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Registros recuperados: 112
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A model analysis on nitrate leaching under different soil and climate conditions and use of catch crops Organic Eprints
Pedersen, Anders; Stoumann Jensen, Lars; Thorup-Kristensen, Kristian.
The use of crops and catch crops with deep rooting can strongly improve the possibility of retaining nitrate-N that will otherwise be leached to the deeper soil layers and end up in the surrounding environment. But will it always be an advantage for the farmer to grow a catch crop? This will depend on factors such as soil mineral nitrogen level, soil water holding capacity, winter precipitation, rooting depth and N demand of the scceeding crop. These factors interact, and it can be very difficult for farmers or advisors to use this information to decide whether growing a catch crop will be beneficial. To analyse the effect of catch crops under different Danish soil and precipitation conditions, we used the soil, plant and atmosphere model Daisy.
Tipo: Conference paper, poster, etc. Palavras-chave: Nutrient turnover; Post harvest management and techniques; Crop combinations and interactions; Farm nutrient management; Soil quality.
Ano: 2005 URL: http://orgprints.org/7831/1/7831.pdf
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A row cropping system with cover crops for balancing weed and soil fertility management in organic cereal production Organic Eprints
Phan, Hong TT; Thorup-Kristensen, Kristian.
This manuscript shows the result from testing the new row cropping system for its ability to produce a balanced combination of inter-row hoeing and undersown cover crop in order to obtain a sufficient N supply and an effective weed control as well as to identify optimal sowing time for high biomass production and cover crop species suited for late undersowing. The new system produced a sufficient N supply and an acceptable weed control effect, leading to an improvement in the subsequent crop yield. Yield in this system is potentially improved further because some managements are suggested to increase its weed control effect, especially for the perennial creeping thistle cirsium arvense.
Tipo: Journal paper Palavras-chave: Nutrient turnover; Research communication and quality; Biodiversity and ecosystem services; Farm nutrient management; Europe.
Ano: 2019 URL: http://orgprints.org/35191/1/Manuscript-rowcrop%20system.pdf
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Agronomic factors affecting yield and quality of extractable leaf protein 1 concentrate (LPC) in forage crops Organic Eprints
Ytting, Nanna Karkov; Thorup-Kristensen, Kristian.
The study aims to find the optimal cutting strategy and forage plant species for organic production of leaf 11 protein concentrate (LPC) and to investigate if sulfur fertilization have a positive effect on the content of the 12 sulfur containing amino acids cystine and methionine. The protein recovery in green juice and amino acid 13 composition of the proteins were measured for 23 common and alternative forage species grown in an 14 organic cropping trial. Total protein yield in green juice was measured for three different cutting strategies (2, 15 3 and 4 cuts per season) in three different forage species mixtures. The forage species mixtures were given 16 three levels of sulfur fertilization (0, 30 and 60 kg S ha-1). Results indicated that the economic...
Tipo: Journal paper Palavras-chave: "Organics" in general; Pasture and forage crops; Farming Systems.
Ano: 2018 URL: http://orgprints.org/33331/1/Manuscript_Agronomic%20factors%20affecting%20yield%20and%20quality%20of%20Leaf%20Protein%20Concentrate.pdf
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An organic and environmentally friendly growing system for greenhouse tomatoes Organic Eprints
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. Plants grown in the confined and the combined beds produced the earliest tomatoes. During the first five weeks of harvest, approximately 18% of the fruits produced in confined beds developed blossom end rot. This disorder was hardly developed in the other growing systems. After five weeks of harvest, these differences in fruit production were unchanged or even increased. Plants grown in the confined beds produced significantly less fruit load compared with the other bed types, especially in 2003. Application of supplemental fertilizer did not significantly increase the fruit production in any year.
Tipo: Journal paper Palavras-chave: Vegetables.
Ano: 2006 URL: http://orgprints.org/4624/1/4624.pdf
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An organic vegetable crop rotation aimed at self-sufficiency in nitrogen Organic Eprints
Thorup-Kristensen, Kristian.
The paper describes the organic vegetable crop rotation. The ideas behind the design of the crop rotation, the use of green manures and catch crops, and how information on crop root growth has been used to try to design a crop rotation with a high NUE and minimal N leaching losses. The results from the first years of the rotation, in terms of yield and N uptake of the crops and of the content of inorganic N in the soil are presented.
Tipo: Conference paper, poster, etc. Palavras-chave: Production systems; Vegetables.
