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| DOI: | 10.21273/HORTSCI.36.5.837 |
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| Web URL(s): | https://journals.ashs.org/hortsci/view/journals/hortsci/36/5/article-p837.xml
Last checked: 11/15/2019
Requires: PDF Reader
Notes: Item is within a single large file; Abstract only |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | File, S. L.;
Gilliam, Charles H.;
Reynolds, Daniel B.;
Knight, P. R. |
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| Author Affiliation: | Gilliam: Auburn University, Auburn, AL; and File, Reynolds, and Knight: Mississippi State University, MS |
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| Title: | The effect of mulching systems on herbicide mobility |
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| Section: | Floriculture/Ornamentals
Other records with the "Floriculture/Ornamentals" Section
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| Meeting Info.: | Fort Worth, TX; January 27-29, 2001 |
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| Source: | HortScience. Vol. 36, No. 5, August 2001, p. 849. |
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| Publishing Information: | Alexandria, VA: American Society for Horticultural Science |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Mulching; Herbicides; Mobility; Pesticide fate; Pendimethalin; Isoxaben; Metolachlor; Leachates
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| Abstract/Contents: | "There is concern about fate of herbicides and potential accumulation in surface and groundwater supplies. Irrigated sandy soils have a high potential for certain herbicides to leach into groundwater. Therefore, the objective of this research was to evaluate the mobility of pendmethalin, isoxaben, and metolachlor when applied over recycled newspaper pellets, bark, and pine straw mulches vs. bare soil. Acetate tubing (5 cm x 30 cm) was filled with a sandy loam soil in 100-g increments. Two inches of mulch were placed over the soil. Columns were irrigated with 250 mL of deionized water under saturated-flow conditions and then allowed to drain for 24 hours before treatments were applied. All 14C-labeled herbicides were applied in 1000 L of deionized water to each column in a cross-hatch pattern. Following herbicide application, columns drained for 24 hours before leachate was recorded and subsamples taken. Two 1-L aliquots from each leachate sample were combined with scintillation cocktail and analyzed by liquid scintillation spectrometry. Columns were then frozen and sectioned with a 2-inch PVC cutter into the following increments: mulch if applicable, 0-5, 5-10, 10-15, 15-20, and 20-25 cm. Air-dried sections were mixed thoroughly, and three 2-g samples were taken from each soil section and combusted with a biological oxidizer at 9000°C for 4 min. Mobility was determined by the percentage of herbicide collected at different soil depths and in the leachate relative to the amount applied. This 2x2 factorial experiment, consisting of four replications, was conducted twice. All data were subjected to analysis of variance to test for interactions between herbicide and mulch. All three herbicides had >85% recovery and showed no differences among herbicide treatments. Less 14C-herbicide moved from the point of application when a mulch was applied; newspaper pellets adsorbed more 14C-herbicide compared to any other mulch. The 14C-herbicide recovery was lower with pine bark compared to any other mulch. Compared with pendimethalin and isoxaben, metolachlor leached more from the mulch layer into the soil profile, indicating a higher potential for leaching. Therefore, we can conclude that newspaper pellets, pine bark, and pine straw did reduce leaching of pendimethalin, isoxaben, and metolachlor when compared to bare soil." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
File, S. L., C. H. Gilliam, D. B. Reynolds, and P. R. Knight. 2001. The effect of mulching systems on herbicide mobility. HortScience. 36(5):p. 849. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=77093 |
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| DOI: 10.21273/HORTSCI.36.5.837 |
| Web URL(s):
https://journals.ashs.org/hortsci/view/journals/hortsci/36/5/article-p837.xml
Last checked: 11/15/2019
Requires: PDF Reader
Notes: Item is within a single large file; Abstract only |
| 
MSU catalog number: SB 1 .H64 |
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X - Filed under R=77093 |
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