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| Registros recuperados: 10 | |
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| Kristensen, H.L.; Thorup-Kristensen, K.. |
| • Deep roots may be important for uptake of NO3- by annual crops. A field experiment with the deep rooted crop curly kale (Brassica oleracea L. convar. acephala (DC.) Alef. var. sabellica L.) was performed to investigate root distribution and N uptake in deep soil layers. • Root distribution was investigated by use of minirhizotrons and root extractions to 2.4 m depth. The capacity for crop N uptake was studied by deep 15NO3- placement followed by analysis of plant 15N content after 3-30 days. • The atom percent 15N excess (APE) of plant samples was of similar size after uptake of 15N placed at depths in the range of 0.4-2 m. Root colonisation and start of 15N uptake were synchronized in 2.4 m depth. • The deep roots had higher inflow of 15N compared... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover; Soil biology; Farm nutrient management; Air and water emissions. |
| Ano: 2006 |
URL: http://orgprints.org/7918/1/7918.pdf |
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| Tittarelli, Fabio; Kristensen, H.L.; Campanelli, G.; Bavec , F.; von Fragstein, P.; Testani, E.; Robacer , M.; Canali, S.. |
| Living mulch management may have an effect on production of the crop and nutrient competition between the plant species in the field. In this paper, the amount of soil mineral nitrogen (N) available in the top soil during the cauliflower growing cycle and N uptake of the different components of the system were determined in two experimental sites in Italy and Slovenia where two different systems of living mulch management were compared (early sowed, late sowed) with a system with no living mulch. Moreover, nutritional competition of a hybrid and two open pollinated cultivars against weeds and living mulch was evaluated. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions. |
| Ano: 2014 |
URL: http://orgprints.org/23905/1/23905_Tittarelli_MM.pdf |
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| Kristensen, H.L.; Thorup-Kristensen, K.. |
| Information is needed about root growth and N uptake of crops under different soil conditions to increase nitrogen use efficiency in horticultural production. The purpose of this study was to investigate if differences in vertical distribution of soil nitrogen (Ninorg) affected root growth and N uptake of a variety of horticultural crops. Two field experiments were performed each over 2 years with shallow or deep placement of soil Ninorg obtained by management of cover crops. Vegetable crops of leek, potato, Chinese cabbage, beetroot, summer squash and white cabbage reached root depths of 0.5, 0.7, 1.3, 1.9, 1.9 and more than 2.4 m, respectively, at harvest, and showed rates of root depth penetration from 0.2 to 1.5 mm day)1 C)1. Shallow placement of soil... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover; Farm nutrient management. |
| Ano: 2007 |
URL: http://orgprints.org/14749/1/14749.pdf |
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| Båth, B.; Kristensen, H.L.; Thorup-Kristensen, K.. |
| Living mulch systems may decrease pest attacks. However, the below-ground competition from the living mulch may decrease the growth of the cash crop. Here growth of white cabbage in living mulch systems and in pure stands was compared. Root pruning of the living mulch increased the above-ground biomass of white cabbage, with two prunings giving higher cabbage yields than one. 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 species to compete for resources at depth was restricted by pruning. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions. |
| Ano: 2009 |
URL: http://orgprints.org/19583/3/19583.pdf |
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| Båth, B.; Kristensen, H.L.; Thorup-Kristensen, K.. |
| In intercropping systems with a cash crop and a living mulch intercrop, competition between the cash crop and the intercrop (the living mulch) often reduces the yield of the cash crop. This project investigated (1) the influence of root pruning of living mulches on aboveground biomass of white cabbage. Below-ground growth and competition were examined by measuring (2) root distribution in minirhizotrons and (3) uptake of 15N placed at different soil depths. Two field experiments were carried out at the Aarslev Research Centre in Denmark. These studies showed that the ability of mulch species to compete for resources at depth was restricted by pruning. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions. |
| Ano: 2009 |
URL: http://orgprints.org/19584/1/Poster_(2)_rootrap.ppt |
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| Canali, S.; Campanelli, G.; Bavec, F.; von Fragstein, P.; Leteo, F.; Jocop, M.; Kristensen, H.L.. |
| Ecological services may be exploited by use of living mulches in intercropping systems for production of vegetable crops. But may high yields be attained in intercropping systems for production of resource demanding crops such as cauliflower? In the frame of the InterVeg (Core Organic II) project, four field experiments were carried out in IT, SLO, DE and DK in order to study the effect of the living mulch introduction in cauliflower based cropping systems on crop yield and yield quality. The preliminary results, obtained after the first year project, showed yield and produces quality equal to those obtained in the sole cropping system if the system is properly managed (i.e. LM is late sown or its growth is controlled by root pruning). |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions Biodiversity and ecosystem services Crop health; Quality; Protection. |
| Ano: 2014 |
URL: http://orgprints.org/23521/1/23521%20Canali_MM.pdf |
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| Christiansen, J.S.; Thorup-Kristensen, K.; Kristensen, H.L.. |
| Root development in beetroot (Beta vulgaris L. ssp vulgaris var. conditiva Alef.), sweet corn (Zea mays L. convar. Saccharata Koern.) and celeriac (Apium graveolens L. var. rapaceum Gaud.) was followed during two growing seasons with the aim of describing the root systems and nitrogen (N) utilisation of the three vegetables. The crops were grown after incorporation of green manure either in the preceding Autumn or Spring. Beetroot reached a final root depth of 1.55 – 1.8 m. For sweet corn, the final root depths were 0.6 and 0.9 m, and, for celeriac, 0.45 and 0.6 m in the two years, respectively. The simple measure of average root depth reflected the depth to which soil mineral N was depleted over the season by each of the three vegetables. Autumn... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Vegetables. |
| Ano: 2006 |
URL: http://orgprints.org/10135/1/10135.pdf |
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| Registros recuperados: 10 | |
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