Ano: 1999 URL: http://orgprints.org/1910/1/rotation.pdf
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ARE HARVEST AND SENSORY QUALITY OF LETTUCE AND ONION INFLUENCED BY GROWING CONDITIONS IN A CONVENTIONAL AND THREE ORGANIC CROPPING SYSTEMS? Organic Eprints
Kristensen, Hanne L.; Kidmose, Ulla; Dresbøll, Dorte Bodin; Thorup-Kristensen, Kristian.
Differences in nutrient availability and methods of pest management may affect crop growth and product quality. The question is whether conventional and organic cropping systems, which differ clearly in strategies for nutrient and pest management, influence the harvest and sensory quality of the products? With the aim to elucidate this question, lettuce and onion were grown in a conventional and three organic cropping systems with increasing levels of nutrient re-cycling and use of intercrops for natural pest management in the period of 2007-2009. The conventional and first organic system relied fully on external inputs in the form of NPK or liquid manure for nutrient management, respectively. In the second organic system, low external inputs of liquid...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop combinations and interactions; Vegetables.
Ano: 2011 URL: http://orgprints.org/19586/3/19586.pdf
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Arter af efterafgrøder og deres egnethed til rækkedyrkning Organic Eprints
Thorup-Kristensen, Kristian; Thi Thuy, Hong Phan.
Studie af en række efterafgrøder og deres egnethed til dyrkning i et system med korn i rækkedyrkning.
Tipo: Conference paper, poster, etc. Palavras-chave: Crop combinations and interactions; Soil tillage; Weed management.
Ano: 2017 URL: http://orgprints.org/33097/1/%C3%98kologikongres%20Kristian%20Thorup%20RowCrop.pdf
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Assessment of selenium mineralization and availability from catch crops Organic Eprints
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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Baking performance and sensory quality of organic wheat cultivars Organic Eprints
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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Bedre sædskifter med dybe rødder Organic Eprints
Thorup-Kristensen, Kristian.
Artiklen omtaler mulighederne for at udnytte dyb rodvækst hos nogle afgrøder og efterafgrøder til at udvikle bedre sædskifter
Tipo: Newspaper or magazine article Palavras-chave: Farm nutrient management.
Ano: 2007 URL: http://orgprints.org/11431/1/11431.pdf
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Below- and aboveground abundance and distribution of fungal entomopathogens in experimental conventional and organic cropping systems. Organic Eprints
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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Below- and aboveground abundance and distribution of fungal entomopathogens in experimental conventional and organic cropping systems Organic Eprints
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/19680/4/19680.pdf
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Beregning af kvælstoftilførsel i sædskiftet Organic Eprints
Thorup-Kristensen, Kristian.
Grønsagsproduktion er mange steder i Europa en vigtig kilde til kvælstofudvaskning. For at forebygge dette, er det vigtigt at kunne beregne tilgængelighed og udvaskning af kvælstof i grønsagssædskifter. En ny computermodel - EU-rotate – kan hjælpe til med at optimere kvælstoftilførsel og sædskifteplanlægning.
Tipo: Newspaper or magazine article Palavras-chave: Vegetables; Air and water emissions.
Ano: 2008 URL: http://orgprints.org/16336/1/16336.pdf
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Betydningen af komposttype for kvaliteten af økologisk hvedebrød Organic Eprints
Kidmose, Ulla; Jensen, Sidsel; Thorup-Kristensen, Kristian.
Næringsstoftilførsel fra forskellige kompostkilder under dyrkning af økologisk brødhvede i marken ser ud til at påvirke den sensoriske kvalitet af hvedebrød.
Tipo: Newspaper or magazine article Palavras-chave: Food security; Food quality and human health Recycling; Balancing and resource management Food systems.
Ano: 2013 URL: http://orgprints.org/24807/7/24807.pdf
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Brassicas in sustainable production and organic farming Organic Eprints
Thorup-Kristensen, Kristian.
Brassica plant species show some characteristics in their use of plant nutrients which make them different from most other crops. These characteristics often make brassicas difficult to grow in low-input systems with limited nutrient availability, but at the same time they also make some brassica species valuable tools for reducing nitrate leaching losses and improving N management in farming systems. The paper presents experimental results on brassica crops as main crops and cover crops.
Tipo: Conference paper, poster, etc. Palavras-chave: Vegetables; Air and water emissions.
