Consulta: creatorFacets:"Thorup-Kristensen, Kristian"
Registros recuperados: 112
Data/hora: 16/06/2024 10:50:37

Long-term stability and mineralisation rate of compost is influenced by timing of nutrient application during composting of plant residues
Provedor de dados: 21
Autores: Dresbøll, Dorte Bodin; Magid, Jakob; Thorup-Kristensen, Kristian.
The long-term nitrogen mineralization and stability of compost based on easily available plant residues was examined. Four different composts were prepared from wheat straw and clover-grass hay, one treatment receiving all material initially (100/0), two treatments where addition of 75% of the clover-grass was postponed for 3 weeks (75/25,3w) respectively 8 weeks (75/25,8w) and one treatment receiving only 25% of the clover-grass added to the other treatments (25/0). Mineralization and stability of the compost was followed for 24 weeks in leaching tubes, leached regularly by 0.01 M CaCl2. Postponing the addition of the clover-grass hay for 3 weeks (75/25,3w) during composting had a significant effect on the N mineralization rate leading to more mineralised...
Tipo: Journal paper
Palavras-chave: Composting and manuring.
Ano: 2006
URL: http://orgprints.org/3494/1/3494.pdf

Assessment of selenium mineralization and availability from catch crops
Provedor de dados: 21
Autores: 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

Forslag til øget kvælstofeffekt af efterafgrøder ved optimeret artsvalg, management og placering
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
Kapitlet handler om muligheden for at ændre reglerne for dyrkning af efterafgrøder, således at effekten af at dyrke efterafgrøder forbedres. Der fokuceres på muligheden for at 1) inddrage nye arter af efterafgrøder, især for at opnå større roddybde, 2) at ændre regler om nedmuldningstid så der i hvert fald på sandjord bliver krav om vinterfaste efterafgrøder der først nedmuldes om foråret, 3) at sikre en mere optimal placering af efterafgrøderne i sædskiftet og på dyrkning af efterafgrøder primært på bedriftstyper hvor der er mest kvælstof i kredsløb og hvor efterafgrødern derfor kan få størst effekt, og 4) mere overordnet at dyrke efterafgrøder i de egne af landet hvor de vil gøre den størst muligt miljømæssige gavn.
Tipo: Report chapter
Palavras-chave: Nutrient turnover Cereals; Pulses and oilseeds Production systems Vegetables.
Ano: 2004
URL: http://orgprints.org/3890/1/3890.rtf

Beregning af kvælstoftilførsel i sædskiftet
Provedor de dados: 21
Autores: 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

Optimising nutrition in organic tomato production
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
The abstract describes experiments with different cropping systems for organic greenhouse production of tomatoes. In this experiment two main questions are adressed. As greenhouse tomato production is a very intensive monoculture production, problems with nutrient supply and balances are expected, and problems with soilborne pests and diseases are widespread. To counter such problems, we compare the normal method of soil grown tomatoes with systems where tomatoes are grown in compost filled boxes. This allows to control nutrient losses and prevent carry over of diseses and pests in the soil. We also study an intermediate system, where where tomatoes are established in compost filled boxes, but the roots are allowed to develop also in the soil outside the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover Crop health; Quality; Protection Vegetables Greenhouses and coverings.
Ano: 2003
URL: http://orgprints.org/4644/1/4644.rtf

Root growth vigour is a better predictor than root hair traits of early nutrient uptake in spring wheat plants grown at low soil fertility
Provedor de dados: 21
Autores: Wang, Yaosheng; Thorup-Kristensen, Kristian; Jensen, Lars Stoumann; Magid, Jakob.
Background and Aims A number of root and root hair traits have been proposed as important for acquisition of P. However, it remains unknown whether these traits are most important in determining macro- and micronutrient uptake at low soil fertility. This study investigated the variations in root and root hair traits among spring wheat genotypes and examined which root and root hair traits are most important for high uptake of macro- and micronutrients.   Methods Six spring wheat genotypes were grown in a soil with low nutrient availability. The root and root hair traits as well as the content of macro- and micronutrients were identified.   Results A significant genetic variability in root and root hair traits was found. High root growth vigour and long and...
Tipo: Journal paper
Palavras-chave: Soil quality Composting and manuring Breeding; Genetics and propagation.
Ano: 2014
URL: http://orgprints.org/27912/8/27912.pdf

Rækkedyrkning af korn med efterafgrøde tegner lovende
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
Foreløbige resultater fra forsøg med dyrkning af korn på rækkeafstand for at kunne bekæmpe ukrudt med radrensning og efterfølgende etablere efterafgrøder tyder på gode muligheder for at bruge metoden. Resultaterne viser at der  kan opnås bedre frugtbarhed og mindre nitratudvaskning, og tyder samtidig på at i hvert fald kraftige efterafgrøder også kan reducere tidslebestanden.
Tipo: Newspaper or magazine article
Palavras-chave: Production systems; Crop combinations and interactions; Soil tillage; Weed management.
Ano: 2016
URL: http://orgprints.org/30113/1/R%C3%A6kkedyrkning%20af%20korn%20med%20efterafgr%C3%B8de%20tegner%20lovende.docx

Crop yield, root growth, and nutrient dynamics in a  conventional and three organic cropping systems with  different levels of external inputs and N re-cycling through fertility building crops
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian; Dresbøll, Dorte Bodin; Kristensen, Hanne L.
One core idea behind organic production is that cropping  systems should be less dependent on resource import than conventional production and minimize negative environmental effects. This study aimed to test novel organic rotations, designed to reduce reliance on external resource import. We compared a conventional system (C) and an organic system relying on manure import (O1) to two rotations (O2 and O3), both relying on autumn cover crops for soil fertility, and in O3 green manure rows were left as intercrops. Resource import differed between 149, 85, 25 and 25 kg N ha-1 year-1 in C, O1, O2 and O3.  Crop yields were lower in the organic systems (on average 82% of conventional yields), differing among crops, when based on the area grown with main crops....
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Farming Systems; Crop husbandry; Soil; Vegetables; Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/19701/4/19701.pdf

Catch crops and green manures as biological tools in nitrogen management in temperate zones
Provedor de dados: 21
Autores: 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

Organic Food and Health: A new project to study the effects of plant cultivation methods (organic and conventional) on nutritional value, health and reproduction in an animal experiment
Provedor de dados: 21
Autores: Brandt, Kirsten; Nygaard Larsen, Hanne; Andersen, Jens-Otto; Mølgaard, Jens-Peter; Lauridsen, Charlotte; Jørgensen, Henry; Gundersen, Vagn; Larsen, Erik; Badsberg, Jens Henrik; Thorup-Kristensen, Kristian.
Many consumers believe that food from plants grown under certain conditions, such as organic agriculture, will benefit health more than conventional food. This cannot be determined simply by analysing the material, since our understanding of the connections between food components and health is still to imprecise for such a purpose. Rather than waiting until basic research provides the knowledge needed for this approach, in the spring of 2001 we have initiated a project to study physiological effects of plant quality directly, in an animal experiment.     The following cultivation treatments are used to grow plants that are typical ingredients for a human diet (potato, mature peas, kale, spring wheat, oilseed rape, carrots and apples):    1. A model of a...
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health Crop health; Quality; Protection Specific methods.
Ano: 2001
URL: http://orgprints.org/1702/1/DARCOFposterhealthlille.pdf

Effects of green manure herbage management and its digestate from biogas production on barley yield, N recovery, soil structure and earthworm populations
Provedor de dados: 21
Autores: Frøseth, Randi Berland; Bakken, Anne Kjersti; Bleken, Marina Azzaroli; Riley, Hugh; Pommeresche, Reidun; Thorup-Kristensen, Kristian; Hansen, Sissel.
In repeatedly mown and mulched green manure leys, the mulched herbage contains substantial amounts of nitrogen (N), which may only slightly contribute to the following crops’ nutrient demand. The objective of the present work was to evaluate the effect of alternative strategies for green manure management on the yield and N recovery of a subsequent spring barley crop, and their short term effects on soil structure and earthworm populations. A field trial was run from 2008 to 2011 at four sites with contrasting soils under cold climate conditions. We compared several options for on-site herbage management and the application of anaerobically digested green manure herbage. Depending on the site, removal of green manure herbage reduced the barley grain yield...
Tipo: Journal paper
Palavras-chave: Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/26212/2/Fr%C3%B8seth%20et%20al%202014%20Effects%20of%20green%20manure%20herbage%20management.pdf

Intercropping affects glucosinolate content in broccoli
Provedor de dados: 21
Autores: Stavridou, Eleftheria; Schreiner, Monika; Thorup-Kristensen, Kristian; Krumbein, Angelika.
Numerous studies proposed that the protective effect of cruciferous vegetables against cancer may be due to their relatively high content of sulfur-containing glucosinolates. Nitrogen (N) and sulfur (S) application significantly affect glucosi¬nolate concentration in plants. Total S requirement differs between crop species; in general S demand of Cruciferae is high. S supply has an impact on the total glucosinolate concentration but also on the relative proportions on the individual glucosinolates. Investigations showed that in broccoli plants, total glucosinolate concentrations were high at insufficient N supply, independent of the S level. This study aimed to improve the nutritional value of broccoli (Brassica oleracea var. italica) by intercropping. A...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Vegetables; Farm nutrient management.
Ano: 2010
URL: http://orgprints.org/19593/3/19593.pdf

