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| Registros recuperados: 62 | |
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| Bellostas, Natalia; Hauggaard-Nielsen, Henrik; Andersen, Mette Klindt; Jensen, Erik Steen. |
| Intercropping, the practical application of ecological principles such as diversity, interference, competition and coexistence in agriculture, is gaining increasing interest in organic farming. To be able to improve the management of intercrops, a more detailed knowledge is required on aspects of interference between crops. A bioassay and a pot experiment were conducted to assess both the mechanisms and the time of expression of processes involved in the early interference between pea (Pisum sativum L.), barley (Hordeum vulgare L.) and oilseed rape (Brassica napus L.) when grown as intercrops. Conditions of non-limiting nutrient and water supply were chosen to eliminate competition for these growth factors. The bioassay gave no indication of competitive... |
| Tipo: Journal paper |
Palavras-chave: Crop combinations and interactions. |
| Ano: 2003 |
URL: http://orgprints.org/1450/2/1450.pdf |
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| Jensen, Erik Steen; Hauggaard-Nielsen, Henrik; Peoples, Mark B.; Gresshoff, Peter M.; Vance, Carroll P.. |
| The vision of a more “bio-based economy” will mitigate global climate change by substituting fossil resources for energy and industrial raw materials by sustainable biomass resources, potentially refined to high value chemicals, materials and fuels in biorefinery concepts. Legume-based cropping systems can play a significant role for such paradigm shift, also when taking into account a potential adoption of less meat-intensive diets. The aim of this review is to evaluate the current knowledge and potential of legume use for agro-energy and other non-food purposes. Legumes contribute protein rich food and feed but also many other interesting compounds, which can be refined for pharmaceuticals, surfactants or food additives (e.g. saponins, isoflavonoids,... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Environmental aspects; Farm nutrient management. |
| Ano: 2010 |
URL: http://orgprints.org/18948/2/18948.pdf |
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| Johansen, Anders; Carter, Mette S.; Jensen, Erik Steen; Hauggaard-Nielsen, Henrik; Ambus, Per. |
| Soil from the Højbakkegård experimental (BioConcens) field was amended with nothing (control), each of two anaerobic digested (AD) materials (mixture of AD cattle manure and maize, mixture of AD cattle manure and cut off grass-clover material), raw cattle manure, and grass-clover in five individual treat-ments. The materials were incorporated homogeneously into the soil and sampled destructively at 0, 1, 3 and 9 days after incorporation. Besides, experiments were performed to follow the turnover of these materials, measured as accumulated respiration over a longer period. Measures included available organic soil carbon (cold- and hot-water extractable), soil mineral nitrogen concentration, soil pH, accumulated respiration over a two-week period, emission... |
| Tipo: Journal paper |
Palavras-chave: Soil quality; Nutrient turnover; Air and water emissions; Biodiversity and ecosystem services; Farm nutrient management. |
| Ano: 2011 |
URL: http://orgprints.org/18894/7/18894.pdf |
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| Johansen, Anders; Stevenson, Bryan; Hauggaard-Nielsen, Henrik; Jensen, Erik Steen. |
| Regarding the use of residual material from bioethanol conversion, a series of experiments were performed. The work included two NZ soils from organic farming systems (Templeton and Ballantray, respectively) and treatments with three types of biomaterials: 1) residual material from bio-ethanol conversion (based on rye straw; 2) untreated rye straw; 3) grass-clover mixture - as well as a control with no amendment. The dried and ground biomaterials were supplied at 2 and 10 mg kg-1 dry soil, incubated in 1-L glass vials and harvested destructively after 3, 5 and 21 days. In this way, four experimental series were performed, each with three sequential harvests. The soil was analyzed for various microbial parameters: bacterial colony-forming units (not in all... |
| Tipo: Newspaper or magazine article |
Palavras-chave: Soil quality; Nutrient turnover; Farm nutrient management. |
| Ano: 2011 |
URL: http://orgprints.org/16901/4/16901.pdf |
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| Jensen, Erik Steen; Peoples, Mark B.; Hauggaard-Nielsen, Henrik. |
| The grain legume/pulse faba bean (Vicia faba L.) is grown world-wide as protein source for food and feed and simultaneously faba bean offers ecosystem services such as N2 fixation and diversification of cropping systems. Even though the global average grain yield has almost doubled during the recent 50 years the area of faba beans has declined with 56% in the same period. This is especially the case for some of the former big producer countries such as China and Egypt. The yield season-to-season of faba bean and development of an industrialized agriculture based on fossil fuels (= N fertilizers, heavy mechanization) are some of the explanations for this development. Studies of faba bean in cropping systems have focussed on the effect of faba bean as a... |
| Tipo: Journal paper |
Palavras-chave: Crop combinations and interactions Cereals; Pulses and oilseeds Farm nutrient management. |
