Nitrogen balance in a stockless organic cropping system with different strategies for internal N cycling via residual biomass

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Råberg, ToraSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Biosystem och teknologi,Department of Biosystems and Technology,SLU, Sweden (författare)

Nitrogen balance in a stockless organic cropping system with different strategies for internal N cycling via residual biomass

Artikel/kapitelEngelska2018

Förlag, utgivningsår, omfång ...

2018-07-31
Springer Netherlands,2018
printrdacarrier

Nummerbeteckningar

LIBRIS-ID:oai:DiVA.org:ri-56662
https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-56662URI
https://doi.org/10.1007/s10705-018-9935-5DOI
https://res.slu.se/id/publ/96984URI

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Språk:engelska
Sammanfattning på:engelska

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Ämneskategori:ref swepub-contenttype
Ämneskategori:art swepub-publicationtype

Anmärkningar

Funding details: Svenska Forskningsrådet Formas, 2010-7733-18410-52; Funding details: Lunds Universitet; Funding details: Sveriges Lantbruksuniversitet, SLU; Funding text 1: We acknowledge the Swedish Research Council Formas and the Swedish University of Agricultural Sciences for funding of the research. This field study was carried out within the Swedish Infrastructure for Ecosystem Science (SITES) L?nnstorp Research Station in Alnarp. We thank Ph.D. Emma Kreuger, Lund University, the research station technical manager Erik Rasmusson, field assistant Lina Hirsch and university lecturer Sven-Erik Svensson for technical support.; Funding text 2: Funding Funding was provided by Swedish Research Council FORMAS (Grant No. 2010-7733-18410-52).; Funding text 3: Acknowledgements We acknowledge the Swedish Research Council Formas and the Swedish University of Agricultural Sciences for funding of the research. This field study was carried out within the Swedish Infrastructure for Ecosystem Science (SITES) Lönnstorp Research Station in Alnarp. We thank Ph.D.
A major future challenge in agriculture is to reduce the use of new reactive nitrogen (N) while maintaining or increasing productivity without causing a negative N balance in cropping systems. We investigated if strategic management of internal biomass N resources (green manure ley, crop residues and cover crops) within an organic crop rotation of six main crops, could maintain the N balance. Two years of measurements in the field experiment in southern Sweden were used to compare three biomass management strategies: anaerobic digestion of ensiled biomass and application of the digestate to the non-legume crops (AD), biomass redistribution as silage to non-legume crops (BR), and leaving the biomass in situ (IS). Neither aboveground crop N content from soil, nor the proportion of N derived from N2 fixation in legumes were influenced by biomass management treatment. On the other hand, the allocation of N-rich silage and digestate to non-legume crops resulted in higher N2 fixation in AD and BR (57 and 58 kg ha−1 year−1), compared to IS (33 kg ha−1 year−1) in the second study year. The N balance ranged between − 9.9 and 24 kg N ha−1, with more positive budgets in AD and BR than in IS. The storage of biomass for reallocation in spring led to an increasing accumulation of N in the BR and AD systems from one year to another. These strategies also provide an opportunity to supply the crop with the N when most needed, thereby potentially decreasing the risk of N losses during winter. © 2018, The Author(s).

Ämnesord och genrebeteckningar

LANTBRUKSVETENSKAPER Lantbruksvetenskap, skogsbruk och fiske Jordbruksvetenskap hsv//swe
AGRICULTURAL SCIENCES Agriculture, Forestry and Fisheries Agricultural Science hsv//eng
LANTBRUKSVETENSKAPER Lantbruksvetenskap, skogsbruk och fiske Markvetenskap hsv//swe
AGRICULTURAL SCIENCES Agriculture, Forestry and Fisheries Soil Science hsv//eng
Anaerobic digestion
Arable and horticultural crops
N balance
N2 fixation
Soil and residue N
Strategic biomass N management
agricultural management
biomass
crop plant
crop production
crop rotation
cropping practice
nitrogen
nitrogen fixation
organic farming
seasonal variation
soil nitrogen
strategic approach
Sweden

Biuppslag (personer, institutioner, konferenser, titlar ...)

Carlsson, GeorgSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Biosystem och teknologi,Department of Biosystems and Technology(Swepub:slu)48872 (författare)
Jensen, Erik SteenSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Biosystem och teknologi,Department of Biosystems and Technology(Swepub:slu)50246 (författare)
Sveriges lantbruksuniversitetBiosystem och teknologi (creator_code:org_t)
Sveriges lantbruksuniversitet

Sammanhörande titlar

Ingår i:Nutrient Cycling in Agroecosystems: Springer Netherlands112:2, s. 165-1781385-13141573-0867

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