Full TGIF Record # 74793
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Web URL(s):https://acsess.onlinelibrary.wiley.com/doi/10.2136/sssaj2001.6541136x
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https://acsess.onlinelibrary.wiley.com/doi/epdf/10.2136/sssaj2001.6541136x
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Publication Type:
i
Refereed
Author(s):Staddon, W. J.; Locke, M. A.; Zablotowicz, R. M.
Author Affiliation:Staddon: Department Biological Sciences, Eastern Kentucky University, Richmond, KY; Locke and Zablotowicz: USDA-ARS, Southern Weed Science Research Unit, Stoneville, MS
Title:Microbiological characteristics of a vegetative buffer strip soil and degradation and sorption of metolachlor
Section:Soil biology & biochemistry
Other records with the "Soil biology & biochemistry" Section
Source:Soil Science Society of America Journal. Vol. 65, No. 4, July/August 2001, p. 1136-1142.
Publishing Information:Madison, WI: Soil Science Society of America
# of Pages:7
Keywords:TIC Keywords: Microbiology; Filter strips; Buffer zones; Metolachlor; Sorption; Herbicide degradation; Surface runoff; Pesticide fate; Carbon; Enzymes; Fungi; Bacteria; Transport (chemical); Degradation
Abstract/Contents:"Numerous studies have documented efficacy of vegetated buffer strips (VBS) in removing herbicides from surface runoff. Little is known about the fate of herbicides after deposition in buffer strip soil. Soil samples (0- to 2-cm depth) were collected from a buffer strip and an adjacent bare field (BF). Soil organic C was two-fold higher in VBS than in BF, and VBS soil maintained about 0.7 log(10) greater propagule density of total fungi and bacteria and 2 log(10) greater gram-negative bacteria and fluorescent pseudomonads. Corresponding with enhanced microbial popilations, VBS exhibited higher endogenous levels of alkaline phosphatase, tetrazolium chloride dehydrogenase, aryl acylamidase, and fluorescein diacetate hydrolytic activity (1.6- to 3.8-fold greater than BF). Batch studies of metolachlor [2-chloro-N-(2-ethyl-6-methyphenyl)-N-(2-methoxy-1- methylethyl) acetamide] sorption showed greater capacity to sorb metolachlor in VBS soil than in BF (Kd 2.25 vs. 1.60 mL g-1). Soil treated with 14C metolachor (1.25 mg kg-1) was incubated for 46 d in a laboratory study. Limited mineralization (<4%) was observed for both VBS and BF. Less 14C (43%) was extracted from VBS samples 46 d treatment. Extractable fractions consisted primarily of metolachlor, although increasing amounts of polar (e.g., sulfonic acid) and nonpolar metabolites were recovered over time, especially in VBS. Metolachlor half-life was 10 and 23 d for soils from VBS and BF, respectively, attributed to higher levels of organic matter and microbial activity in VBS soils. Data suggest retention and enhanced degradation of metolachlor as it passes through VBS strips may limit further transport."
Language:English
References:57
See Also:Other items relating to: Buffer Zones
Note:Tables
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Staddon, W. J., M. A. Locke, and R. M. Zablotowicz. 2001. Microbiological characteristics of a vegetative buffer strip soil and degradation and sorption of metolachlor. Soil Sci. Soc. Am. J. 65(4):p. 1136-1142.
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Web URL(s):
https://acsess.onlinelibrary.wiley.com/doi/10.2136/sssaj2001.6541136x
    Last checked: 02/28/2024
    Access conditions: Item is within a limited-access website
https://acsess.onlinelibrary.wiley.com/doi/epdf/10.2136/sssaj2001.6541136x
    Last checked: 02/28/2024
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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