Proteomic and endophytic changes during storage of organically and conventionally grown carrots
Provedor de dados: 21
Autores: LOUARN, Sébastien; NAWROCKI, Arkadiusz; Thorup-Kristensen, Kristian; Søgaard Lund, Ole; NØRREGAARD JENSEN, Ole; Collinge, David B.; Jensen, Birgit.
This study utilises physiologically independent assays to  evaluate whether there are differences in the way that organically and conventionally grown carrots develop during storage. Thus quantitative proteomics and sampling the endophytic micromycota of stored carrots provide two different assessments of the physiological state of stored carrots.
Tipo: Journal paper
Palavras-chave: Vegetables; Weed management; Post harvest management and techniques; Root crops.
Ano: 2011
URL: http://orgprints.org/19485/4/19485.pdf

Brassicas in sustainable production and organic farming
Provedor de dados: 21
Autores: 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

An organic vegetable crop rotation aimed at self-sufficiency in nitrogen
Provedor de dados: 21
Autores: 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

The use of computer modelling to evaluate the agronomic, economic and environmental impacts of N management in contrasting organic rotations
Provedor de dados: 21
Autores: Rayns, Francis; Schmutz, Ulrich; Firth, Chris; Thorup-Kristensen, Kristian; Zhang, Kefeng; Rahn, Clive.
A new computer model (EU-ROTATE_N) has been developed with the aim of improving nitrogen management on all farms across Europe which include fi eld vegetables in their rotations. It brings together aspects of many existing models and contains a number of features to make it applicable to organic producers (e.g. taking account of nitrogen fixation by legume containing leys, nitrogen conservation by winter cover crops and nitrogen supply by manures and composts). A key feature is the model’s ability to simulate economic output and this enables it to be of value to policy makers when considering the impact of new measures to reduce environmental pollution. This paper describes the model and some initial work that has been conducted to evaluate it under UK...
Tipo: Conference paper, poster, etc.
Palavras-chave: Farm nutrient management; Vegetables; Farm economics.
Ano: 2006
URL: http://orgprints.org/10215/1/10215.pdf

Low-P solution culture may assist screening of root growth vigor in soil for high nutrient uptake of spring wheat varieties
Provedor de dados: 21
Autores: Wang, Yaosheng; Andersen, Sven Bode; Thorup-Kristensen, Kristian; Jensen, Lars Stoumann; Magid, Jakob.
Root and root hairs of plants have been intensively studied in solution culture; however, correlation of such measurements in solution culture with development in soil is poorly understood. This study compared growth of roots and root hairs as well as uptake of macro- and micronutrients of six spring wheat varieties in solution culture under P stress and P abundance and in a low fertility soil. Results showed that root length and surface area under P stress was significantly positively correlated with that in the low fertility soil, while no such correlation was apparent for root hair length and density. In absolute terms the root length, surface area, root hair length and density of spring wheat varieties were substantially higher in soil than in solution...
Tipo: Journal paper
Palavras-chave: Soil quality Breeding; Genetics and propagation.
Ano: 2014
URL: http://orgprints.org/27913/3/27913.pdf

Quantitative proteomics by 2DE and MALDI MS/MS uncover the effects of organic and conventional cropping methods on vegetable products
Provedor de dados: 21
Autores: NAWROCKI, Arkadiusz; Thorup-Kristensen, Kristian; Jensen, Ole Nørgaard.
Organic farming aims to be environmentally sound, but the question as to whether organic cropping brings more nutritional benefits to farmers and consumers than the conventional cropping needs still to be answered. To gain insights into the molecular effects of organic farming we used proteome analysis to analyze cabbage (Brassica oleracea L. var ‘capitata’) and carrot (Daucus carota var. ‘sativus’) Our aim was to identify the metabolic pathways that are affected by different cropping regimes and thus, may have an effect on quality, storability and pathogen resistance of crops. By means of two dimensional gel electrophoresis and MALDI tandem mass spectrometry we compared proteomes of cabbage and carrot root, obtained in the first growth season, cropped...
Tipo: Journal paper
Palavras-chave: Production systems; Crop combinations and interactions; Vegetables.
Ano: 2011
URL: http://orgprints.org/19595/1/Norgaard_et_al_JPROT%2DS%2D10%2D00154%2D2.pdf

Agronomic factors affecting yield and quality of extractable leaf protein 1 concentrate (LPC) in forage crops
Provedor de dados: 21
Autores: 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

Simulating Root Density Dynamics and Nitrogen Uptake -Field Trials and Root Model Approach in Denmark
Provedor de dados: 21
Autores: 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

ARE HARVEST AND SENSORY QUALITY OF LETTUCE AND ONION  INFLUENCED BY GROWING CONDITIONS IN A CONVENTIONAL AND THREE ORGANIC CROPPING SYSTEMS?
Provedor de dados: 21
Autores: 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

RoCo 2011-2013: Rødder og kompost, økologisk dyrkning med begrænset tilgængelighed af næringsstoffer
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
Folder med beskrivelse af RoCo projektet. De vigtigste emner i projektet er 1) undersøgelse af sortsvariation i rodvækst og næringsstofudnyttelse i sorter af vårhvede, salat og løg, 2) udvikling af komposttyper på basis af byaffald, 3) test og demonstration af kompost og hvedesorter, 4) udvikling af bagemetoder der tillader bagning med mel med lavere proteininghold og 5) undersøgelse af holdninger og barierrer for recirkulering af byaffaldskilder som gødning til økologisk jordbrug.
Tipo: Other
Palavras-chave: Composting and manuring Nutrient turnover Crop husbandry Breeding; Genetics and propagation Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/19950/4/19950.pdf

Discrimination of conventional and organic white cabbage from a long-term field trial study using untargeted LC-MS-based metabolomics
Provedor de dados: 21
Autores: Mie, Axel; Laursen, Kristian Holst; Aberg, K. Magnus; Forshed, Jenny; Lindahl, Anna; Thorup-Kristensen, Kristian; Olsson, Marie; Knuthsen, Pia; Larsen, Erik Huusfeldt; Husted, Søren.
The influence of organic and conventional farming practices on the content of single nutrients in plants is disputed in the scientific literature. Here, large-scale untargeted LC-MS-based metabolomics was used to compare the composition of white cabbage from organic and conventional agriculture, measuring 1,600 compounds. Cabbage was sampled in 2 years from one conventional and two organic farming systems in a rigidly controlled long-term field trial in Denmark. Using Orthogonal Projection to Latent Structures-Discriminant Analysis (OPLS-DA), we found that the production system leaves a significant (p = 0.013) imprint in the white cabbage metabolome that is retained between production years. We externally validated this finding by predicting the production...
Tipo: Journal paper
Palavras-chave: Farming Systems Food security; Food quality and human health Crop health; Quality; Protection Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/29054/1/Mie%202014%20Discrimination%20of%20conventional%20and%20organic%20white%20cabbage%20froma%20long-term%20field%20trial%20study%20using%20untargeted%20LC-MS-based%20metabolomics.pdf

Six years results from an organic vegetable crop rotation aimed at self-sufficiency in nitrogen
Provedor de dados: 21
Autores: 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

Modelling diverse root density dynamics and deep nitrogen uptake
Provedor de dados: 21
Autores: Pedersen, Anders; Zhang, Kefeng; Thorup-Kristensen, Kristian; Jensen, Lars Stoumann.
We present a 2-D model for simulation of root density and plant nitrogen (N) uptake for crops grown in agricultural systems, based on a modification of the root density equation originally proposed by Gerwitz and Page (1974). A root system form parameter was introduced to describe the distribution of root length vertically and horizontally in the soil profile. The form parameter can vary from 0 where root density is evenly distributed through the soil profile, to 8 where practically all roots are found near the surface. The root model has other components describing root features, such as specific root length and plant N uptake kinetics. The same approach is used to distribute root length horizontally, allowing simulation of root growth and plant N uptake...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Farm nutrient management; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/16106/1/16106.pdf

The effect of nutrient supply on the baking quality of organic wheat cultivars
Provedor de dados: 21
Autores: Kidmose, Ulla; Jensen , sidsel; Mejnertsen, Peter; Jørgensen, Johannes Ravn; Thorup-Kristensen, Kristian.
Five different wheat cultivars (Thifun, Triso, Thasos, Spelt and Emmer) were cultivated in an organic study using six different organic compost types (two different household waste composts, sewage sludge compost, fruit and vegetable compost and two different renescience compost types) and one control with no manure applied. Bread was baked with flour from each of the samples. The protein content, the gluten content and the falling number were measured for the flour samples and specific volume, the sensory quality and instrumental measured hardness were measured on the bread samples. Different compost types resulted in distinct different sensory profiles of the bread. However, the tested cultivars responded very different towards the different compost...
Tipo: Journal paper
Palavras-chave: Food security; Food quality and human health Consumer issues Quality and evaluation of inputs.
Ano: 2015
URL: http://orgprints.org/28899/9/28899.pdf

