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| Rattler, Sabine; Briviba, Karlis; Birzele, Barbara; Koepke, Ulrich. |
| The effect of different agronomic strategies on the nutritional quality of head lettuce was investigated. The factors included were irrigation type, fertiliser input type and level. The assessed ingredient parameters were nitrate, lutein, ß-carotene and polyphenols. Hygiene was described by total aerobic bacterial count and number of coliform bacteria, Escherichia coli, Salmonella enteritidis, Enterococcus and Enterobacteriaceae. Lettuce treated with mineral nitrogen fertiliser (calcium ammonium nitrate) displayed a higher nitrate content than lettuce treated with organic manures (fresh farmyard manure (FYM), rotten FYM (fermented nettle extract). Nitrate concentration in lettuce tended to increase with increasing amounts of fertiliser, independent of... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Vegetables. |
| Ano: 2005 |
URL: http://orgprints.org/4452/4/Rattler_etal_4p_revised%2Ded.doc |
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| Neuhoff, Daniel; Schulz, Dirk; Koepke, Ulrich. |
| Based on a comprehensive description of a recently published Decision Support System (WECOF-DSS) for weed management in organic winter wheat (http://www.wecof.uni-bonn.de), the potential of these tools for application in organic crop production is discussed. WECOF-DSS offers site-specific recommendations on cultivar choice, mechanical control, crop rotation and crop management for efficient weed control. Although Decision Support Systems are neither able to replace the decision maker nor to reflect all possible site conditions, the educational character of these tools is expected to result in an increasing use for specific objectives, e.g. high quality cereal production, also in Organic Agriculture. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds. |
| Ano: 2005 |
URL: http://orgprints.org/4222/3/Neuhoff_etal_4p_revised%2Ded.doc |
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| Leifert, Carlo; Koepke, Ulrich; Bonde, Marianne; Stanley, Richard; Hamm, Ulrich; Wyss, Gabriela; Benbrook, Chuck; Hajslova, Jana; Lueck, Lorna; Cooper, Julia. |
| In this workshop, we will summarize the results of the QLIF project on food safety issues. The participants discuss safety problems related to organic and low input standards and techniques for both animal and plant products. They will relate the findings to consumers’ perception and concern. Improved production and processing techniques will be suggested. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health. |
| Ano: 2008 |
URL: http://orgprints.org/13379/1/qlif%2Dworkshop2%2D4p%2Dleifert%2Detal%2D2008%2Dfoodsafety[1].doc |
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| Klein, Daniela; Kumar, Ramesh; Koepke, Ulrich. |
| Four old and endangered tomato cultivars were cultivated under greenhouse conditions with different levels of organic N-fertilisation and harvest at different maturity stages in order to develop a conclusive concept to preserve the diversity of old, endangered and multicolour cultivars. First results of several physio-chemical and sensory parameters were analysed to describe product quality. In order to assess consumer acceptance, 550 consumers were interviewed. The individual attributes of the cultivars, which differ in size, shape, colour, taste and health-related, beneficial physio-chemicals, are promoted by optimal harvest time. A combination of these cultivars distributed in regional markets is considered as a suitable concept for saving these... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Vegetables. |
| Ano: 2005 |
URL: http://orgprints.org/4395/1/4395%2DKlein_etal_4p_revised%2Ded.pdf |
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| Lukashyk, Pavel; Koepke, Ulrich. |
| Combinations of three different direct methods for controlling Vicia hirsuta (kainite application, flame weeding and harrowing) were investigated in field experiments. They were based on different strategies at early growth stages of V. hirsuta and standardised harrowing at late growth stages. The highest efficacy of kainite application and flame weeding was achieved at the one leaf stage of V. hirsuta. Winter wheat regeneration from damage caused by both kainite and thermal control was satisfactory when treatments were applied at early growth stages (GS 23). Vicia hirsuta plants that survived kainite application or flame weeding were successfully controlled by repeated harrowing at later crop growth stages; crop growth was not affected. Seed production of... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds. |
| Ano: 2005 |
URL: http://orgprints.org/4414/4/4414%2DLukashyk_Koepke_combination_4p_revised%2Ded.pdf |
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| Lukashyk, Pavel; Koepke, Ulrich. |
| Three strategies for controlling Cirsium arvense including (1) repeated stubble tillage with subsequent forage crop cultivation, (2) repeated mowing of a grass-clover ley, and (3) forage crop cultivation following a grass-clover ley ploughed in May/June (3) were investigated in field experiments over 3 years. The development of C. arvense shoot density was regularly assessed on sub-plots with defined thistle densities. In the medium-term (9 months), treatment 1 decreased shoot density and regrowth capacity of C. arvense more effectively than a mowed grass-clover ley (2). However, after 22 months, treatments 1 and 2 resulted in a similar strong reduction of C. arvense shoot density of 95 % and 97 %, respectively. At this time, the efficacy of treatment 3... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds. |
| Ano: 2005 |
URL: http://orgprints.org/4413/4/4413%2DLukashyk_Koepke_strategies_4p_revised%2Ded.pdf |
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