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Do alternative irri...
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Livsey, JohnStockholms universitet,Institutionen för naturgeografi
(författare)
Do alternative irrigation strategies for rice cultivation decrease water footprints at the cost of long-term soil health?
- Artikel/kapitelEngelska2019
Förlag, utgivningsår, omfång ...
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2019-07-05
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IOP Publishing,2019
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printrdacarrier
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LIBRIS-ID:oai:DiVA.org:su-170786
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-170786URI
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https://doi.org/10.1088/1748-9326/ab2108DOI
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https://res.slu.se/id/publ/101051URI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:art swepub-publicationtype
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The availability of water is a growing concern for flooded rice production. As such, several water-saving irrigation practices have been developed to reduce water requirements. Alternate wetting and drying and mid-season drainage have been shown to potentially reduce water requirements while maintaining rice yields when compared to continuous flooding. With the removal of permanently anaerobic conditions during the growing season, water-saving irrigation can also reduce CO2 equivalent (CO2eq) emissions, helping reduce the impact of greenhouse gas (GHG) emissions. However, the long-term impact of water-saving irrigation on soil organic carbon (SOC)-used here as an indicator of soil health and fertility-has not been explored. We therefore conducted a meta-analysis to assess the effects of common water-saving irrigation practices (alternate wetting and drying and mid-season drainage) on (i) SOC, and (ii) GHG emissions. Despite an extensive literature search, only 12 studies were found containing data to constrain the soil C balance in both continuous flooding and water-saving irrigation plots, highlighting the still limited understanding of long-term impacts of water-saving irrigation on soil health and GHG emissions. Water-saving irrigation was found to reduce emissions of CH4 by 52.3% and increased those of CO2 by 44.8%. CO2eq emissions were thereby reduced by 18.6% but the soil-to-atmosphere carbon (C) flux increased by 25% when compared to continuous flooding. Water-saving irrigation was also found to have a negative effect on both SOC-reducing concentrations by 5.2%-and soil organic nitrogen-potentially depleting stocks by more than 100 kgN/ha per year. While negative effects of water-saving irrigation on rice yield may not be visible in short-term experiments, care should be taken when assessing the long-term sustainability of these irrigation practices because they can decrease soil fertility. Strategies need to be developed for assessing the more long-term effects of these irrigation practices by considering trade-offs between water savings and other ecosystem services.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Kätterer, ThomasSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment(Swepub:slu)48437
(författare)
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Vico, GiuliaSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för växtproduktionsekologi,Department of Crop Production Ecology(Swepub:slu)49159
(författare)
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Lyon, Steve W.Stockholms universitet,Institutionen för naturgeografi,The Nature Conservancy, USA.(Swepub:su)stlyo
(författare)
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Lindborg, ReginaStockholms universitet,Institutionen för naturgeografi(Swepub:su)rlind
(författare)
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Scaini, AnnaStockholms universitet,Institutionen för naturgeografi(Swepub:su)ansc5516
(författare)
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Da, Chau Thi
(författare)
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Manzoni, StefanoStockholms universitet,Institutionen för naturgeografi,Stockholm University(Swepub:slu)98008
(författare)
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Stockholms universitetInstitutionen för naturgeografi
(creator_code:org_t)
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Sveriges lantbruksuniversitet
Sammanhörande titlar
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Ingår i:Environmental Research Letters: IOP Publishing14:71748-9326
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