Winter wheat roots grow twice as deep as spring wheat roots, is this important for N uptake and N leaching losses?
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian; Cortasa, Montserrat Salmerón; Loges, Ralf.
Cropping systems comprising winter catch crops followed by spring wheat could reduce N leaching risks compared to traditional winter wheat systems in humid climates. We studied the soil mineral N (Ninorg) and root growth of winter- and spring wheat to 2.5 m depth during three years. Root depth of winter wheat (2.2 m) was twice that of spring wheat, and this was related to much lower amounts of Ninorg in the 1 to 2.5 m layer after winter wheat (81 kg Ninorg ha-1 less). When growing winter catch crops before spring wheat, N content in the 1 to 2.5 m layer after spring wheat was not different from that after winter wheat. The results suggest that by virtue of its deep rooting, winter wheat may not lead to high levels of leaching as it is often assumed in...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Farm nutrient management; Crop husbandry; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/16121/2/16121.pdf

Vælg det rigtige tidspunkt til nedpløjning af efterafgrøden
Provedor de dados: 21
Autores: Olesen, Jørgen E.; Thorup-Kristensen, Kristian.
Brugen af efterafgrøder har to hovedformål: reduceret kvælstofudvaskning og øget N-forsyning til efterfølgende afgrøder. Efterafgrødens nyttevirkning i den efterfølgende afgrøde afhænger af, om kvælstoffrigivelsen tidsmæssigt falder sammen med afgrødens behov for kvælstof. Flere forsøg gennemført ved Danmarks JordbrugsForskning tyder på at man kan forbedre eftervirkningen af ef-terafgrøder betydeligt ved at vælge det helt rigtige nedmuldningstidspunkt. Det handler ikke blot om nedmuldning enten efterår eller forår. Forårsnedmuldning må ikke ske for sent. Efterårsned-muldning bør kun bruges på lerjorderne, og det må ikke ske for tidligt.
Tipo: Newspaper or magazine article
Palavras-chave: Crop combinations and interactions.
Ano: 2003
URL: http://orgprints.org/1811/1/E0068.doc

Combining agronomic and breeding approaches for improved nutrient use efficiency
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
There is a strong need to improve agricultural nutrient use efficiency (NUE), but NUE is complex, and not even well defined. The abstract and presentation deal with how NUE is determined by the combination of Genetic, Environmental and Management factors (GxExM), and how genetics as well as crop management must be combined in order to achieve improved overall NUE.
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation Farm nutrient management.
Ano: 2013
URL: http://orgprints.org/24738/3/24738.pdf

Kapitel 1: Grøngødning og efterafgrøder, Kapitel 2: Grøngødningens biologi, og Kapitel 3: Grøngødningens virkninger
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
Teksten er manuskript til kapitel 1, 2 og 3 i en generel bog om grøngødning. Bogen skal omhandle grøngødning og efterafgrøder bredt, deres virkningsmekanismer og anvendelse i landbrug, gartnerri, parkdrift og privathaver. Bogen retter sig imod alle med interesse for grøngødning og biologi, og imod jordbrugsskoler mv.
Tipo: Book chapter
Palavras-chave: Nutrient turnover Cereals; Pulses and oilseeds Soil biology Vegetables Soil quality Fruit and berries Ornamentals; Flower bulbs and tree nurseries Crop health; Quality; Protection Production systems Soil tillage.
Ano: 2005
URL: http://orgprints.org/3892/1/3892.rtf

Improving N efficiency in barley through green manure management and biogas slurry
Provedor de dados: 21
Autores: Frøseth, Randi Berland; Bakken, Anne Kjersti; Bleken, Marina Azzaroli; Riley, Hugh; Thorup-Kristensen, Kristian; Hansen, Sissel.
In cereal production on stockless organic farms, green manure (GM) is commonly used to improve soil fertility. The clover-grass swards are mown frequently and the herbage is commonly mulched. The purpose of this study was to increase knowledge of the N-dynamics in such rotations, in order to suggest methods for improving N efficiency and thus organic cereal yields. The hypothesis was that spring application of biogas residue from anaerobic digestion of GM herbage increases the N uptake and yield of a subsequent barley crop, compared with repeatedly in situ mulching of the same GM herbage in the preceding season.  The effect of various GM treatments on spring barley yields and nitrogen dynamics was investigated, at four sites differing in soil and climatic...
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Farm nutrient management.
Ano: 2012
URL: http://orgprints.org/21128/1/Froseth_et_al_2012_Improving_N_efficiency_in_barley_through_green_manure_management_and_biogas_slurry.pdf

Effects of catch crops on the content of sulfur (S) and selenium (Se) in vegetables
Provedor de dados: 21
Autores: Stavridou, Eleftheria; Thorup-Kristensen, Kristian; Lauersen, Kristian Holst.
Selenium is an essential nutrient for animals, humans and microorganisms. Se deficiency in humans has been linked  to a plethora of physiological disorders.  Increasing evidences point to an anticarcinogenic  potential of Se-compounds.    To address Se deficiency in the human diet, agronomists and plant breeders are pursuing complementary strategies to produce crops with greater Se concentrations.    Catch crops have been used successfully in agriculture, increasing nitrogen and sulfur content in the soil and avoiding nutrient leaching. In this experiment we study whether catch crops can have similar beneficial effects regarding Se.
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health Vegetables.
Ano: 2008
URL: http://orgprints.org/16337/1/16337.pdf

Upward N redistribution - Postharvest effect of cover crops on creeping thistle (Cirsium arvense)
Provedor de dados: 21
Autores: Phan, Hong TT; Thorup-Kristensen, Kristian.
The study aimed to uncover the mechanism of how cover crops versus autumn tillage influences the competition of succeeding barley crop and thistle. By the difference in their effects on the N distribution, this gave barley or thistle an advantage to uptake more soil N than the other during the growing season of barley.
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general; Soil quality; Nutrient turnover; Research methodology and philosophy; Environmental aspects; Farm nutrient management.
Ano: 2018
URL: http://orgprints.org/35206/1/Conference%20Abstract.pdf

Wheat baking quality: The effect of catch crop strategies and species
Provedor de dados: 21
Autores: Pedersen, Lene; Thorup-Kristensen, Kristian; Loges, Ralf.
Abstract - In organic farming winter wheat is typically grown after good pre-crops, as it pays well for this in terms of yield and quality. However, winter wheat develops slowly during the autumn, and much nitrate may be lost by leaching before spring. System with catch crops followed by spring wheat, or maybe catch crops intercropped with winter wheat could improve the utilization of the pre-crop effects in wheat crop-ping. In this experiment we studied  wheat and catch crop root growth, crop and soil N dynamics, and ef-fects on yield and baking quality in wheat cropping systems with catch crops.  The results showed that the combination of catch crops and spring wheat increased the yield and decreased the gluten content, but the bread volume was...
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health Crop combinations and interactions.
Ano: 2006
URL: http://orgprints.org/7575/1/Paper_for_congress2006LP.doc

Roots below one meters depth are important for nitrate uptake by annual crops
Provedor de dados: 21
Autores: Kristensen, Hanne L.; Thorup-Kristensen, Kristian.
The root depths of annual crops vary from 0.2 m to more than 2 m depending on root growth rate and length of growing season. However, studies of root growth and N uptake are often restricted to a depth of 1 m or less, as root biomass is assumed to be negligible below this depth. We have studied the importance of root growth and N uptake to a depth of 2.5 m in fully grown field vegetables and cover crops by use of minirhizotrons and deep point placement of 15N. Deep rooted crucifereous crops were found to have high root densities to a depth of 1.5-2 m and high 15N uptake to this depth. The work shows that knowledge of the interactions between root growth and soil N below a depth of 1 m are important to understand crop N uptake and nitrate leaching from...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Vegetables.
Ano: 2006
URL: http://orgprints.org/11461/1/Deep_Roots_and_N_Uptake.htm

Improving nitrogen recovery from green manure on contrasting soil types under cold climate conditions
Provedor de dados: 21
Autores: Frøseth, Randi Berland; Hansen, Sissel; Thorup-Kristensen, Kristian; Bleken, Marina Azzaroli.
We evaluated the effects of various strategies for green manure management, including biogas production and using the herbage-based digestate as fertilizer, on the yield and N recovery of a subsequent spring barley crop. Of the various green manure herbage measures tested, the digestate strategy was be the most promising option with regard to reduced risk of N losses and improved N recovery by a subsequent spring barley crop. Removal of the herbage reduces the risk of N losses from the crop rotation, since such losses are highly dependent upon the N input and weather conditions. This study suggests that  fundamental model changes are needed for simulating the effects of low temperatures on N mineralization from fresh plant material.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop husbandry.
Ano: 2016
URL: http://orgprints.org/31210/1/Fr%C3%B8seth%20et%20al.%202016.%20IMPROVING%20NITROGEN%20RECOVERY%20FROM%20GREEN%20MANURE%20ON%20CONTRASTING%20SOIL%20TYPES%20UNDER%20COLD%20CLIMATE%20CONDITIONS.%2019th%20N-Workshop.27%20-29%20June%2C%20Skara%20Sweden.%20poster.pdf

