased the shoot Ca, Mg, K, and Na concentrations without Cd addition; it decreased Ca, Mg, and Zn concentrations in the roots and Fe in the shoots with the low Cd addition; it increased K, Mg, and Na in the shoots with the 10 mg/kg Cd addition; and it increased Ca and Mg in the shoots and Na in the roots with the 40 mg/kg Cd addition. In summary, AMF inoculation decreased Cd absorption and translocation, improved P absorption, and took a different strategy to elements absorption under different Cd levels. The improved biomass and decreased Cd concentrations with AMF assistance increased the potential for switchgrass use as a phytoremediation and bioenergy crop in a contamination site.
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