Interaction between BSM-contaminated soils and Italian ryegrass

Li, Huashou and Li, Na and Lin, Chuxia and He, Hongzhi and Chen, Guikui (2012) Interaction between BSM-contaminated soils and Italian ryegrass. Journal of Environmental Science and Health Part B: Pesticides, Food Contaminants, and Agricultural Wastes, 47 (5). pp. 427-433. ISSN 0360-1234

Abstract

The interaction among the bensulfuron-methyl, growth of Italian ryegrass, and soil chemical/biochemical/microbiological parameters was investigated in a microcosm experiment. The bensulfuron-methyl added to the soil can be rapidly degraded by certain fungi and actinomycetes present in the original paddy rice soil. The growth of Italian ryegrass significantly accelerated the in-soil degradation of bensulfuron-methyl in its rhizosphere. The uptake of bensulfuron-methyl by ryegrass increased with increasing dosage level of bensulfuron-methyl. However, the phytoextraction of bensulfuron-methyl by ryegrass contributed insignificantly to the total removal of the soil bensulfuron-methyl.Within the dosage range set in this study, the root development of ryegrass was not adversely affected by the presence of the soil bensulfuron-methyl although the fresh biomass of shoot was slightly reduced in the higher dosage treatments. This can be attributed to the adsorption of the added bensulfuron-methyl by soil colloids and consequently the reduction of bensulfuron-methyl level in the soil pore water to a concentration sufficiently lower than the toxic level. The growth of ryegrass significantly increased soil pH and the activities of phosphatase and peroxidase but reduced the EC and the activities of urease in the rhizospheric soil.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to published version, due to publisher's copyright policy (Taylor & Francis).
Depositing User: Dr Chuxia Lin
Faculty / Department / School: Current - USQ Other
Date Deposited: 25 Jul 2012 09:59
Last Modified: 03 Jul 2013 01:08
Uncontrolled Keywords: bensulfuron-methyl; Italian ryegrass; soil; paddy rice; degradation; rhizosphere
Fields of Research (FOR2008): 10 Technology > 1002 Environmental Biotechnology > 100203 Bioremediation
05 Environmental Sciences > 0503 Soil Sciences > 050304 Soil Chemistry (excl. Carbon Sequestration Science)
05 Environmental Sciences > 0502 Environmental Science and Management > 050299 Environmental Science and Management not elsewhere classified
Socio-Economic Objective (SEO2008): D Environment > 96 Environment > 9614 Soils > 961402 Farmland, Arable Cropland and Permanent Cropland Soils
Identification Number or DOI: doi: 10.1080/03601234.2012.657060
URI: http://eprints.usq.edu.au/id/eprint/21071

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