The effect of catch crop species on selenium availability for succeeding crops
Provedor de dados: 21
Autores: Stavridou, Eleftheria; Young, Scott D.; Thorup-Kristensen, Kristian.
Background and Aims    Selenium (Se) is an essential nutrient for humans and animals. In order to ensure an optimal concentration of Se in crops, Se fertilisers are applied. Catch crops may be an alternative way to increase Se concentrations in vegetables.    Methods    Three experiments in Denmark between 2007–10 investigated the ability of catch crops (Italian ryegrass, fodder radish and hairy vetch) under different fertiliser regimes to reduce soil Se content in the autumn and to increase its availability in spring to the succeeding crop.    Results and Conclusions    The catch crops (Italian ryegrass and fodder radish) increased water-extractable Se content in the 0.25–0.75 m soil layer in only one of the experiments. Selenium uptake by the catch crops...
Tipo: Journal paper
Palavras-chave: Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/19588/7/19588.pdf

Sorter med bedre rodvækst til økologisk dyrkning
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian; Andresen, Marianne; Dresbøll, Dorte Bodin.
Resultater fra forsøg med sortsvariation i tidlig rodvækst hos vårhvede, løg og salat. Seks moderne sorter af hver art blev undersøgt, og samlet rodvækst, rodfordeling i jorden og næringsstofoptagelse blev målt. Forsøget viste store sortsforskelle på rodvæksten inden for alle 3 arter.
Tipo: Newspaper or magazine article
Palavras-chave: Composting and manuring Nutrient turnover Breeding; Genetics and propagation.
Ano: 2014
URL: http://orgprints.org/28002/3/28002.pdf

Structural differences in wheat (Triticum aestivum), hemp (Cannabis sativa) and Mischanthus (Mischanthus ogiformis) affect the quality and stability of compost as growing medium
Provedor de dados: 21
Autores: 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

Udbytte, kvalitet og smag i økologisk grønsagsproduktion
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
The article describes the work of the VegQure crop rotation study with vegetable crops, comparing effects of conventional and different types of organic production on yield, field biology, product quality, and environmental effects.
Tipo: Newspaper or magazine article
Palavras-chave: Crop health; Quality; Protection Farm nutrient management Vegetables.
Ano: 2008
URL: http://orgprints.org/14776/1/14776.pdf

Delayed nutrient application affects mineralisation rate during composting of plant residues
Provedor de dados: 21
Autores: 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

Simulating nitrate retention in soils and the effect of catch crop use and rooting pattern under the climatic conditions of Northern Europe
Provedor de dados: 21
Autores: Pedersen, Anders; Thorup-Kristensen, Kristian; Jensen, Lars Stoumann.
This model analysis of catch crop effects on nitrate retention covered three soil texture classes sand, loamy sand, sandy loam) and three precipitation regimes in a temperate climate representative for northern Europe (annual precipitation 709-1026 mm) for a period of 43 years.  Simulations were made with two catch crops (ryegrass and Brassica) with different rooting depths, and soil N effects in the next spring were analysed to 0.25, 0.75 and 2.0 m depth to represent the catch crop effect on following crops with different rooting depths. Nitrate retained without a catch crop was generally located in deeper soil layers. In the low precipitation regime the overall fraction of nitrate retained in the 0-2.0 m soil profile was 0.23 for the sandy soil, 0.69 for...
Tipo: Journal paper
Palavras-chave: Soil; Farm nutrient management; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/16122/1/16122.pdf

Økologisk grønsagssædskifte uden kvælstofimport
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
Artiklen viser resultaterne fra de første 6 år af et økologisk grønsagssædskifte. I sædskiftet dyrkes porrer, hvidkål, løg, gulerødder og ærter, foruden byg og grøngødning. Sædskiftet er et 6-marks skifte, der er gennemført uden import af gødning. Forsyningen af afgrøderne med kvælstof er sikret ved udnyttelse af efterafgrøder og grøngødning samt ved udnyttelse af afgrøder med dyb rodvækst. Resultaterne viser, at vi har kunnet opnå høje udbytter af grønsagerne i sædskiftet, selv af de meget krævende grønsagsarter som hvidkål og porre. En af de vigtigste faktorer har været at holde markerne bevoksede i efteråret, det har klart reduceret nitratindholdet i jorden i efteråret og dermed risikoen for udvaskning, og samtidig klart øget kvælstofindholdet i jorden...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover Vegetables Cereals; Pulses and oilseeds.
Ano: 2002
URL: http://orgprints.org/1128/1/sandefjord.pdf

Rodsystemer hos rødbede, sukkermajs og knoldselleri efter grøngødning
Provedor de dados: 21
Autores: Christiansen, Julie S.; Kristensen, Hanne L.; Thorup-Kristensen, Kristian.
Større viden om grønsagers rodvækst vil kunne øge kvælstofudnyttelsen ved økologisk dyrkning. Derfor er rodsystemerne hos rødbede, sukkermajs og knoldselleri blevet undersøgt ved Danmarks JordbrugsForskning i Årslev.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Soil biology; Farm nutrient management; Air and water emissions.
Ano: 2003
URL: http://orgprints.org/7912/1/7912.doc

Catch Crops in Organic Farming Systems without Livestock Husbandry - Simulations with the DAISY model
Provedor de dados: 21
Autores: 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

Comparing conventional and improved organic vegetable  rotations, yields and nitrogen husbandry
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian; Kristensen, Hanne L.
During 2005 to 2009 three approaches to organic vegetable rotations were compared to a conventional rotation in an interdisciplinary project. The organic rotations differed in their reliance on animal manure vs. cover crops and intercrops, but the rotation of main vegetable and cereal crops were identical in the four rotations. One organic rotation (O1) relied on import of manure for supply of nutrients, in another (O2) cover crops were used to replace most of the manure import, and in (O3) also intercrops were grown to improve natural pest regulation. The yearly import   of nitrogen were on average 149, 94, 28, and 28 kg N.ha-1 in C, O1, O2, and O3 respectively. On average the yield in the O1 system was 83% of the yield in the conventional system. In the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Vegetables.
Ano: 2010
URL: http://orgprints.org/19585/4/19585.pdf

Simulating root growth
Provedor de dados: 21
Autores: Pedersen, Anders; Thorup-Kristensen, Kristian; Kristensen, Hanne Lakkenborg; Berntsen, Jørgen.
Dynamic plant/soil models are used to predict crop production, N dynamics and nitrate leaching loss of different cropping systems. To do this, the models simulate various aspects of plant biology, soil biology and soil physics. Correct simulation of root growth is critical for the simulation of nitrate leaching losses. Measurements have been made on crop root growth on two soil types, and the data used to improve the simulation of root growth within the FASSET model. The paper presents the results from root measurements on winter wheat, spring barley and sugar beets, and the root modelling approach we have developed.
Tipo: Journal paper
Palavras-chave: Soil biology.
Ano: 2004
URL: http://orgprints.org/3879/1/3879.rtf

Hvad bestemmer afgrøders roddybde, og hvordan kan vi bruge det til at opnå bedre udnyttelse af kvælstof?
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
Vores afgrøder og efterafgrøder har meget forskellig roddybde, fra under 50 cm til mere end 250 cm. Vi kan bruge forskellene til at sammensætte sædskifter med lav N udvaskning.
Tipo: Conference paper, poster, etc.
Palavras-chave: Farm nutrient management.
Ano: 2007
URL: http://orgprints.org/11430/1/11430.pdf

Genetisk variation af rødder og rodhår mellem sorter af vårhvede
Provedor de dados: 21
Autores: 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

Cultivar differences in early spatial distribution of wheat, onion and lettuce roots
Provedor de dados: 21
Autores: Andresen, Marianne; Dresbøll, Dorte Bodin; Thorup-Kristensen, Kristian.
Organic plant production is generally dependent on import of plant nutrients from conventional farming 26 systems. With increasing focus on reducing the conventional import, increased nutrient use efficiency is an 27 aim in organic agricultural systems. One way to achieve this is by choosing nutrient efficient cultivars or by 28 breeding for such. It is especially in the plant establishment phase, that an efficient nutrient uptake is 29 important. At this stage, plants have limited root growth and thereby limited soil contact and nutrient 30 uptake. The possibility of the initial roots to exploit as large a volume as possible will therefore increase 31 nutrient uptake. In addition, in early spring nutrient levels in the soil are low as mineralization is...
Tipo: Journal paper
Palavras-chave: Cereals; Pulses and oilseeds Vegetables.
Ano: 2015
URL: http://orgprints.org/28005/9/28005.pdf

Model analysis of environmental relations in a vegetable rotation experiment
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
In a chapter which will be part of the final report from the Subproject 7 of the QLIF project (http://www.qlif.org/), the nitrogen relations of organic and conventional vegetable rotations are analysed using the EU-rotate simulation model. Measured data from the VegQure project are used, where a vegetable based rotation grown either conventionally, or organically using two different set of strategies (manure import v.s. cover crops and green manure).
Tipo: Report chapter
Palavras-chave: Vegetables; Farm nutrient management; Composting and manuring; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/16346/1/16346.pdf

Brug efterafgrøder rigtigt i sædskiftet
Provedor de dados: 21
Autores: 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

