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| Influences of biochar, calcium magnesium phosphate and manure on Cd accumulation in Panax Notoginseng |
| Received:March 17, 2016 |
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| KeyWord:biochar;Panax Notoginseng;soil;available Cd |
| Author Name | Affiliation | E-mail | | CHEN Jian-qing | Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, China | | | GUO Dong | Infinitus, Guangzhou 510623, China | | | CHEN De | Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, China | | | LI Lian-qing | Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, China | lqli@njau.edu.cn | | PAN Gen-xing | Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, China | |
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| Abstract: |
| A field trial was conducted to investigate the effects of biochar, calcium magnesium phosphate and manure on Cd uptake and accumulation by Panax Notoginseng in Yunnan Province. The results showed that biochar and calcium magnesium phosphate significantly increased the taproot biomass by 48.7% and 50.4% compared with control. Biochar and calcium magnesium phosphate significantly decreased Cd concentration in taproot, rhizome, leaf and stem by 25.4%~43.6%, 40.2%~40.9%, 34.3%~51.2% and 33.0%~33.5%. It may be attributed to the decreased acidy of soil, the increased soil organic matter and CEC, which resulted in decreased soil exchangeable Cd, with the application of biochar and calcium magnesium phosphate. The changes of biomass and Cd accumulation of Panax Notoginseng in manure treatment are not significantly compared to CK. The accumulation coefficients(AF) of Cd in Panax Notoginseng were decreased by addition of biochar and calcium magnesium phosphate, respectively, but the Cd transfer coefficient(TF) of each part of Panax Notoginseng were not significant in biochar and calcium magnesium phosphate treatments. The AF of fibril root is about 2.84~4.64 in all treatments, but the AF and TF of any parts of Panax Notoginseng are less than 1.0 except fibril root. It means that the fibril root can accumulate Cd from contaminated soil easily, but it's difficult to transport the accumulated Cd from fibril root to other parts. The application of biochar and calcium magnesium phosphate could be an environmentally friendly and efficient way to remediate Cd contaminated acidic soils and improve the safety of Panax Notoginseng. |
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