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| Registros recuperados: 36 | |
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| Jørgensen, K.F.; Kjeldsen, A.M.; Askegaard, M.. |
| Toasting field beans can improve the protein quality of field beans markedly. In the feed demonstrations carried out in Project EcoProtein testing a new method of toasting with a drum dryer, showed, however, only reduced effect on the protein quality due to a lower than optimal temperature. The toasted field beans were fed in two organic dairy herds, replacing a part of the concentrates in the ration in a cross-over design. Preliminary results showed no milk yield difference in herd 1, but a reduced milk yield level in herd 2. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Dairy cattle; Farm economics; Feeding and growth. |
| Ano: 2013 |
URL: http://orgprints.org/24572/1/24572.pdf |
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| Eriksen, J.; Søegaard, K.; Askegaard, M.. |
| The residual effect of cutting and grazing during the growing season was investigated in the spring and summer growth in an organic crop rotation with 1-4 year-old grass-clover mixtures of white clover (Trifolium repens L.) and perennial ryegrass (Lolium perenne L.) either with or without red clover (Trifolium pratense L.) and with and without slurry. The white clover mixtures had significantly higher yields in spring and summer in swards that were previously grazed compared to previously cut swards, when slurry was applied. The percentage of white clover in spring was considerably reduced by previous grazing and this caused the yield response of slurry application to be highest following grazing. A similar effect on the clover content was not found in the... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions; Crop husbandry. |
| Ano: 2010 |
URL: http://orgprints.org/17877/4/17877.pdf |
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| Eriksen, J.; Askegaard, M.; Søegaard, K.. |
| Increasing size of organic dairy farms makes grazing of all cropped land inexpedient due to long distance to the milking facilities. We investigated nutrient dynamics and feed production in two dairy crop rotations with differences in proportion of grazing and cutting. One six year crop rotation represents close to the farm buildings (barley undersown with grass-clover - 4 years of grass-clover - spring barley/catch crop) and another represents further away (barley undersown with grass-clover, 2 years of grass-clover -barley/catch crop - maize/catch crop - lupin/catch crop). In each of the crop rotations was made five treatments concerning grazing/cutting strategy and manure application. Results shows that herbage production was high in year 1-4 of... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Farm nutrient management; Air and water emissions. |
| Ano: 2009 |
URL: http://orgprints.org/16291/1/16291.pdf |
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| Madsen, H.K.; Bertelsen, I.; Askegaard, M.. |
| Post-harvest sown catch crops should be sown as early as possible in order to obtain maximum biomass and nutrient uptake in the harvested crop, as biomass production decreased by 2-3.5 percent per day, when time of sowing was postponed throughout August. Furthermore, the winter hardy species included in these experiments had a tendency to yield less than the non-winter hardy catch crops. These experiments imply that early sown catch crops may become a biomass supplement for organic biogas production, provided sufficient yields are obtained and costs for harvest, transportation and storage are adequately low. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farm nutrient management; Post harvest management and techniques. |
| Ano: 2013 |
URL: http://orgprints.org/24554/1/24554.pdf |
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| Eriksen, J.; Thorup-Kristensen, K.; Askegaard, M.. |
| Catch crops might reduce sulphate leaching and thereby increase the overall S use efficiency in crop rotations. At 2 experimental sites in Denmark (a sandy loam and a coarse sand) S uptake of catch crop species was measured. Furthermore net release of S following incorporation of this material (S contents 0.13-1.03%, C:S ratios of 40-329 and lignin content of 1-10.8%) was investigated in a pot experiment with spring barley in sandy soil. The catch crops showed huge differences in their ability to sequester S. The best catch crops (legumes on sandy loam), sequestered 10-12 kg S ha-1 and the poorest catch crops (ryegrass and sorrel on coarse sand), sequestered less than 3 kg S ha-1. The S mineralisation rates were highest for crucifers (57-85% of total S... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover. |
| Ano: 2004 |
URL: http://orgprints.org/3173/1/3173.pdf |
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| Askegaard, M.; Thomsen, I.K.; Berntsen, J.; Hovmøller, M.S.; Kristensen, K.. |
| In order to obtain a high and stable yield of organic spring barley, production should be optimized according to the specific environment. To test the performance of spring barley varieties under varying cropping conditions, a field experiment was carried out in 2003 and 2004 in a six-field mixed organic crop rotation. We investigated the choice of variety, the order in a rotation,and the application of manure (slurry and farm yard manure; 0 to 120 total-Nha�1) on grain yields of six selected varieties with different characteristics grown in either pure stands or in two spring barley mixtures, each consisting of three varieties. Average grain yield of the barley varieties varied between 3.3 t DM ha-�1 and 4.1 t DM ha-�1. Grain yields of the two... |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds. |
| Ano: 2011 |
URL: http://orgprints.org/7853/2/7853.pdf |
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| Eriksen, J.; Askegaard, M.; Søegaard, K.. |
