{
  "eprintid": "3567",
  "rev_number": "1",
  "eprint_status": "archive",
  "userid": "1288",
  "dir": "disk0/00/00/35/67",
  "datestamp": "2005-03-05",
  "lastmod": "2009-08-20 14:24:10",
  "status_changed": "2009-08-20 14:24:10",
  "type": "conference_item",
  "metadata_visibility": "show",
  "item_issues_count": "0",
  "doclang": "de",
  "projects": [
    "wissenschaftstagung-2005",
    "de-uni-goettingen-pflanzenbau"
  ],
  "confdates": "01.03.2005 - 04.03.2005",
  "conference": "8. Wissenschaftstagung Ökologischer Landbau - Ende der Nische",
  "confloc": "Kassel",
  "refereed": "yes",
  "budget": "0",
  "addtitle": "Nitrogen fixation and nitrogen balance in lucerne, red clover and Persian clover",
  "publicfulltext": "TRUE",
  "presentationtype": "paper",
  "creators": [
    {
      "name": {
        "family": "Jung",
        "given": "Rüdiger"
      },
      "id": ""
    },
    {
      "name": {
        "family": "Schmidtke",
        "given": "Knut"
      },
      "id": ""
    },
    {
      "name": {
        "family": "Rauber",
        "given": "Rolf"
      },
      "id": ""
    }
  ],
  "title": "N2-Fixierleistung und N-Flächenbilanzsaldo beim Anbau von Luzerne, Rotklee und Persischem Klee",
  "ispublished": "pub",
  "subjects": [
    "3cereals"
  ],
  "keywords": "Pflanzenernährung, Pflanzenbau, Stickstoff",
  "abstract": "Atmospheric N2 fixation by lucerne (Medicago sativa), red clover (Trifolium pratense) and Persian clover (Trifolium resupinatum) were determined in a field study carried out from 1999 to 2000 at three different sites in Lower Saxony, Germany. Simplified nitrogen balance (nitrogen fixed symbiotically in shoots, stubble and roots minus the nitrogen in herbage yield) was calculated using nitrogen data from field studies. Three varieties each of lucerne and red clover, as well as two varieties of Persian clover, were cultivated in pure stands. The forage yield was removed from field plots after each cutting (three or four cuttings per year). The level of symbiotically fixed nitrogen (determined with natural 15N abundance method) which was accumulated in the shoots and roots of lucerne ranged from 20 to 455 kg ha 1 a 1. Nitrogen fixed by red clover varied between 149 and 442 kg ha 1 a 1. Persian clover as an annual crop accumulated between 42 and 177 kg N ha 1 a 1 from the atmosphere. Calculated nitrogen balances ranged from 69 kg N ha 1 a 1 (Persian clover) to +43 kg N ha 1 a 1 (Lucerne). A close correlation was found between the annual herbage dry matter yield and the accumulated nitrogen in the shoots and roots. Our data could be used for calculating tables which represent the expected simplified nitrogen balances in cultivated forage legumes.",
  "date": "2005",
  "date_type": "published",
  "publication": "Ende der Nische, Beiträge zur 8. Wissenschaftstagung Ökologischer Landbau",
  "publisher": "kassel university press GmbH, Kassel",
  "editors": [
    {
      "name": {
        "family": "Heß",
        "given": "J"
      },
      "id": ""
    },
    {
      "name": {
        "family": "Rahmann",
        "given": "G"
      },
      "id": ""
    }
  ],
  "referencetext": "Boller B C, Nösberger J (1994) Differences in nitrogen fixation among field-grown red clover strains at different levels of 15N fertilization. Euphytica 78: 167-174 Carlsson G, Huss-Danell K (2003) Nitrogen fixation in perennial legumes in the field. Plant and Soil 253: 353–372 Høgh-Jensen H, Schjørring J K (2001) Rhizodeposition of nitrogen by red clover, white clover and ryegrass leys, Soil Biol. Biochem. 33: 439-448 Jung R (2003) Stickstoff-Fixierleistung von Luzerne (Medicago sativa L.), Rotklee (Trifolium pratense L.) und Persischem Klee (Trifolium resupinatum L.) in Reinsaat und Gemenge mit Poaceen - Experimentelle Grundlagen und Kalkulationsverfahren zur Ermittlung der Stickstoff-Flächenbilanz, Dissertation Universität Göttingen: 1-350 http://webdoc.sub.gwdg.de/diss/2003/jung_ruediger Mayer J, Buegger F, Jensen E S, Schloter M, Heß J (2003) Estimating N rhizodeposi-tion of grain legumes using a 15N in situ stem labelling method. Soil Biol. Biochem. 35: 21-28. McAuliffe C, Chamblee D S, Uribe-Arango H, Woodhouse W W, (1958) Influence of inorganic nitrogen on nitrogen fixation by legumes as revealed by 15N. Agron. J. 50: 334-337. Reiter K, Schmidtke K, Rauber R (2002): The influence of long-term tillage systems on symbiotic N2 fixation of pea (Pisum sativum L.) and red clover (Trifolium pratense L.). Plant and Soil 238: 41-55 Schmidtke K (1996) Methodik zur Ermittlung der N-Flächenbilanz beim Anbau von Leguminosen. Mitt. Ges. Pflanzenbauwiss. 9: 43-44 Schmidtke K (1999) N-Flächenbilanz beim Anbau von Futter- und Körnerleguminosen. In: Hoffmann H, Müller S (Hrsg.) Beiträge 5. Wissenschaftstagung zum Ökologischen Landbau, Berlin: 234-238 Schmidtke K (2001) Umweltgerechter Anbau von Leguminosen – Entwicklung und Anwendung eines Verfahrens zur Quantifizierung der N-Flächenbilanz (Az. 07312). Abschlußbericht des Forschungsvorhabens, gefördert von der Deutschen Bundesstif-tung Umwelt, Osnabrück (Dezember 2001): 1-234 Shearer G, Kohl, D H (1986) N2 fixation in field settings: estimation based on natural 15N abundance. Aust. J. Plant Physiol. 13: 699-756.",
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