Rødder og kompost, økologisk planteproduktion under begrænset næringsstofforsyning
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
Sammendrag af aktiviteter og resultater i Organic RDD projektet: Rødder og kompost, økologisk planteproduktion under begrænset næringsstofforsyning (RoCo).
Tipo: Report chapter
Palavras-chave: "Organics" in general Soil quality Food security; Food quality and human health Cereals; Pulses and oilseeds Composting and manuring Recycling; Balancing and resource management Nutrient turnover Vegetables Breeding; Genetics and propagation Policy environments and social economy.
Ano: 2014
URL: http://orgprints.org/28003/3/28003.pdf

Health biomarkers in a rat model after intake of organically grown carrots
Provedor de dados: 21
Autores: Jensen, Maja M.; Jørgensen, Henry; Halekoh, Ulrich; Watzl, Bernhard; Thorup-Kristensen, Kristian; Lauridsen, Charlotte.
BACKGROUND:  Organic food is perceived as being of better quality and healthier than conventional foods although the scientific research on organic foodstuffs is highly contradictory. The aim of the present study was to investigate if an intake of carrots from four different cultivation systems grown in two consecutive years would influence various biomarkers of health in a rat model. All rats were fed a diet with 40% carrot content. The carrots were grown under conventional (C), “minimalistic” organic (O1), organic (O2), or “very” organic cultivation systems (O3). A control group (CO) being fed standard rat chow was included. RESULTS: The plasma α-tocopherol concentration was higher in the O2 carrot-based diet than in the C carrot based-diet in one year,...
Tipo: Journal paper
Palavras-chave: "Organics" in general Food security; Food quality and human health.
Ano: 2012
URL: http://orgprints.org/19732/10/19732.pdf

Root pruning reduces root competition and increases crop growth in a living mulch cropping system
Provedor de dados: 21
Autores: Båth, Birgitta; Kristensen, Hanne L.; Thorup-Kristensen, Kristian.
In two field experiments, growth of white cabbage in pure stands was compared with that of cabbage grown in living mulch systems to reduce pest attacks. The roots of the living mulch were pruned early in the season, with the aim of reducing competition and increasing growth of the white cabbage. Root pruning was shown to increase the above-ground biomass of white cabbage, with two prunings giving higher cabbage yields than one, but there were clear differences between the living mulch species tested (red clover, birdsfoot trefoil, salad burnet, winter rye). Below-ground growth and competition were examined by measuring root distribution in minirhizotrons and uptake of 15N placed at different soil depths. These studies showed that the ability of mulch...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Vegetables.
Ano: 2008
URL: http://orgprints.org/16319/1/EprintsRootPruning.pdf

Plantedække øger udnyttelsen af N i økologiske grønsager
Provedor de dados: 21
Autores: 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

Geotekstiler som rodspærre
Provedor de dados: 21
Autores: Kristensen, Hanne L.; Thorup-Kristensen, Kristian.
Når man dyrker grøntsager i forurenet jord, er der risiko for, at afgrøderne via rødderne optager forureningsstoffer i uacceptabel grad, så de ikke er egnede til at spise. Ved dybereliggende forurening kan problemet teoretisk set imødegås ved at hindre, at rødderne trænger ned i den forurenede jord. To forsøg har imidlertid vist, at end ikke de tætteste geotekstiler i praksis kan standse rodvæksten af grønsager fuldstændigt. Dog kan nogle geotekstiler begrænse rodudbredelsen markant hos de fleste arter.
Tipo: Report
Palavras-chave: Vegetables.
Ano: 2003
URL: http://orgprints.org/1543/1/geotekstiler.pdf

Cropping systems with winter wheat or spring wheat? Root growth, catch crops, nitrogen leaching and baking quality
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian; Pedersen, Lene.
In organic farming winter wheat is typically grown after good pre-crops, as it pays well for this in terms of yield and quality. However, winter wheat develops slowly during the autumn, and much nitrate may be lost by leaching before spring. System with catch crops followed by spring wheat, or maybe catch crops intercropped with winter wheat could improve the utilization of the pre-crop effects in wheat cropping. In this experiment we studied wheat and catch crop root growth, crop and soil N dynamics, and effects on yield and baking quality in wheat cropping systems with catch crops.  The results showed that the com-bination of catch crops and spring wheat was ideal for resource use, but also that winter wheat had a much deeper root system (c. 2.0 m) than...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2006
URL: http://orgprints.org/7483/1/Paper_for_congress.doc

Gulerod, løg, salat og hvidkål i økologiske sædskifter
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
Artiklen fortæller om udbytte og kvalitet af grønsager dyrket i et konventionelt og 3 økologiske dyrkningssystemer i VegQure projektet.
Tipo: Newspaper or magazine article
Palavras-chave: Vegetables.
Ano: 2009
URL: http://orgprints.org/16322/1/16322.pdf

Baking performance and sensory quality of organic wheat cultivars
Provedor de dados: 21
Autores: 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

Nutrient Management in Organic Farming and Consequences for Direct and Indirect Selection Strategies
Provedor de dados: 21
Autores: Messmer, Monika; Hildermann, Isabell; Thorup-Kristensen, Kristian; Rengel, Zed.
This chapter contains sections titled:   Introduction  Availability of Nutrients in Organic Farming  Roots: The Hidden Potential  Even Greater Complexity: Plant-Microbe-Soil Interactions  Importance of Selection Environments  Breeding Strategies  References
Tipo: Book chapter
Palavras-chave: Soil quality Breeding; Genetics and propagation.
Ano: 2011
URL: http://orgprints.org/21827/1/messmer-etal-2012-OrganicCropBreeding-p15-38.pdf

Nutrient management in organic farming and consequences for direct and indirect selection strategies
Provedor de dados: 21
Autores: Messmer, Monika; Hildermann, Isabell; Thorup-Kristensen, Kristian; Rengel, Zed.
The chapter deal with the fertilization practices in organic farming and how this affect the requirements for optimized crop genotypes for organic farming. Organic farming does not just lead to generally lower nutrient input, also nutrient sources and timing of nutrient availability is different from conventional farming, leading to different conditions for crop growth. This affects the optimal plant characteristics to breed for, and the way breeding should be performed.
Tipo: Book chapter
Palavras-chave: Composting and manuring Soil Breeding; Genetics and propagation.
Ano: 2012
URL: http://orgprints.org/22286/6/22286.pdf

Crop cover improves the nitrogen status in vegetable crop rotations
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
Results from an organic vegetable rotation, and from a number of specific experiments with catch crops, shows that autumn crop cover strongly improves N availability for the succeeding crop. Though many different types of crop cover have been involved, from full year green manures, to short term catch crops and green manures and even white cabbage stubble allowed to continue growth after harvest, they have all had a similar effect on N dynamics in the field. With crops actively growing in the field until the late autumn, much less N is left in the soil, and the risk of leaching loss is strongly reduced. In the subsequent spring, mineralization of N from the crop residues leads to increased N availability for the succeeding crop. This main effect was found...
Tipo: Journal paper
Palavras-chave: Cereals; Pulses and oilseeds Production systems Vegetables.
Ano: 2004
URL: http://orgprints.org/3875/1/3875.doc

Combination of undersown catch crops and row-hoeing for optimizing nitrogen supply and weed control in organic spring barley
Provedor de dados: 21
Autores: 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

Resource efficiency of organic and low input systems in comparison to intensive agriculture
Provedor de dados: 21
Autores: 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

GROWING MEDIA FOR ORGANIC TOMATO PLANTLET PRODUCTION
Provedor de dados: 21
Autores: Nielsen, Kai Lønne; Thorup-Kristensen, Kristian.
The choice of growing media and the strategy of  application of organic fertilizers is considered one of the largest challenges for production of organic tomato plantlets for transplanting. We have measured the growth and the ability of young tomato plantlets to extract plant nutrients from an organic growing media. Plants were grown in 0.45L pots. Plant nutrition were either entirely based on the mineral nutrients, available from the organic growing media or based on a combination of nutrients from the organic growing media and fertigation with water-soluble organic fertilizers during plantlet production. The first results shows that plant dry weigth and uptake of nitrogen, phosphorus and potassium was reduced in the organic growing media compared to the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Breeding; Genetics and propagation Vegetables Composting and manuring.
Ano: 2001
URL: http://orgprints.org/1606/1/KTK06009.pdf

Nitrogen use efficiency in organic and conventional vegetable rotations.: Measured and model simulated results
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
Vegetable cropping systems are prone to high nitrogen (N) leaching losses. Optimizing the management of each crop can reduce this problem, but not solve it. Important improvements in cropping system N efficiency can be obtained by improving the rotation, to make sure that N left by some crops are to a large extent used by the succeeding crops. However, this includes rotation and fertilization planning based on a complex set of information on many crop species, on catch crops and green manure crops and on their interaction with soil and weather conditions. Simulation models can be used in various ways to give specific advice for growers on fertilization. Models can also be used to help growers develop their growing systems by helping them to get a better...
Tipo: Conference paper, poster, etc.
Palavras-chave: Vegetables; Farm nutrient management; Air and water emissions.
Ano: 2008
URL: http://orgprints.org/16318/1/16318.pdf

