N-losses and energy use in a scenario for conversion to organic farming.
Identifieur interne : 000074 ( Ncbi/Merge ); précédent : 000073; suivant : 000075N-losses and energy use in a scenario for conversion to organic farming.
Auteurs : T. Dalgaard [Danemark] ; C. Kjeldsen ; N J Hutchings ; J F HansenSource :
- TheScientificWorldJournal [ 1537-744X ] ; 2001.
English descriptors
- KwdEn :
- Agriculture (methods), Agriculture (statistics & numerical data), Animal Feed (statistics & numerical data), Animal Feed (utilization), Animals, Animals, Domestic (growth & development), Animals, Domestic (metabolism), Cattle, Conservation of Natural Resources (statistics & numerical data), Electric Power Supplies (utilization), Electricity, Environmental Monitoring (methods), Fertilizers (utilization), Fossil Fuels (utilization), Humans, Nitrogen (metabolism), Poultry (growth & development), Poultry (metabolism), Water Supply (statistics & numerical data).
- MESH :
- chemical , metabolism : Nitrogen.
- chemical , utilization : Fertilizers, Fossil Fuels.
- growth & development : Animals, Domestic, Poultry.
- metabolism : Animals, Domestic, Poultry.
- methods : Agriculture, Environmental Monitoring.
- statistics & numerical data : Agriculture, Animal Feed, Conservation of Natural Resources, Water Supply.
- utilization : Animal Feed, Electric Power Supplies.
- Animals, Cattle, Electricity, Humans.
Abstract
The aims of organic farming include the recycling of nutrients and organic matter and the minimisation of the environmental impact of agriculture. Reduced nitrogen (N)-losses and energy (E)-use are therefore fundamental objectives of conversion to organic farming. However, the case is not straightforward, and different scenarios for conversion to organic farming might lead to reduced or increased N-losses and E-use. This paper presents a scenario tool that uses a Geographical Information System in association with models for crop rotations, fertilisation practices, N-losses, and E-uses. The scenario tool has been developed within the multidisciplinary research project Land Use and Landscape Development Illustrated with Scenarios (ARLAS). A pilot scenario was carried out, where predicted changes in N-losses and E-uses following conversion to organic farming in areas with special interests in clean groundwater were compared. The N-surplus and E-use were on average reduced by 10 and 54%, respectively. However, these reductions following the predicted changes in crop rotations, livestock densities, and fertilisation practices were not large enough to ensure a statistically significant reduction at the 95% level. We therefore recommend further research in how conversion to organic farming or other changes in the agricultural practice might help to reduce N-surpluses and E-uses. In that context, the presented scenario tool would be useful.
DOI: 10.1100/tsw.2001.305
PubMed: 12805832
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Reduced nitrogen (N)-losses and energy (E)-use are therefore fundamental objectives of conversion to organic farming. However, the case is not straightforward, and different scenarios for conversion to organic farming might lead to reduced or increased N-losses and E-use. This paper presents a scenario tool that uses a Geographical Information System in association with models for crop rotations, fertilisation practices, N-losses, and E-uses. The scenario tool has been developed within the multidisciplinary research project Land Use and Landscape Development Illustrated with Scenarios (ARLAS). A pilot scenario was carried out, where predicted changes in N-losses and E-uses following conversion to organic farming in areas with special interests in clean groundwater were compared. The N-surplus and E-use were on average reduced by 10 and 54%, respectively. However, these reductions following the predicted changes in crop rotations, livestock densities, and fertilisation practices were not large enough to ensure a statistically significant reduction at the 95% level. We therefore recommend further research in how conversion to organic farming or other changes in the agricultural practice might help to reduce N-surpluses and E-uses. In that context, the presented scenario tool would be useful.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">12805832</PMID><DateCreated><Year>2003</Year><Month>06</Month><Day>13</Day></DateCreated><DateCompleted><Year>2004</Year><Month>04</Month><Day>15</Day></DateCompleted><DateRevised><Year>2013</Year><Month>11</Month><Day>21</Day></DateRevised><Article PubModel="Electronic"><Journal><ISSN IssnType="Electronic">1537-744X</ISSN><JournalIssue CitedMedium="Internet"><Volume>1 Suppl 2</Volume><PubDate><Year>2001</Year><Month>Nov</Month><Day>16</Day></PubDate></JournalIssue><Title>TheScientificWorldJournal</Title><ISOAbbreviation>ScientificWorldJournal</ISOAbbreviation></Journal><ArticleTitle>N-losses and energy use in a scenario for conversion to organic farming.</ArticleTitle><Pagination><MedlinePgn>822-9</MedlinePgn></Pagination><Abstract><AbstractText>The aims of organic farming include the recycling of nutrients and organic matter and the minimisation of the environmental impact of agriculture. Reduced nitrogen (N)-losses and energy (E)-use are therefore fundamental objectives of conversion to organic farming. However, the case is not straightforward, and different scenarios for conversion to organic farming might lead to reduced or increased N-losses and E-use. This paper presents a scenario tool that uses a Geographical Information System in association with models for crop rotations, fertilisation practices, N-losses, and E-uses. The scenario tool has been developed within the multidisciplinary research project Land Use and Landscape Development Illustrated with Scenarios (ARLAS). A pilot scenario was carried out, where predicted changes in N-losses and E-uses following conversion to organic farming in areas with special interests in clean groundwater were compared. The N-surplus and E-use were on average reduced by 10 and 54%, respectively. However, these reductions following the predicted changes in crop rotations, livestock densities, and fertilisation practices were not large enough to ensure a statistically significant reduction at the 95% level. We therefore recommend further research in how conversion to organic farming or other changes in the agricultural practice might help to reduce N-surpluses and E-uses. 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Kjeldsen</name></noCountry><country name="Danemark"><noRegion><name sortKey="Dalgaard, T" sort="Dalgaard, T" uniqKey="Dalgaard T" first="T" last="Dalgaard">T. Dalgaard</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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