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| Kautz, Dr. Timo; Köpke, Prof. Dr. Ulrich. |
| The aim of this study was to gain experience in the organic cultivation of artichokes (Cynara scolymus L.) under the condition of the temperate climate of the Lower Rhine Bay. The effects of reducing the number of buds by removing bastard branches on the yield of two cultivars were tested in a field experiment. Cultivar ‘Imperial Star’ yielded up to 10.31 t FM / ha, for cultivar ‘JW 109’ the yield was up to 7.63 t FM / ha. In both cultivars, removing bastard branches resulted in higher bud weight, whereas total yield per ha was reduced. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Vegetables. |
| Ano: 2009 |
URL: http://orgprints.org/14216/1/Kautz_14216.pdf |
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| P. Massucati, Dipl.-Ing.agr. Luiz F.; Windisch, Evi; Täufer, Frank; Köpke, Prof. Dr. Ulrich. |
| Citronella is an oil, extracted from lemon grass species (Cymbopogon sp) and has been identified as a potential burn-down bioherbicide. In greenhouse pot experiments two fractions of dock roots, Rumex obtusifolius and Rumex crispus (light root fraction, LW: 5-12 g root weight and heavy root fraction, HW: 15-30 g weight) were planted. 116 days after planting the mass of the untreated control gave an increase of 600% (LW) and 300% (HW) root mass, respectively. Citronella oil hindered the accumulation of assimilates in the roots showing a slight decrease of the initial root mass. Efficacy of citronella oil was higher as with cutting the leaves. Citronella oil also showed its efficacy to decrease the leaf area of dock plants after application of lower... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management. |
| Ano: 2009 |
URL: http://orgprints.org/14424/1/Massucati_14424.pdf |
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| Stumm, Christoph; Berg, Dr. Martin; Köpke, Prof. Dr. Ulrich. |
| At the experimental farm Wiesengut in Hennef (Germany) in 2007/8 four different cultivation methods of rapeseed and an application of fertiliser in springtime were tested in order to manage weeds, to reduce nitrogen losses during wintertime and to enhance grain yield. Cultivation methods tested included i. narrow row distance (12 cm), no mechanical weed control; ii. wide row distance (24 cm), mechanical hoeing; iii. rapeseed sown in double rows intercropped with buckwheat (Fagopyrum esculentum Moench) sown in double rows, row distance 12 cm, no mechanical weed control; iv. rapeseed sown in double rows and left double rows free, row distance 12 cm, mechanical hoeing. In a two factorial completely randomised block design these treatments were... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds Crop combinations and interactions Weed management Composting and manuring. |
| Ano: 2009 |
URL: http://orgprints.org/14338/1/Stumm_14338.pdf |
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| Kießling, Daniela; Köpke, Prof. Dr. Ulrich. |
| Intercrops are considered as less susceptible to pests and diseases and may inhibit weeds more efficiently resulting in enhanced yields and profitability. N2 fixation of legumes is an important nitrogen (N) input factor of Organic Farming systems and results in partly unused plant available soil N (PAN) in sole cropped faba beans. Simultaneously cultivated oilseeds may function as sinks for PAN and enhance biodiversity with all positive aspects. In this respect we investigated several oilseeds intercropped with faba beans at different row distances. Depending on row distance we analysed e.g. the use of soil nutrients and land equivalent ratio (LER). Intercropped oilseeds depleted PAN between FB rows significantly in early development. In 2007 yield... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions. |
| Ano: 2008 |
URL: http://orgprints.org/12014/1/Kiessling_12014_ed.doc |
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