Rodvækst og sorter til økologi
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
Den tidlige rodvækst er vigtig for afgrødernes etablering i en økologisk dyrket jord med begrænset næringsstoftilgængelighed. Vi har studeret forskelle i tidlig rodvækst imellem sorter af vårhvede, og fundet betydelige forskelle både i samlet rodvækst, og i røddernes fordeling i jorden.
Tipo: Newspaper or magazine article
Palavras-chave: Farming Systems Breeding; Genetics and propagation Farm nutrient management.
Ano: 2013
URL: http://orgprints.org/24732/7/24732.pdf

Net mineralization rate of selenium from plant material and inorganic salts
Provedor de dados: 21
Autores: 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

Roots below one meters depth are important for nitrate uptake by annual crops
Provedor de dados: 21
Autores: Kristensen, Hanne L.; Thorup-Kristensen, Kristian.
The root depths of annual crops vary from 0.2 m to more than 2 m depending on root growth rate and length of growing season. However, studies of root growth and N uptake are often restricted to a depth of 1 m or less, as root biomass is assumed to be negligible below this depth. We have studied the importance of root growth and N uptake to a depth of 2.5 m in fully grown field vegetables and cover crops by use of minirhizotrons and deep point placement of 15N. These data were used for calculation of the potential rate of nitrate uptake below 1 m depth. The rate was found to be significant for the six crops studied. The effect of root depth on soil N left by an annual crop was simulated with the EU-rotate N model. The results showed that deep rooted crops...
Tipo: Book chapter
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Vegetables.
Ano: 2008
URL: http://orgprints.org/11459/1/11459.pdf

Arter af efterafgrøder og deres egnethed til rækkedyrkning
Provedor de dados: 21
Autores: 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

Simulating Root Density Dynamics and Nitrogen Uptake – Can a Simple Approach be Sufficient?
Provedor de dados: 21
Autores: Pedersen, Anders; Zhang, Kefeng; Jensen, Lars Stoumann; Thorup-Kristensen, Kristian.
The modeling of root growth in many plant–soil models is simple and with few possibilities to adapt simulated root proliferation and depth distribution to that actually found with different crop species. 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: Nutrient turnover; Crop combinations and interactions; Root crops; Farm nutrient management; Vegetables.
Ano: 2007
URL: http://orgprints.org/10744/1/10744.pdf

Post-harvest effect of cover crops on creeping thistle Circium arvense
Provedor de dados: 21
Autores: Thi Thuy, Hong Phan; Thorup-Kristensen, Kristian.
Cover crops move nitrogen (N) to the top soil. This enhances the N uptake of the succeeding barley crop, especially at early growth stages, and limits the access of the thistle to the N from the subsoil. The autumn tillage for perennial weed control, in contrast, provides a N distribution favorable for the uptake by thistles rather than barley crop. The evidence of post-harvest effect of cover crops on the N status of C. arvense gives a better understanding of their roles in weed control.
Tipo: Newspaper or magazine article
Palavras-chave: Crop combinations and interactions; Composting and manuring; Nutrient turnover; Weed management.
Ano: 2016
URL: http://orgprints.org/31543/1/Post-harvest%20effect%20of%20cover%20crops%20on%20creeping%20thistle%20Circium%20arvense.pdf

Vegetable quality in a conventional and three organic cropping systems
Provedor de dados: 21
Autores: 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 if conventional and organic cropping systems, which differ clearly in strategies for nutrient and pest management, influence the harvest and sensory quality of the products?    Lettuce and onion were grown in a conventional and three organic vegetable cropping systems with different levels of external inputs and use of cover- and inter-crops for nutrient re-cycling and natural pest management in  the period of 2007-2009 (VegQure project). The crop rotation consisted of 8 fields of vegetables and cereals. Onion was grown after a year of oat and iceberg lettuce after winter rye. There were 3 replicates of each  cropping system each...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Vegetables; Consumer issues.
Ano: 2011
URL: http://orgprints.org/19587/3/19587.pdf

Chicory Grows Roots Below 3 m Is That Beneficial under Water Stress?
Provedor de dados: 21
Autores: 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

Proteomics in the backyard: 2DE based comparison of vegetables grown at conventional farming conditions and organic farming conditions
Provedor de dados: 21
Autores: Nawrocki, Arkadiusz; Thorup-Kristensen, Kristian; Nørregaard Jensen, Ole.
We used 2D electrophoresis and mass spectrometry to compare two organic farming systems with conventional farming of cabbage and carrot. For both vegetable proteomes we observed differential responses that depended on farming conditions. We detected significant protein abundance changes in a series of metabolic processes including glycolysis and protein synthesis. This study provides a framework for detailed molecular analysis of vegetables in large scale field studies and the influence of environmental conditions on plant growth.
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection Vegetables.
Ano: 2008
URL: http://orgprints.org/16363/1/16363.pdf

Undersowing legume crops for green manuring of lettuce
Provedor de dados: 21
Autores: Sørensen, Jørn Nygaard; Thorup-Kristensen, Kristian.
The objective of this experiment was to investigate the potential of several species of undersown legume crops to deplete soil nitrate and to accumulate nitrogen. A further objective was to measure the effects of the legume crops as a green manure for a succeeding early lettuce crop. In two years, different undersown legume crops were compared to a control treatment where no crop was undersown. In November, at the end of their growing season, the legume crops reduced the content of mineral nitrogen in the top 1 m of the soil to one third of what was available when no crop was undersown. The N uptake in shoots and roots was in the range of 100-160 kg ha-1. The legume crops were incorporated at the beginning of April the succeeding year. In May, the content...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2003
URL: http://orgprints.org/1204/2/Biological_Agriculture_and_Horticulture_2003.doc

Simulating nitrate retention in soils and the effect of catch crops use and rooting pattern under the climatic conditions of Northern Europe
Provedor de dados: 21
Autores: Pedersen, Anders; Thorup-Kristensen, Kristian; Jensen, Lars Stoumann.
A model analysis of catch crop effects on nitrate leaching was carried out covering three soil types and three precipitation regimes in temperate climate. Catch crops with varying root properties (barssica and rye grass) were used to analyse the effect on nitrate retention in different soil layers. Climate data was taken from 3 different precipitation regimes over 43 years with an average annual amount of rainfall of 709, 796 and 1026 mm. The three soil types were typical Danish sandy soil, a loamy sand soil and a sandy loam. These soil types cover 65 % of the Danish arable area. Simulations covered a winter season from harvest to 1 May the following year. To illustrate the effect of rooting depth of the succeeding crop soil mineral N content is calculated...
Tipo: Journal paper
Palavras-chave: Farm nutrient management; Denmark.
Ano: 2009
URL: http://orgprints.org/9341/2/9341.pdf

Grønkål optager nitrat fra mere end 2 meters dybde
Provedor de dados: 21
Autores: Kristensen, Hanne L.; Thorup-Kristensen, Kristian.
Grønsager kan efterlade meget nitrat i jorden efter høst. Det skyldes at de fleste grønsager kræver en stor tilførsel af kvælstof for at udvikle sig godt, og samtidig er nogle grønsager dårlige til at udnytte det tilførte kvælstof. Hertil kommer at der ofte efterlades kvælstofrige planterester i marken ved høst. De omsættes hurtigt og mineraliseres til nitrat, der risikerer at blive udvasket og dermed forurene vandmiljøet. Både mijømæssigt og agronomisk er det uhensigtsmæssigt at tabe nitrat fra jordbrugssystemet. Det skulle hellere bruges til at give et godt udbytte af afgrøderne - ikke mindst i økologiske dyrkningssystemer.
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Soil biology; Farm nutrient management; Air and water emissions.
Ano: 2005
URL: http://orgprints.org/7917/1/7917.pdf

Ny lovende efterafgrøde
Provedor de dados: 21
Autores: 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

Betydningen af komposttype for kvaliteten af økologisk hvedebrød
Provedor de dados: 21
Autores: 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

Uptake of 15N labeled nitrate by root systems of sweet corn, carrot and white cabbage from 0.2-2.5 meters depth
Provedor de dados: 21
Autores: Kristensen, Hanne L.; Thorup-Kristensen, Kristian.
Leaching of NO3− from vegetable cropping systems can be very high compared to arable systems. This is a problem for vegetable growers in general as it decreases groundwater quality, and for organic growers in particular as the organic production is often limited by N. In a field experiment, we investigated the N uptake and root growth of three vegetables using minirhizotrons reaching 2.4 m with the purpose to study the relationship between vegetable root distribution and uptake of NO3− from deep soil layers. NO3− uptake was studied over a 6 d period at the end of September by injection of 15 NO3− at four depths in the ranges: 0.2–0.8, 0.6–1.8, and 1–2.5 m under late sweet corn (Zea mays L. convar. Saccharata Koern.), carrot (Daucus carota L.), and autumn...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Soil; Vegetables; Environmental aspects.
Ano: 2004
URL: http://orgprints.org/32023/1/Plant%20and%20Soil%202004.pdf