| Ano: 2010 |
URL: http://orgprints.org/18982/4/18982.pdf |
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| Høgh-Jensen, Henning; Loges, Ralf; Jensen, Erik Steen; Jørgensen, Finn V.; Vinther, Finn P.. |
| Symbiotically fixed N2 (SNF) is an important input of nitrogen (N) in many cropping systems. In spite of this fact, the input of fixed N to a particular cropping system is usually not known, and an exact estimation of the amount of N2 fixed requires laborious measurements. Consequently, there is a demand for a simple and reliable tool to estimate N2 fixation in leguminous crops. A model is here proposed for quantification of SNF in leguminous crops in different arable systems. The model estimates SNF using dry matter yield as input and cropping system specific values for the parameters: N concentration in dry matter and the proportion of the N in the legume that is derived from the atmosphere. Further, the model includes fixed N not included in the... |
| Tipo: Journal paper |
Palavras-chave: Production systems. |
| Ano: 2003 |
URL: http://orgprints.org/316/1/Emperical_N2%2Dfixation_eng_v6.doc |
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| Hauggaard-Nielsen, Henrik; Jensen, Erik Steen. |
| Grain legumes benefit the farming system via symbiotic N2 fixation and subsequent residue incorporation contributing to soil fertility together with their effect as break-crop in cereal rich rotations. However, grain legumes are weak competitors towards weeds and consequently weeds constitute a major problem. Since the European policies for reducing the negative effects of agricultural plant production on the environment point to reductions in pesticide use (Mortensen et al., 2000), there is a requirement to further develop strategies to reduce weeds. Intercropping involves the simultaneous growing of several plant species in the same field and the cropping strategy is known to involve interspecific interferences increasing the use of plant growth... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions. |
| Ano: 2004 |
URL: http://orgprints.org/21707/1/21707.pdf |
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| Johansen, Anders; Carter, Mette S.; Jensen, Erik Steen; Hauggaard-Nielsen, Henrik; Ambus, Per. |
| Anaerobic digestion of animal manure and crop residues may be employed to produce biogas as a climate-neutral source of energy to provide fertilizers which allow recycling of plant nutrients on the farm. However, compared to fertilizing with the pristine input materials (e.g. raw animal slurry or plant residues), the effect on soil microbiota and soil fertility may be impacted due to the increased content of mineral nitrogen (N) and decreased amount of organic carbon (C); an issue of concern in especially organic farming systems. An incubation study was performed where 1) water, 2) raw cattle slurry, 3) anaerobically digested cattle slurry + maize, 4) anaerobically digested cattle slurry + grass-clover, or 5) fresh grass-clover was applied to soil at... |
| Tipo: Journal paper |
Palavras-chave: Soil quality; Nutrient turnover; Air and water emissions; Biodiversity and ecosystem services; Farm nutrient management. |
| Ano: 2011 |
URL: http://orgprints.org/20446/4/20446.pdf |
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| Hauggaard-Nielsen, Henrik; Jensen, Erik Steen. |
| Facilitation takes place when plants ameliorate the environment of their neighbours, and increase their growth and survival. Facilitation occurs in natural ecosystems as well as in agroecosystems. We discuss examples of facilitative root interactions in intercropped agroecosystems; including nitrogen transfer between legumes and non-leguminous plants, exploitation of the soil via mycorrhizal fungi and soil-plant processes which alter the mobilisation of plant growth resources such as through exudation of amino acids, extra-cellular enzymes, acidification, competition-induced modification of root architecture, exudation of growth stimulating substances, and biofumigation. Facilitative root interactions are most likely to be of importance in nutrient poor... |
| Tipo: Journal paper |
Palavras-chave: Crop combinations and interactions. |
| Ano: 2005 |
URL: http://orgprints.org/4054/1/4054.pdf |
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| Knudsen, Marie Trydeman; Hauggaard-Nielsen, Henrik; Jensen, Erik Steen. |
| I dag udnytter flere og flere økologiske landmænd fordelene ved samdyrkning af bælgsæd og korn. Fordelene er mere stabile udbytter, mindre ukrudtstryk og lejesæd samt forbedret produktkvalitet for eksempel i form af mindre ærtesyge og højere proteinindhold i kornet. Der er dog stadig et væsentligst problem, nemlig at blandingspartier på nuværende tidspunkt ikke er en accepteret handelsvare. Det er problematisk, hvis ikke man selv har husdyr eller kan afsætte høsten direkte til en landmand, der kan fodre med blandingen. I dag er det oftest nødvendigt at lade korn- og foderstoffirmaet adskille blandingen mod betaling. Denne meromkostning er mange landmænd trætte af. Udbyttegevinsten, der opnås i blandingerne, forsvinder til disse ekstra omkostninger. |
| Tipo: Newspaper or magazine article |
Palavras-chave: Crop husbandry. |
| Ano: 2003 |
URL: http://orgprints.org/1352/2/Andres_Lassen.pdf |
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| Registros recuperados: 62 | |
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