Ano: 2008 URL: http://orgprints.org/16320/1/16320.pdf
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Brug efterafgrøder rigtigt i sædskiftet Organic Eprints
Thorup-Kristensen, Kristian.
Danish farmers are required to grow around 300.000 hektares of catch crops each year, as part of the Danish regulations of N use and losses from agriculture. The rules set some minimum requirements about how to grow catch crops, but do not attempt to optimize the effects of the catch crops. In the paper it is discussed how farmers can improve the effects of catch crops, both the environmental effects and the effects on nitrogen supply for succeeding agricultural crops. It is shown that it is highly important which plant species are grown, as there are large differences in their root growth and winter hardines. It is also shown that the species choice may have suprising large effects on the N supply for the succeeding crop.
Tipo: Newspaper or magazine article Palavras-chave: Cereals; Pulses and oilseeds Crop combinations and interactions Vegetables Composting and manuring.
Ano: 2005 URL: http://orgprints.org/8042/1/8042.pdf
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Catch crops and green manures as biological tools in nitrogen management in temperate zones Organic Eprints
Thorup-Kristensen, Kristian; Magid, Jacob; Jensen, Lars Stoumann.
The review deals with the effects of nitrogen catch crops or green manures on the N dynamics of agricultural systems. The mechanisms of their effects are discussed, and it is discussed how they can be used to achieve the agricultural and environmental goals of N management.
Tipo: Book Palavras-chave: Nutrient turnover; Soil quality; Production systems.
Ano: 2003 URL: http://orgprints.org/107/4/107.pdf
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Catch Crops in Organic Farming Systems without Livestock Husbandry - Simulations with the DAISY model Organic Eprints
Müller, Torsten; Thorup-Kristensen, Kristian; Magid, Jakob; Jensen, Lars Stoumann; Hansen, Søren.
This paper presents simulations of the soil-plant-atmosphere model DAISY based on an organic crop rotation with incorporation of different catch crops following pea as a leguminous cash crop. Special emphasise was put on the simulation of N-mineralisation/-immobilisation and of soil microbial biomass N. The DAISY model was able to simulate soil mineral N and soil microbial biomass N after soil incorporation of catch crop plant residues to some extend. Several processes need further attention and may be integrated into the DAISY model: (1) soil tillage induced mobilisation of organic material including considerable amounts of organic N, (2) winter killing of sensitive plant species and varieties, (3) decomposition of plant residues at the soil surface as...
Tipo: Journal paper Palavras-chave: Nutrient turnover; Crop combinations and interactions; Production systems; Air and water emissions.
Ano: 2006 URL: http://orgprints.org/7886/2/7886.pdf
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Chicory Grows Roots Below 3 m Is That Beneficial under Water Stress? Organic Eprints
Rasmussen, Camilla Ruø; Dresbøll, Dorte Bodin; Thorup-Kristensen, Kristian.
Introduction Water scarcity is a major limitation to crop production worldwide. Deep-rooted crops can potentially allow exploitation of water that more shallow rooted crops cannot access. Several agricultural crops grow roots of several meters depth within a growing season, and thereby get access to water originating from wet season surplus precipitation stored in the soil. The aim of this study was to test the hypotheses 1) that chicory roots can grow below 3 m within a growing season and 2) that chicory shifts its water uptake downwards when the top soil dries out. Materials and Methods Chicory (Cichorium intybus L. cv Chicoree Zoom F1) was grown in 4 m tall rhizotrons in monoculture under dry or wet conditions and intercropped with either ryegrass...
Tipo: Conference paper, poster, etc. Palavras-chave: Production systems Crop health; Quality; Protection Irrigation and drainage.
Ano: 2018 URL: http://orgprints.org/34370/3/Poster%20-%20Camilla_34370.pdf
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Combination of undersown catch crops and row-hoeing for optimizing nitrogen supply and weed control in organic spring barley Organic Eprints
Phan, Hong TT; Thorup-Kristensen, Kristian.
This is an early result of a field experiment where we aimed to optimize a row cropping system for organic cereal production with the use of undersown cover crops in combination with inter-row hoeing.
Tipo: Conference paper, poster, etc. Palavras-chave: Nutrient turnover; Biodiversity and ecosystem services; Denmark; Farm nutrient management; Knowledge management; Europe; Regulation.
Ano: 2015 URL: http://orgprints.org/33096/1/FSD5%20conference%20paper-Hong.pdf
Registros recuperados: 112
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