Enhanced natural regulation of the belowground pest Delia radicum in organic farming systems
Provedor de dados: 21
Autores: Meyling, Nicolai V.; Navntoft, Søren; Philipsen, Holger; Thorup-Kristensen, Kristian; Eilenberg, Jørgen.
Population dynamics of the cabbage root fly Delia radicum in three different organic and one conventional cabbage cropping systems were evaluated over 3 years. Oviposition was reduced over time, but not affected by organic farming practice. Pupal production was reduced in all organic systems compared to the conventional system in all years, but pupal parasitation rates were similar among systems. More predators of fly eggs were present in the organic system O2. Reduced larval survival rates in the organic systems may be result of increased natural enemy activity and plant effects.
Tipo: Journal paper
Palavras-chave: Soil biology; Vegetables; Biodiversity and ecosystem services.
Ano: 2011
URL: http://orgprints.org/19304/4/19304.pdf

A row cropping system with cover crops for balancing weed and soil fertility management in organic cereal production
Provedor de dados: 21
Autores: 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

A model analysis on nitrate leaching under different soil and climate conditions and use of catch crops
Provedor de dados: 21
Autores: 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

Roots below one meters depth are important for nitrate uptake by annual crops
Provedor de dados: 21
Autores: Kristensen, Hanne L.; Thorup-Kristensen, Kristian.
The root depths of annual crops vary from 0.2 m to more than 2 m depending on root growth rate and length of growing season. However, studies of root growth and N uptake are often restricted to a depth of 1 m or less, as root biomass is assumed to be negligible below this depth. We have studied the importance of root growth and N uptake to a depth of 2.5 m in fully grown field vegetables and cover crops by use of minirhizotrons and deep point placement of 15N. Deep rooted crucifereous crops were found to have high root densities to a depth of 1.5-2 m and high 15N uptake to this depth. Uptake was significant near the bottom of the root zone at a depth of 2-2.5 m where root density was low. Here N uptake rates were higher per unit root length compared to...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Vegetables.
Ano: 2006
URL: http://orgprints.org/11462/1/Deep_roots_HLK_FINAL.ppt

Grøngødning og efterafgrøder
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian; Tersbøl, Michael.
Bogen skal være et rådgivningshæfte til landmænd og rådgivere om anvendelse af efterafgrøder og grøngødning i jordbruget. Hæftet rettes både imod økologisk og konventionelt jordbrug. Det omhandler virkningsmekanismer og effekter af efterafgrøder og grøngødning, strategier for anvendelse og konkrete anvisninger på dyrkningsmetoder. Hæftet forventes at udkomme i slutningen af 2004.
Tipo: Other
Palavras-chave: Cereals; Pulses and oilseeds Production systems Vegetables.
Ano: 2005
URL: http://orgprints.org/3888/1/3888.rtf

Modelling root distribution and nitrogen uptake
Provedor de dados: 21
Autores: Pedersen, Anders; Thorup-Kristensen, Kristian.
Plant soil and atmosphere models are commonly used to predict crop yield and environmental  consequence. Such models often include complex modelling modules for water movement,  soil organic matter turnover and, above ground plant growth. However, the root modelling in these models are often very simple, partly due to a limited access to experimental data. We present a two-dimensional model for root growth and proliferation. The model focuses on annual crops, and attempt to model root growth of the crops and its significance for N uptake from different parts of the soil volume.
Tipo: Conference paper, poster, etc.
Palavras-chave: Production systems; Vegetables; Root crops.
Ano: 2004
URL: http://orgprints.org/4634/1/4634.pdf

Effect of winter cover crops versus autumn tillage on Nitrogen uptake of the succeeding cereal crops and creeping thistle Circium arvense
Provedor de dados: 21
Autores: Thi Thuy, Hong Phan; Wacker, Tomke Susanne; Thorup-Kristensen, Kristian.
The effect of cover crops on nitrogen uptake and competition between thistles and a barley crop was studied using 15N labelling of the autumn soil N pool. The effects was followed by soil and plant measurements of 15N enrichment in the following year, in plots where 15N had been added to plots grown with cover crops or plots subjected to autumn tillage
Tipo: Journal paper
Palavras-chave: Production systems Crop combinations and interactions Cereals; Pulses and oilseeds Soil tillage Weed management.
Ano: 2018
URL: http://orgprints.org/33093/1/EXP2-manuscript.Hong-Tomke-K-27.4.2018_ktk.docx

Effect of organic growing systems on sensory quality and chemical composition of tomatoes
Provedor de dados: 21
Autores: 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

Determining deep root activity in arable fields by the core-labelling technique (CLT)
Provedor de dados: 21
Autores: Han, Eusun; Dresbøll, Dorte Bodin; Thorup-Kristensen, Kristian.
Introduction: Deep roots have the potential to exploit plant resources otherwise inaccessible. The aim of this study was to develop a method, the Core-Labelling Technique (CLT), to measure root activity down to 2.5 m of soil depth under field conditions.     Materials and Methods: Two stainless steel ingrowth-cores, 0.1 m in diameter and 0.55 m in length, were filled with soil labelled with nutrient tracers, i.e., LiCO3, CsCO3, Na2SeO4, RbCO3 and 15NH4Cl. The labelled cores were placed into an access-tube having openings at 1.0 m and 2.5 m of soil depth. They were kept under a lucerne (Medicago sativa) crop for 60 days, after which, the root length density (RLD) and concentration of tracers in shoot biomass (including a control) were measured.    Results:...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology; Nutrient turnover; Soil tillage; Farm nutrient management.
Ano: 2018
URL: http://orgprints.org/33942/1/Poster%20-%20Eusun_final.pdf

Nyt projekt om sundhed af økologiske grøntsager
Provedor de dados: 21
Autores: Kidmose, Ulla; Edelenbos, Merete; Christensen, Lars Porskjær; Thorup-Kristensen, Kristian.
Et nyt forskningsprojekt skal klarlægge, om der er forskel på den sundheds- og spisemæssige kvalitet af økologisk og konventionelt dyrkede grøntsager.
Tipo: Newspaper or magazine article
Palavras-chave: Food security; Food quality and human health.
Ano: 2007
URL: http://orgprints.org/14802/1/14802.pdf

Efterafgrøder med mange formål
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
Short article about the use of catch crops for many purposes in organic farming.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Production systems; Soil biology.
Ano: 2003
URL: http://orgprints.org/551/1/efterafgr_klumme.pdf

Simulating root density dynamics and nitrogen uptake in the soil profile – A simple approach
Provedor de dados: 21
Autores: Pedersen, Anders; Zhang, Kefeng; Thorup-Kristensen, Kristian; Jensen, Lars S.
We present a 2-D model for simulation of root density and nitrogen (N) uptake for crops grown in agricultural systems, based on a modification of Gerwitz and Page’s root density calculation. A root system form parameter was used to describe the distribution of root biomass vertically and horizontal in the soil profile. The form parameter can vary from 0 where root density is evenly distributed in the soil profile, to 8 where practically all roots are found near the surface. Additionally, the root model has other components describing root features, such as specific root length, N uptake kinetics.   The root penetration rate and the depth distribution of root density were found to be the most important parameters controlling crop N uptake from deeper soil...
Tipo: Working paper
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Root crops; Farm nutrient management; Vegetables.
Ano: 2007
URL: http://orgprints.org/11361/1/Rodmodel_Artikel_Org_eprint.pdf

RowCrop workshop
Provedor de dados: 21
Autores: Olesen, Jørgen E.; Sørensen, Peter; Thorup-Kristensen, Kristian; Theilgaard, Malene.
Workshop omhandlede rækkedyrkning med udgangspunkt i RowCrop projektet. Der blev givet 4 indlæg og en erfaringer med dyrkningssystemet blev drøftet i blandt workshoppens deltagere.
Tipo: Conference paper, poster, etc.
Palavras-chave: Production systems Cereals; Pulses and oilseeds Air and water emissions Weed management.
Ano: 2017
URL: http://orgprints.org/33057/1/RowCrop_workshop_%C3%B8kokongres_2017.pdf

Genotypic differences in growth, yield and nutrient accumulation of spring wheat cultivars in response to long-term soil fertility regimes
Provedor de dados: 21
Autores: Wang, Yaosheng; Magid, Jakob; Thorup-Kristensen, Kristian; Stoumann Jensen, Lars.
Determining genotypic responses to soil fertility may assist selection of cultivars that can be adapted to varied soil fertility regimes, and such selection under field conditions is still limited. A two-year field experiment was conducted in long-term field trials to investigate wheat genotype effects on early growth, yield and nutrient accumulation as affected by varied long-term soil fertility managements and nitrogen (N) fertilization. Results show that the early growth, grain yield and nutrient accumulation of spring wheat plants were strongly affected by soil fertility managements and genotypes. Early shoot and root biomass of singly grown plants and leaf canopy growth under standard growth density was associated with subsequent grain yield of plants...
Tipo: Journal paper
Palavras-chave: Soil quality Breeding; Genetics and propagation.
Ano: 2016
URL: http://orgprints.org/30702/1/Wang%20et%20al%20Acta%20Agr%20Sca%202016%20copy.pdf

Bedre sædskifter med dybe rødder
Provedor de dados: 21
Autores: 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

