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| Accumulation and ecological risk of heavy metals in greenhouse soil under long-term fertilization |
| Received:March 18, 2019 |
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| KeyWord:long-term fertilization;greenhouse soil;heavy metal;pollution assessment;ecological risk assessment |
| Author Name | Affiliation | E-mail | | WO Xi-hui | College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China | | | YANG Li-juan | College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China | | | CAO Ting-yue | College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China | | | LI Jun | College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China | syau_lijun@163.com |
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| Abstract: |
| In order to understand the content and pollution status of heavy metals in greenhouse soil while improving it under different longterm fertilization treatments, this study used fertilized greenhouse soil that was established in 2009 to study the effects of different fertilization treatments on the accumulation of heavy metals(Cd, Cr, Cu, Ni, Pb, Zn)in the soil. An assessment of heavy metal pollution and potential ecological risk was also conducted. The results showed that of all the heavy metals, Cd was present under all the treatments and caused pollution. The exception was CK. The pollution was most severe when chicken manure, straw, K2SO4, lime and compound fertilizer were applied together, causing comprehensive soil pollution and ecological risk. The accumulation rate of Cd, Cr and Zn was highest when five kinds of fertilizers were applied together. The highest accumulation rate of Cu, Ni and Pb was shown when chicken manure, straw and compound fertilizer were applied together. The soil was polluted with Zn after nearly 20 years when five kinds of fertilizers were applied together, and substantial soil pollution and ecological risk of Cd would increase in the next 20 years. The long-term application of different combinations of five kinds of fertilizers can lead to the accumulation of, and pollution by, heavy metals. This will simultaneously increase ecological risk. |
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