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| Registros recuperados: 112 | |
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| Thorup-Kristensen, Kristian. |
| One of the main constraints of organic vegetable production is lack of available N, which causes reduced yields and quality of the to the crops. Therefore, we started an organic vegetable crop rotation in 1996 where we could study the possibilities for improved N utilisation. The N supply to the crops is based on the effects of nitrogen catch crops, green manure crops and crop sequences aimed at a high utilisation of precrop effects, whereas no input of any manures are made. Measurements and experiments have been made within the crop rotation to test the effectivenes of the N strategies used. The results show that it have been possible to maintain good yields of the crops in the rotation. Yields of leek and carrot have been as high as in conventional... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Production systems; Vegetables. |
| Ano: 2002 |
URL: http://orgprints.org/3874/1/3874.doc |
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| Dresbøll, Dorte Bodin; Thorup-Kristensen, Kristian. |
| Physical properties as well as process parameters were examined in three different composts based on plant residues. The wheat compost was a mixture of clover-grass and wheat straw in a ratio of 3:5, the Mischanthus compost was composed of the same materials and contained Mischanthus straw in addition in a ratio of 3:2.5:2, and the hemp compost was based on clover-grass, wheat and hemp straw also in a ratio of 3:2.5:2. The wheat and Mischanthus composts both had an initial C/N ratio of 26 and process parameters such as nitrogen losses and mineralisation pattern did not differ between the two compost types. The hemp compost had a much lower initial C/N ratio of 16 as the hemp straw was harvested fresh, resulting in higher losses and more mineralised... |
| Tipo: Journal paper |
Palavras-chave: Ornamentals; Flower bulbs and tree nurseries Composting and manuring. |
| Ano: 2005 |
URL: http://orgprints.org/3457/1/3457.pdf |
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| Thorup-Kristensen, Kristian; Brennan, Mary; Halberg, Niels; Cooper, Julia; Lampkin, Nic; Niggli, Urs. |
| QLIF researchers have collected data on the environmental and economic impact of a series of production measures. This will be the basis for this workshop which aims to analyse the efficiency of organic and low-input systems concerning the use of land, nutrients, water energy, and climate change scenarios. Economic efficiency of different production systems with implication for markets and prices will be analysed. Furthermore, we will explore to which extend consumers value environmental benefits. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Biodiversity and ecosystem services. |
| Ano: 2008 |
URL: http://orgprints.org/13352/1/qlif%2Dworkshop5%2D4p%2Dthorup%2Dkristensen[1].doc |
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| Kidmose, Ulla; Jensen, Sidsel; Mejnertsen, Peter; Jørgensen, Johannes Ravn; Thorup-Kristensen, Kristian. |
| Eleven different wheat cultivars (Thaifun, Triso, Thasos, Trappe, Amaretto, Diskett, Økilde, Dache, Koga, Spelt and Emmer) were cultivated in an organic study using three different organic treatments (no manure, household waste compost and sewage sludge compost). Bread was baked with flour from each of the samples. The protein content, the gluten content and the Falling Number (FN) were measured for the flour samples and specific volum and sensory quality were measured on the bread samples. A big variation was found in protein and gluten content and Falling Number between flour samples of eleven different wheat cultivars that were grown using three different field treatments. A correlation was found between the protein content and the gluten content (R2 =... |
| Tipo: Journal paper |
Palavras-chave: Food security; Food quality and human health Breeding; Genetics and propagation Crop health; Quality; Protection Farm nutrient management. |
| Ano: 2015 |
URL: http://orgprints.org/29517/1/Kidmose%20et.%20al.%20Manus%20cultivar%20RoCo%201.12.15.pdf |
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| Stavridou, Eleftheria; Thorup-Kristensen, Kristian; Young, Scott D.. |
| Selenium (Se) release from four plant species (Indian mustard, fodder radish, Italian ryegrass and hairy vetch) was measured under controlled leaching conditions and in a pot incubation experiment as part of a study of the potential for using these plant species as Se catch crops. Catch crops may reduce Se leaching and, by subsequent release of Se from the plant material, increase the available Se for succeeding crops. Plants grown both without and with Se addition (250 g Se/ha) were tested. In the leaching experiment, frozen plant material was incorporated into soil columns and incubated at room temperature for up to 19 weeks. The results showed that Se concentrations in the leachate were higher when Se-enriched plant material was incorporated in the... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover; Farm nutrient management. |
