Spatial distribution of hexazinone and metabolites in a luvisolic soil
作者:
JosephC. Feng,
SurindarS. Sidhu,
CeciliaC. Feng,
期刊:
Journal of Environmental Science and Health, Part B
(Taylor Available online 1992)
卷期:
Volume 27,
issue 6
页码: 639-654
ISSN:0360-1234
年代: 1992
DOI:10.1080/03601239209372804
出版商: Taylor & Francis Group
关键词: Hexazinone;PRONONE 10G;Metabolites;Forest Soils
数据来源: Taylor
摘要:
The spatial distribution of hexazinone and two primary metabolites were measured in forest soil for two years following the aerial application of a granular formulation, PRONONE 10G, in northern Alberta. Residues were quantified using solid‐phase extraction and capillary gas chromatography. Initial deposition rates of two hexazinone treatments averaged 2.3 ± 0.5 and 4.1 ± 0.8 kg/ha for each triplicated plots. One year after application, residues of hexazinone averaged 0.25 ± 0.09 and 0.40 ± 0.02 kg/ha in 2.3 and 4.1 kg/ha treatment, respectively, in the 0–10 cm surface soil; and were distributed vertically in soil depths of 0–10, 10–20, and 20–30 cm at ratios of 10:11:2 and 10:5:2, respectively, in 2.3 and 4.1 kg/ha treatment. Metabolites A and B amounted to 15 and 30% of hexazinone, respectively. Two years after application, the vertical movement of hexazinone in soil was quantifiable to the 40‐cm depth in both 2.3‐ and 4.1‐kg/ha treatment plots. Trace amounts of hexazinone were detected at 130 cm only in the 2.3‐kg/ha plot, which is likely due to the more freely downward movement of hexazinone to deeper horizons along decayed root channels.
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