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| Fricke, Thomas; Wachendorf, Michael. |
| To describe spatial heterogeneity of crop properties, non-destructive methods can be helpful in capturing whole field data sets. This paper shows examples of different sensor methods that have been evaluated to measure biomass and legume content in legume-grass mixtures. Biomass has been estimated using vegetation indices (NDVI, SR, EVI and REIP) calculated from spectral reflectance measurements in greenhouse experiments. The index REIP has been used to identify species composition as well. Furthermore, biomass values can be derived from ultra sonic measurements of sward heights. To quantify legume contents in short term leys, which is important for forage quality and nitrogen flows, image analysis tools have been used in different experi-ments with good... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Pasture and forage crops Cereals; Pulses and oilseeds Crop combinations and interactions. |
| Ano: 2007 |
URL: http://orgprints.org/9537/1/9537_Fricke_Poster.pdf |
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| Godt, Jochen; van Elsen, Thomas; Haase, Thorsten; Braukmann, Ulrich; Fricke, Thomas; Saucke, Helmut; Hensel, Oliver; Baierl, Cindy; Walter, Karl-Henning; Schumann, C.; Heß, Jürgen. |
| The Hessian state domain Frankenhausen near Kassel was converted to organic farming in July 1998 and serves as a research and demonstration farm of the univer-sity. Before that time the farm changed constantly by typical intensification of conven-tional farming: The landscape is a mirror of intense use: cleared and drained fields, canalised brooks and large fields with few structural elements. – Within the project “The Integration of Nature Conservation into Organic Farming” (supported by the German Federal Agency for Nature Conservation with funds from the Federal Envi-ronmental Ministry) and based on the analysis of the present situation using methods of landscape ecology. Measures to restore brooks, structural elements and biotopes are to be... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Systems research and participatory research; Landscape and recreation; Biodiversity and ecosystem services. |
| Ano: 2007 |
URL: http://orgprints.org/9559/1/9559_Godt_Poster.pdf |
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| Spatz, Günter; Fricke, Thomas; Gottardi, Sara. |
| Um Hinweise für eine verbesserte Standortanpassung und damit effizientere Gestaltung von Grünlandansaaten zu erreichen, wurde eine 20 ha große Grünlandfläche mit sehr heterogenen Standorteigenschaften 5 Jahre nach Ansaat untersucht. Im Jahr 2003 erfolgte die Erhebung des Arteninventars und zahlreicher Standortfaktoren an 300 Messpunkten. Zusammen mit bereits vorliegenden Daten erfolgte eine statistische und räumliche Analyse, inwieweit das Vorkommen der angesäten Arten mit der Ausprägung bestimmter Lebensbedingungen in Beziehung steht. Kontinuierliche Beziehungen zwischen einzelnen oder mehreren Standortfaktoren und der Zusammensetzung der Grünlandvegetation bzw. des Auftretens einzelner Arten konnten nicht oder in nur sehr schwacher Form ermittelt... |
| Tipo: Report |
Palavras-chave: Pasture and forage crops. |
| Ano: 2003 |
URL: http://orgprints.org/4757/1/4757%2D02OE442%2Dspatz%2Dg%2Det%2Dal%2Duni%2Dkassel%2D2003%2Dgruenlandansaat.pdf |
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| Fricke, Thomas; Heß, Jürgen. |
| Im Zeichen der vom Bundesministerium für Verbraucherschutz, Ernährung und Landwirtschaft eingeleiteten Agrarwende wird der Ökologische Landbau einen verstärkten Aufschwung erfahren. Auch die bisherige Entwicklung war durch eine positive Tendenz mit zweistelliger Zuwachsrate gekennzeichnet (BMVEL, 2001). Ende 2000 wurden in Deutschland 546.027 ha landwirtschaftlich genutzte Fläche, entsprechend 3,2 % der LN, von 12.732 Betrieben nach den EU-weiten Regelungen des Ökologischen Landbaus bewirtschaftet (ZMP, 2002). Eine Tendenz zu größeren Betrieben im Zuge des Strukturwandels und der Agrarwende ist zu erwarten. Der Hintergrund einer teilflächenspezifischen Bewirtschaftung (Precision Farming) im Sinne einer... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop husbandry; Soil. |
| Ano: 2002 |
URL: http://orgprints.org/1158/1/10_0_ZWIBLA_und%2010.1.pdf |
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| Gottardi, Sara; Fricke, Thomas. |
| The relationship between white clover (Trifolium repens), site conditions, species composition and forage quality has been analysed by conducting a factor analysis (incl. varimax rotation) based on data sets sampled along a 50 m grid on a 20 ha permanent grassland site in Central Germany with heterogeneous site conditions, sown in 1998. Three factors which are related to the appearance of white clover has been interpreted, showing a positive relationship of white clover to (A) Lolium perenne on heavy and productive soils, (B) Poa pratensis and Festuca rubra on heavy and stony soils at slopes and ridges and (C) Lolium perenne and weeds on wet soils along the field border, often characterised by sward damage. The white clover factor loadings sometimes are... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Pasture and forage crops. |
| Ano: 2005 |
URL: http://orgprints.org/3807/1/3807.pdf |
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| Himstedt, Maike; Fricke, Thomas; Wachendorf, Michael. |
| A pot experiment in a greenhouse was conducted to follow the question how to esti-mate dominance of legumes in legume/grass swards by image analysis. Pure swards and binary legume/grass mixtures of red clover, white clover, lucerne and perennial ryegrass were sown in two week intervals and harvested together 35, 49 or 63 days after sowing to have different old swards. Digital photos of all variants were taken one day before harvesting. Sward composition was detected by fractionating biomass in grass, legumes and unsown species as reference. Eight images of the oldest swards were selected for determining an optimal image analysis procedure with Optimas®. This image analysis procedure was used for all variants of all ages. The estimated dominances of... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions. |
| Ano: 2007 |
URL: http://orgprints.org/9565/1/9565_Himstedt_Poster.pdf |
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| van Elsen, Thomas; Godt, Jochen; Haase, Thorsten; Fricke, Thomas; Wachendorf, Michael; Saucke, Helmut; Möller, Detlev; Quintern, Michael; Otto, Marius; Kölsch, Eberhard; Baars, Ton; Heß, Jürgen. |
| On the Hessian state domain Frankenhausen near Kassel the project “The Integration of Nature Conservation into Organic Farming” (supported by the German Federal Agency for Nature Conservation with funds of the Federal Environmental Ministry) aims to support biodiversity not only by restoring biotopes on the farmland. The focus lies on measures to enhance the diversity on the arable land and the pastures of the farm. A participatory approach is striven for, in which the scientists and planners take the role of a companion catalyst or moderator. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Systems research and participatory research; Landscape and recreation; Biodiversity and ecosystem services. |
| Ano: 2007 |
URL: http://orgprints.org/9556/1/9556_vanElsen_Poster.pdf |
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