Sub-Arctic Field Degradation of Metsulfuron-Methyl in Two Alaskan Soils and Microbial Community Composition Effects
| Autor: | Katinna Rodriguez-Baisi, Jasmine J. Hatton, Patrick L. Tomco, Steven S. Seefeldt, Khrystyne N. Duddleston |
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| Rok vydání: | 2020 |
| Předmět: |
Soil health
Environmental Engineering Range (biology) business.industry Ecological Modeling 010501 environmental sciences 01 natural sciences Pollution Metsulfuron-methyl chemistry.chemical_compound Microbial population biology Agronomy chemistry Agriculture Soil water Environmental Chemistry Environmental science Composition (visual arts) business 0105 earth and related environmental sciences Water Science and Technology Woody plant |
| Zdroj: | Water, Air, & Soil Pollution. 231 |
| ISSN: | 1573-2932 0049-6979 |
| DOI: | 10.1007/s11270-020-04528-8 |
| Popis: | Metsulfuron-methyl is a sulfonylurea herbicide, primarily with postemergence activity but also with occasional pre-emergent activity, used for control of weeds and woody plants on agricultural lands and natural areas. The active ingredient is popular in Alaska as Ally XP formulation; little is known about its high-latitude environmental behavior and potential adverse impacts on soil health in cold regions. Our study determined field degradation rates at two experimental farms in Alaska and assessed whether laboratory-incubated soil amended at 1× or 100× label rates would adversely impact microbial community diversity. DT50 was observed at 4.12–5.13 days, with the compound below 1 μg/kg detection limit at 90 days. Interestingly, this is faster than the reported range of field half-lives in the literature (7–42 days). Microbial community composition was not affected by MSM at both 1× and 100× rates. High-latitude regions exhibit extreme summer photoperiods that may exacerbate the MSM degradation/dissipation rate; we postulate that timing of application may have large impacts on MSM attenuation. |
| Databáze: | OpenAIRE |
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