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| Soil Layer Replacement Reduced Fomesafen Residue in Soil |
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| KeyWord:soil layer replacement; fomsafen; soil; residue |
| Author Name | Affiliation | | ZU Yong-ping | Northeast Agricultural University, Agronomy College, Harbin 150030, China | | BAI Jie | Northeast Agricultural University, Agronomy College, Harbin 150030, China | | ZHANG Zhong-liang | Northeast Agricultural University, Agronomy College, Harbin 150030, China | | JIAO Zi-zhou | Jilin Entry-Exit Inspection and Quarantine Bureau, Jilin 130062, China | | LI Xiang-quan | Northeast Agricultural University, Agronomy College, Harbin 150030, China | | TAO Bo | Northeast Agricultural University, Agronomy College, Harbin 150030, China |
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| Abstract: |
| Replacing surface with subsoil could enhance degradation of organic pollutants in soils. In this study, fomesafen degradation, microbial dynamics and sugar beet damages were investigated under different tillage methods using high performance liquid chromatography and biological assay. Residue of fomesafen in soil decreased by 79% under soil layer replacement, whereas by 46% under the conventional tillage. Compared with the conventional tillage, the number of fungi in 0 cm to 10 cm, 10 cm to 20 cm, and 20 cm to 30 cm soil layers and actinomycetes in 0 cm to 10 cm soil layer were greater under soil layer replacement. The recovery rates of soil bacteria, fungi and actinomycetes were 4%, 29% and 12%, respectively. In soil layer replacement treatment, the emergence rate, plant height, chlorophyll and fresh weight of sugar beet increased by 12.89%, 58.50%, 72.29% and 41.78%, respectively, compared with the conventional tillage. These results suggest that soil layer replacement could be an effective way to remediate soils contaminated with fomesafen. |
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