Identification of deep-rooting crop species in arable subsoil by the minirhizotron technique
Provedor de dados: 21
Autores: Han, Eusun; Havmøller, Lisa; Dresbøll, Dorte Bodin; Thorup-Kristensen, Kristian.
Our current understanding of the plant deep root system and its relevance for crop production is limited. A field trial was established in order to monitor the root growth of various deep-rooted crops down to 5 m of soil depth with the minirhizotron technique. Root intensity (RI: intersections m-1) and maximum rooting depth (m) of seven different crop species indicate varying degree of root penetration capacity among the tested crops. Overall, within one season over 89 % of RI was concentrated at 0-1.0 m of soil depth. Sugar beet (1.4 m) as an annual crop showed the most rapid root growth rate (10.6 mm day-1). On average the perennials resulted in 0.7 m of maximum rooting depth (5.6 mm day-1), which indicates their potential to establish deep root systems...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop husbandry; Soil.
Ano: 2017
URL: http://orgprints.org/36656/1/360a_OWC17%2520science%2520track%2520proceedings%2520in%2520TR_54_Vol1_box.pdf

Viden om rodvækst er nyttig
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
Artiklen beskriver de meget store forskelle i rodvækst, der findes imellem de plantearter vi dyrker, med fokus på grønsagsafgrøder og efterafgrøder. Roddybde og rodvæksthastighed af de forskellige arter behandles. Den viden, vi har om afgrødernes forskellige rodvækst, kan bruges til at lave sædskifter med en bedre kvælstofudnyttelse og til at undgå kvælstofudvaskning.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Production systems; Vegetables.
Ano: 2002
URL: http://orgprints.org/1125/1/roddybde.pdf

Grønsagssædskifte uden tilførsel af gødning
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
Kort omtale af resultater fra det økologiske grønsagssædskifte i Årslev. Sædskiftet er dyrket uden gødningstilførsel, og der er i artiklen lagt vægt på diskusionen af kvælstofdynamik og på resultater der viser en stor virkning af grøngødning udlagt i korn som derefter kun har efteråret at gro i, i sammenligning med grøngødning der optager en hel dyrkningssæson.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Production systems; Vegetables.
Ano: 2002
URL: http://orgprints.org/1129/1/groensagssaedskifte.pdf

Intercropping systems - Optimising crop protection and reducing competition
Provedor de dados: 21
Autores: Björkman, Maria; Båth, Birgitta; Hambäck, Peter; Rämert, Birgitta; Thorup-Kristensen, Kristian.
In this study the effects of intercropping on the turnip root fly, Delia floralis Fall. (Diptera: Anthomyiidae), was studied in an intercropping system with cabbage (Brassica oleracea) and red clover (Trifolium pratense). Both the effects on egg laying, and the effect of natural enemies was studied. To overcome the problem of competition in the intercropping system, different understorey crops were evaluated with the aim to find species that have a low competitive force on cabbage. The possibility to minimize competition further with root pruning of the understorey species, was also investigated.
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general.
Ano: 2006
URL: http://orgprints.org/7480/1/Abstract_Danmark.doc

Root growth and nitrate uptake of three different catch crops in deep soil layers
Provedor de dados: 21
Autores: Kristensen, Hanne L.; Thorup-Kristensen, Kristian.
Catch crops can reduce NO3 losses from leaching, but little is known about the importance of deep rooting for the efficiency of NO3 depletion. In a field experiment, we investigated the N uptake and root growth of three types of catch crops using minirhizotrons (glass tubes of 70-mm o.d.) reaching 2.4 m. Our purpose was to evaluate minirhizotron methodology and the importance of deep rooting in the ability of catch crops to take up NO3 from deep soil layers. Nitrogen uptake was studied over a 6-d period at the end of October by injection of 15NO3 at four depths in the ranges: 0.4 to 1, 0.5 to 1.4, and 1 to 2.5 m under Italian ryegrass (Lolium multiflorum Lam.), winter rye (Secale cereale L.), and fodder radish (Raphanus sativus L. var. oleiformis Pers.),...
Tipo: Journal paper
Palavras-chave: Production systems Crop combinations and interactions Cereals; Pulses and oilseeds Air and water emissions.
Ano: 2004
URL: http://orgprints.org/32024/1/SSSAJ%202004.pdf

RoCo
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
Rødder og kompost – økologisk dyrkning med begrænset tilgængelighed af næringsstoffer
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring.
Ano: 2011
URL: http://orgprints.org/20068/1/RoCo_Status_2011.pdf

Optimizing a green manure-based row cropping system for organic cereal production
Provedor de dados: 21
Autores: Phan, Hong TT; Thorup-Kristensen, Kristian.
A row cropping system with an increase of row distance to 24 cm increased the growth of undersown cover crops and allowed 1-2 passes of interow hoeing for weed control before sowing cover crops. The three-week delay sowing time was suitable for the growth of legume species. The new system significantly improved both grain yield and grain N content of the succeeding crop compared to the traditional  cropping system.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover; Biodiversity and ecosystem services; Policy environments and social economy; Denmark; Farm nutrient management; Europe.
Ano: 2018
URL: http://orgprints.org/33114/1/IFSA%202018-HONG%20PHAN.pdf

Below- and aboveground abundance and distribution of fungal entomopathogens in experimental conventional and organic cropping systems
Provedor de dados: 21
Autores: 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

Om at vende chikanegræsset til egen fordel
Provedor de dados: 21
Autores: Thorup-Kristensen, Kristian.
Danish environmental regulations require farmers to grow catch crops on their fields. Many farmers have been hostile to this, and seen it only as an extra cost and extra work. The paper deals with the advantages farmers can get from growing catch crops, and how they grow them in the best way. Species choice, rooting depth, winter hardiness, establishment methods are discussed as parameters to use for optimization of the result. It is argued that in many cases growing catch crops is not only to the advantage of the environment, but may also be of advantage to the farmers.
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover Cereals; Pulses and oilseeds Vegetables Composting and manuring.
Ano: 2004
URL: http://orgprints.org/8044/1/8044.pdf

The effect of nutrient supply on the baking quality of organic wheat cultivars
Provedor de dados: 21
Autores: Kidmose, Ulla; Jensen , Sidsel; Mejnertsen, Peter; Jørgensen, Johannes Ravn; Thorup-Kristensen, Kristian.
Six different of cultivars of spring wheat (Triticum aestivum cv.:  Thaifun, Triso, Thasos and Amaretto), Spelt (Triticum spelta cv.) and Emmer (Triticum dicoccum cv.) were cultivated in an organic study using six different organic compost types (two different household waste composts, sewage sludge compost, fruit and vegetable compost and two different renescience compost types) and one control with no manure applied. 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 volume, the sensory quality and instrumental measured hardness were measured on the bread samples. Different compost types resulted in significant differences in the content...
Tipo: Journal paper
Palavras-chave: Food security; Food quality and human health Consumer issues Farm nutrient management Quality and evaluation of inputs.
Ano: 2015
URL: http://orgprints.org/29516/1/Kidmose%20et.%20al.%20Manus%20compost%20RoCo%201.12.15.pdf

The effect of Intercropping on the Deep Root Development and Nutrient Uptake in a Sugar Beet – Chicory Mixture.
Provedor de dados: 21
Autores: 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

Discrimination of conventional and organic white cabbage from a long-term field trial study using untargeted LC-MS-based metabolomics
Provedor de dados: 21
Autores: Mie, Axel; Laursen, Kristian Holst; Aberg, K Magnus; Forshed, Jenny; Lindahl, Anna; Thorup-Kristensen, Kristian; Olsson, Marie; Knuthsen, Pia; Larsen, Erik Huusfeldt; Husted, Søren.
The influence of organic and conventional farming practices on the content of single nutrients in plants is disputed in the scientific literature. Here, large-scale untargeted LC-MS-based metabolomics was used to compare the composition of white cabbage from organic and conventional agriculture, measuring 1,600 compounds. Cabbage was sampled in 2 years from one conventional and two organic farming systems in a rigidly controlled long-term field trial in Denmark. Using Orthogonal Projection to Latent Structures-Discriminant Analysis (OPLS-DA), we found that the production system leaves a significant (p = 0.013) imprint in the white cabbage metabolome that is retained between production years. We externally validated this finding by predicting the production...
Tipo: Journal paper
Palavras-chave: Farming Systems Food security; Food quality and human health Crop husbandry Crop health; Quality; Protection Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/25578/1/Mie%202014%20Discrimination%20of%20conventional%20and%20organic%20white%20cabbage%20froma%20long-term%20field%20trial%20study%20using%20untargeted%20LC-MS-based%20metabolomics.pdf

An organic and environmentally friendly growing system for greenhouse tomatoes
Provedor de dados: 21
Autores: 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

Below- and aboveground abundance and distribution of fungal entomopathogens in experimental conventional and organic cropping systems.
Provedor de dados: 21
Autores: 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

Hvornår kan udtagning af Nmin prøver betale sig?
Provedor de dados: 21
Autores: Pedersen, Anders; Thorup-Kristensen, Kristian.
Brug af Nmin har været kendt i mange år, men har ikke været anvendt ret meget i praksis. Mange grønsagsavlere oplever, at det både er besværligt og dyrt, samtidig med at resultaterne ofte viser, at Nmin er lavt. Med et nyt beslutningsstøtteprogram er det nu  muligt at målrette prøvetagningen bedre.
Tipo: Newspaper or magazine article
Palavras-chave: Crop combinations and interactions; Farm nutrient management.
Ano: 2006
URL: http://orgprints.org/9193/1/9193.pdf