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| Content analysis and pollution risk assessment of heavy metal in common fertilizers in typical north vegetable fields |
| Received:October 21, 2019 |
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| KeyWord:fertilizer;heavy metal;analysis;evaluation |
| Author Name | Affiliation | E-mail | | JIANG Nan | College of Resources and Environment, Key Laboratory of Agricultural Environment in Universities of Shandong, Shandong Agricultural University, Tai'an 271018, China | | | PING Ling-wen | College of Resources and Environment, Key Laboratory of Agricultural Environment in Universities of Shandong, Shandong Agricultural University, Tai'an 271018, China | | | JI Xiao-hui | College of Resources and Environment, Key Laboratory of Agricultural Environment in Universities of Shandong, Shandong Agricultural University, Tai'an 271018, China | | | LI Xian-xu | College of Resources and Environment, Key Laboratory of Agricultural Environment in Universities of Shandong, Shandong Agricultural University, Tai'an 271018, China | | | SONG Pei-pei | College of Resources and Environment, Key Laboratory of Agricultural Environment in Universities of Shandong, Shandong Agricultural University, Tai'an 271018, China | | | ZHU Lu-sheng | College of Resources and Environment, Key Laboratory of Agricultural Environment in Universities of Shandong, Shandong Agricultural University, Tai'an 271018, China | | | WANG Jun | College of Resources and Environment, Key Laboratory of Agricultural Environment in Universities of Shandong, Shandong Agricultural University, Tai'an 271018, China | jwang@sdau.edu.cn |
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| Abstract: |
| One of the main sources of heavy metals in farmland is the agricultural inputs, and long-term application of fertilizers with high level of heavy metals may lead to the accumulation of heavy metals in soil. In order to analyze heavy metals of the representative fertilizers of vegetable fields in the north of China, 268 representative fertilizer samples were collected from typical north vegetable fields, which are organic fertilizers, water-soluble fertilizers, microbial fertilizers, bio-organic fertilizers and compound fertilizers. In this study, heavy metals such as arsenic, cadmium, lead, chromium, and mercury in fertilizers were analyzed. Detailed observation indicated that five kinds of heavy metals were detected in almost all fertilizers, and Pb in organic fertilizers was the highest with 28.16 mg·kg-1, followed by Cr, As, Cd, and Hg respectively. Compared with the national fertilizer limit standards, the excessive percentage of Cd was 0.63% in organic fertilizers. Among the other four fertilizers, the highest Cd occurred in water-soluble fertilizers and the highest As, Pb, Cr and Hg were found in bioorganic fertilizers. The excessive percentage of As, Pb and Cd in bio-organic fertilizers were 40%, 20% and 10% respectively. As and Hg did not exceed the standards. Meanwhile, the level of heavy metal pollution was evaluated by the Nemerow index method. The results indicated that the content of heavy metal in these typical fertilizers was at the clean level, while the comprehensive pollution index of Pb and Cd reached to 0.62 and 0.53 respectively. Based on these results, more attention should be paid to heavy metals contamination in fertilizers. |
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