| Ano: 2011 |
URL: http://orgprints.org/19589/4/19589.pdf |
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| Thorup-Kristensen, Kristian. |
| I artiklen præcenteres resultater og erfaringer fra 8 års forsøg med økologisk grønsagssædskifte ved Danmarks JordbrugsForskning i Årslev. En af de centrale resultater er at det har meget stor effekt at holde markerne grønne i efteråret. Selvom der har ingået mange forskellige typer efterårsdække, fra helårsgrøngødning, til efterafgrøder med og uden bælgplanter og endda kålstub der har fået lov at gro videre efter at kålhovederne er høstet, så har det grundlæggende haft den samme effekt. Med plantedække i efteråret efterlades der langt mindre N i jorden som kan udvaskes, men om foråret mineraliseres der væsentligt mere N i jorden som kan udnyttes af den følgende afgrøde. Grøngødning giver naturligvis større mineralisering end f.eks. kålstub, men den... |
| Tipo: Journal paper |
Palavras-chave: Production systems; Vegetables. |
| Ano: 2004 |
URL: http://orgprints.org/3882/1/3882.rtf |
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| Czaban, Weronika; Clement, Corentin; Han, Eusun; Dresbøll, Dorte Bodin; Thorup-Kristensen, Kristian. |
| Sustaining an increasing human population with decreasing soil resources is a great challenge of the 21st century. Suboptimal availability of water and N are primary limitations to plant growth in the low-input agroecosystems in developing nations, whereas intensive fertilization at the cost of substantial environmental pollution is a problem in rich countries. The development of crops with greater rooting depth addresses these challenges. Deeper rooting improves water and nutrient uptake, which in turn reduces the need of application of external resources. In our study, we investigate the effect of intercropping on the deep root development and nutrient uptake in sugar beet – chicory mixture. The crops were chosen due to their deep roots and similar... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farm nutrient management. |
| Ano: 2018 |
URL: http://orgprints.org/33979/1/Poster%20-%20designguide%20FINAL_Weronika%20Czaban.pdf |
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| Dresbøll, Dorte Bodin; Thorup-Kristensen, Kristian. |
| The hypothesis that delayed addition of nutrient rich material to compost would influence the mineralisation pattern was investigated by studying N turnover in compost based on wheat straw and clover-grass hay. After 7½ weeks of composting almost twice as much N was mineralised when the addition of of some of the N-rich clover-grass hay was postponed, suggesting that this influenced the microbial succession. The delayed addition resulted in a second temperature peak and a decline in the pH. Despite the altered conditions no significant effect was observed on the weight loss or loss of C and N. In conclusion, compost processes can in a simple way be affected by delayed substrate application leading to a higher nutrient availability without altering other... |
| Tipo: Journal paper |
Palavras-chave: Vegetables Composting and manuring Ornamentals; Flower bulbs and tree nurseries. |
| Ano: 2005 |
URL: http://orgprints.org/3419/1/3419.pdf |
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| Thorup-Kristensen, Kristian. |
| Når efterafgrøder etableres ved undersåning i korn, er det i praksis stort set altid rajgræs der anvendes. Men forsøg med forskellige efterafgrøder har vist at der kan være store fordele ved at vælge andre arter, både i miljøeffekt, i eftervirkning og i andre forhold. Vi har derfor undersøgt en række plantearter udsået som undersåede efterafgrøder i vårbyg. Flere af arterne har vist lovende egenskaber, der er bl.a. identificeret arter med markant dybere rodvækst end vi opnår med rajgræs. Farvevajd, som er en lille korsblomstret plante har vist sig velegnet til undersåning. Den er meget lovende, da den kombinerer en meget dyb rodvækst med lavt C/N forhold i biomassen og dermed en bedre eftervirkning end de fleste andre efterafgrøder. |
| Tipo: Newspaper or magazine article |
Palavras-chave: Production systems. |
| Ano: 2004 |
URL: http://orgprints.org/3885/1/3885a.rtf |
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| Stavridou, Eleftheria; Broadley, Martin R.; Thorup-Kristensen, Kristian; Young, Scott D.. |
