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Wie ist es um die Bodenfruchtbarkeit im Ökolandbau bestellt: Nährstoffversorgung und Humusstatus? Organic Eprints
Kolbe, Hartmut.
In diesem Beitrag ist eine Auswertung von vielen Erhebungen und Studien aus den letzten 10 – 15 Jahren über die Situation der ökologischen landwirtschaftlichen Betriebe auf dem Gebiet der Nährstoff- und Humusversorgung durchgeführt worden. Es liegen Auswertungen von insgesamt 23 Studien mit Daten aus 360 Öko-Betrieben und/oder ca. 7460 Acker- und Grünlandschlägen vor. Der Umfang an Daten erlaubt erstmals für nachfolgend genannte Merkmale der Bodenfruchtbarkeit eine verhältnismäßig genaue Beschreibung der Situation in vielen Regionen und Bundesländern und im Durchschnitt von Deutschland: Humus, Stickstoff, Schwefel, Phosphor, Kalium, Magnesium, pH-Wert und Kalkversorgung. Die Nährstoffbilanzen und Bodengehalte der Acker- und Grünlandschläge weisen oft...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop combinations and interactions Composting and manuring Recycling; Balancing and resource management Nutrient turnover Farm nutrient management Quality and evaluation of inputs.
Ano: 2015 URL: http://orgprints.org/29539/1/Bodenfruchtbarkeit_%C3%96ko_BAD-VLK15.pdf
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Strip cropping of alternating perennial grass-clover and annual rye - vetch intercrops when grown within an organic farming system Organic Eprints
Hauggaard-Nielsen, Henrik; Johansen , Anders; Carter, Mette S.; Ambus, Per; Jensen, Erik Steen.
A field experiment was carried out including alternating perennial ryegrass (Lolium perenne L.) – clover (Trifolium repens + Trifolium pretense L.) pasture mix with annual vetch (Vicia villosa L.) – winter rye (Secale cereale L.) intercrops. The annuals were established after soil incorporation of a 1st-year grass-clover in a 6-m wide strip, whereas the perennials were established without incorporating the 1st-year grass-clover in an equivalent 6-m wide strip. This resulted in an early interspecific competitive advantage for the perennial strip and especially limiting growth of the rye component. Relative clover proportion in the sward increased with increasing distance to the annual strip indicating more available soil mineral N in the interface between...
Tipo: Journal paper Palavras-chave: Crop combinations and interactions Composting and manuring Recycling; Balancing and resource management Crop husbandry Farm nutrient management.
Ano: 2012 URL: http://orgprints.org/20913/7/20913.pdf
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Effects of strip intercropping concept with perennial diversified grass-clover strip and annual winter rye-winter vetch intercrop as energy crops Organic Eprints
Hauggaard-Nielsen, Henrik; Johansen , Anders; Carter, Mette S.; Ambus, Per; Jensen, Erik Steen.
The combination of perennials and annuals in a strip cropping system is challenging primarily because the interspecific competitive ability of the perennials towards the annuals seems to be too dominating. Especially at the first harvest (tillering) closest to the adjacent grass-clover strip severe total dry matter production reductions was found ranging from 25%, 5% and 20% in the vetch SC, rye SC and vetch-rye IC, respectively. Rye in particular was suffering from the grass-clover interspecific competition with a SC yield of 700 g DM m-2 (0-25 cm) at maturity as compared to 1025 g DM m-2 when grown > 150 cm away. When grown >150 cm away from the grass-clover strip rye accumulate 8 g soil mineral N m-2,which is in the range of the expected according...
Tipo: Journal paper Palavras-chave: Crop combinations and interactions Composting and manuring Recycling; Balancing and resource management Crop husbandry Farm nutrient management.
Ano: 2011 URL: http://orgprints.org/18946/4/18946.pdf
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