Was monochloramine responsible for widespread lettuce crop failures at a major recycled water irrigation scheme?

Barker, S.F., Faggian, R., Blackbeard, J., Hepworth, G. and Hamilton, A.J. 2013, Was monochloramine responsible for widespread lettuce crop failures at a major recycled water irrigation scheme?, Journal of water reuse and desalination, vol. 3, no. 2, pp. 148-159, doi: 10.2166/wrd.2013.019.

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Title Was monochloramine responsible for widespread lettuce crop failures at a major recycled water irrigation scheme?
Author(s) Barker, S.F.
Faggian, R.ORCID iD for Faggian, R. orcid.org/0000-0001-8750-3062
Blackbeard, J.
Hepworth, G.
Hamilton, A.J.
Journal name Journal of water reuse and desalination
Volume number 3
Issue number 2
Start page 148
End page 159
Total pages 12
Publisher IWA Publishing
Place of publication London, Eng.
Publication date 2013
ISSN 2220-1319
Keyword(s) Australia
disinfectant
Lactuca sativa
lettuce
recycled water
Werribee
Summary In 2008, vegetable growers observed stunted lettuce plants showing signs of chlorosis and wilting. It was suspected that monochloramine in the recycled water used for irrigation, in combination with extreme environmental conditions (high irrigation water salinity and extreme heat), was responsible for these crop failures. A series of glasshouse studies was conducted to evaluate the impact of monochloramine concentration alone on iceberg lettuce seedlings, as well as in combination with high salinity and hot ambient temperatures. Monochloramine concentrations up to 9 and 15 mg L−1 Cl2 for continuous and initial irrigation only, respectively, did not affect the weight of iceberg lettuce heads (p > 0.05), while the combination of monochloramine (4–5 mg L−1 Cl2) and salinity (3,500 μS cm−1) did not significantly affect harvest measurements (p > 0.05). We therefore conclude that it is unlikely that monochloramine was responsible for the observed crop failures.
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Language eng
DOI 10.2166/wrd.2013.019
Field of Research 049999 Earth Sciences not elsewhere classified
Socio Economic Objective 970104 Expanding Knowledge in the Earth Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30063567

Document type: Journal Article
Collection: Office of the Deputy Vice-Chancellor Research
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