| Selenium (Se) is an essential nutrient for animals, humans and microorganisms. The importance of Se in the prevention, as well as the treatment, of chronic and degenerative diseases in humans has been established. Catch crops have been used successfully in agriculture to improve soil fertility, increase nitrogen and sulfur content in the soil and avoid nutrient leaching. The intention of the present study was to estimate the net Se mineralization rate from plant material, relative to inorganic salts, and to evaluate the risk of Se leaching after their application. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farm nutrient management. |
| Ano: 2009 |
URL: http://orgprints.org/19591/1/NetMineralizationRateOfSeleniumProceeding_ELST.pdf |
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| Wang, Yaosheng; Thorup-Kristensen, Kristian; Jensen, Lars Stoumann; Magid, Jakob. |
| Rodsystemer er vigtige for planters optagelse af vand og næringsstoffer og dermed for vækst og ud-bytte, specielt under forhold med lav tilgæn- gelighed af jordens næringsstoffer. I det økologiske RDD projekt RoCo har vi undersøgt rodvækst, rodfordeling og roddybde samt rodhårs- karakteristika for forskellige sorter af vårhvede. Resultaterne af vores forsøg viser, at der er en stor variation i rod- og rodhårskarakteristika mellem forskellige vårhvedesorter, og disse er afgørende for, samt gene- tisk relateret til, afgrødens vækst og optagelse af næringsstoffer. Derfor er vital rodvækst og lange og tætte rodhår vigtige mål for selektion og fremtidig forædling af vårhvede til økologisk jordbrug. |
| Tipo: Newspaper or magazine article |
Palavras-chave: Soil quality Nutrient turnover Breeding; Genetics and propagation. |
| Ano: 2014 |
URL: http://orgprints.org/27914/7/27914.pdf |
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| Pedersen, Anders; Zhang, Kefeng; Jensen, Lars Stoumann; Thorup-Kristensen, Kristian. |
| Plant soil and atmosphere models are commonly used to predict crop yield and associated environmental consequences. Such models often include complex modelling of water movement, soil organic matter turnover and above ground plant growth. However, the root modelling in these models is often very simple, partly due to a limited access to experimental data. Here we propose a root model developed to describe root growth, root density and nitrogen uptake. The model focuses on annual crops, and attempts to model root growth of different crop species and row crops and its significance for nitrogen uptake from different parts of the soil volume. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions; Biodiversity and ecosystem services. |
| Ano: 2007 |
URL: http://orgprints.org/10745/1/10745.pdf |
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| Thybo, Anette K.; Edelenbos, Merete; Christensen, Lars P.; Sørensen, Jørn Nygaard; Thorup-Kristensen, Kristian. |
| Tomato plants were grown in open beds, confined beds, or combined beds with compost based on clover grass hay, deep litter and peat. Due to only minor effects of growing systems on sensory quality and chemical composition of tomato fruits is was concluded that it is possible to produce tomato fruits in confined and combined soil bed systems without any loss in eating quality. Actually the results indicate, that a slight increase in quality of tomatoes from the confined and combined systems is obtained. The present result points to the fact that confined and combined growing systems may be new relevant commercial growing systems, in which the quality of tomatoes seems to be ensured, and in which nutrient loss and root diseases contamination can be reduced. |
| Tipo: Journal paper |
Palavras-chave: Vegetables. |
| Ano: 2006 |
URL: http://orgprints.org/4657/1/Tomato_growing_systems.pdf |
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| Meyling, Nicolai V.; Thorup-Kristensen, Kristian; Eilenberg, Jørgen. |
| The below- and aboveground communities of fungal entomopathogens (Ascomycota: Hypocreales) were investigated in an experimental conventional and organic vegetable cropping system over two seasons in Denmark. The experimental design allowed for evaluating differences between farming practices in the occurrence of soil-borne fungal entomopathogens and as natural infections aboveground in arthropod hosts. Belowground, Metarhizium anisopliae dominated the agricultural field with Beauveria bassiana, Metarhizium flavoviride and Isaria fumosorosea being present at lower frequencies. Abundances of M. anisopliae were not different between conventional and organic soils. Aboveground, B. bassiana was the most common fungal entomopathogen in arthropod host cadavers.... |
| Tipo: Journal paper |
Palavras-chave: Soil biology; Biodiversity and ecosystem services. |
| Ano: 2011 |
URL: http://orgprints.org/19301/4/19301.pdf |
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| Registros recuperados: 112 | |
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