| Increasing plant diversity in grasslands may improve productivity and yield stability. This study investigates in a field experiment, yield and quality of two-species swards of ryegrass/white clover and three-species swards of ryegrass/white and red clover at five different managements representing cutting, grazing, combinations of cutting and grazing and different fertilizer treatments in 1 to 4-yr-old swards. Generally, the three-species mixture produced higher yields than the two-species mixture when swards were young and lower yields when swards were 3 and 4 years old. Fertilizer responses were similar in both mixtures and also rather independent of sward age. The overall mean annual yield increase by slurry application was 1.34 t DM corresponding to... |
| Tipo: Journal paper |
Palavras-chave: Crop combinations and interactions; Farm nutrient management. |
| Ano: 2012 |
URL: http://orgprints.org/20636/7/20636.pdf |
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| Eriksen, J.; Søegaard, K.; Askegaard, M.; Hansen, E.M.; Rasmussen, J.. |
| Dairy production systems in Europe are to a large extent based on ley-arable rotations. In the ley phase of such rotations nitrogen accumulation occurs as a result of (1) organic carbon accumulation in soil not disturbed by tillage operations and (2) a considerable nitrogen surplus in grasslands, particularly under grazing regimes where a large part of the N in ingested grass is recycled to soil via urine and faeces. The accumulation of N and C in grasslands starts soon after establishment, the rate asymptotically declining with age and depends on practices such as fertiliser level, animal feed composition, stocking density, length of grazing and the botanical composition of the sward. In these pasture systems, key perennial legumes are white clover... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Air and water emissions. |
| Ano: 2010 |
URL: http://orgprints.org/17881/4/17881.pdf |
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| Rasmussen, I.A.; Askegaard, M.; Olesen, J.E.; Kristensen, K.. |
| We investigated the effects on annual weeds of location, weed control, manure application and catch crops and their interactions in a crop rotation with cereals and pulses for grain during conversion to organic farming in order to better understand the combined effects of management. An experiment with a four-year crop rotation (spring barley/undersown ley, grass-clover, winter wheat, pea/barley) was carried out from 1997 to 2000 under organic conditions at three locations in Denmark with four treatments: with and without catch crop, and with and without manure. Mechanical weed control was reduced or absent in cereals or pulses with undersown catch crops or grass-clover. Manure application increased weed biomass, but not the proportion of total biomass... |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Crop combinations and interactions Weed management. |
| Ano: 2006 |
URL: http://orgprints.org/7904/1/7904.pdf |
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| Rasmussen, I.A.; Askegaard, M.; Olesen, J.E.. |
| A crop rotation experiment was established in 1997 at three locations representing different soil types and climates. Three factors were tested: crop rotation, catch crop and manure. Catch crop reduced nitrate leaching, but prohibited stubble cultivation. The use of catch crops resulted in increased levels of perennial weeds (E. repens) at one location, while at another; the level of C. arvense was not affected by catch crops, when compared with the use of stubble cultivation. Management of perennial weeds should include considerations of where in a crop rotation to use stubble cultivation, and this should preferably not be after a pulse crop. Catch crops are a more profitable way to manage C. arvense than stubble cultivations. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds Crop combinations and interactions Weed management. |
| Ano: 2005 |
URL: http://orgprints.org/6070/1/6070a.pdf |
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| Eriksen, J.; Askegaard, M.; Søegaard, K.. |
| A key point in designing grass-arable rotations is to find the right balance between number of cultivations versus the length of the grass phase. In a field experiment, we investigated the effect of cropping history (grazed grass-clover and ryegrass, proportion of grassland and previous fertilizer use) on crop growth and nitrate leaching in two years following grassland cultivation. In the final year, the effect of perennial ryegrass as a catch crop was investigated. The nitrogen fertiliser replacement value (NFRV) of grassland cultivation was higher at 132 kg N ha-1 in the rotation with 75% grassland compared to on average 111 kg N ha-1 in rotations with 25 and 38% grassland and the NFRV of ryegrass in the rotation was higher than that of grass-clover.... |
| Tipo: Journal paper |
Palavras-chave: Farm nutrient management; Air and water emissions. |
| Ano: 2008 |
URL: http://orgprints.org/16282/1/16282.pdf |
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| Søegaard, K.; Eriksen, J.; Askegaard, M.. |
| Herbs are established in many organic grasslands due to expected beneficially properties of nutritive value and biodiversity. However, knowledge about grassland herbs is limited. Three mixtures were therefore established at different grazing/cutting management and slurry application. The competitiveness of the species varied very much. Plantain (Plantago lanceolata) and lucerne (Medicargo sativa) competed best under cutting, opposite chicory (Cichorium intybus) that competed best under grazing. Caraway (Carum carvi), burnet (Poterium sanguisorba) and lotus (Lotus coniculatus) had a relative low competitiveness. Slurry application did not affect the proportion of non-leguminous herbs. The nutritive value differed very much. Caraway had the highest and... |
| Tipo: Journal paper |
Palavras-chave: Pasture and forage crops. |
| Ano: 2012 |
URL: http://orgprints.org/20624/4/20624.pdf |
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| Eriksen, J.; Olesen, J.E.; Askegaard, M.. |
| Sulphate leaching may reduce the long-term possibility of maintaining the sulphur (S) supply of crops in low input farming systems. Sulphate leaching and S balances were investigated in an organic cereal crop rotation with barley (Hordeum vulgare), grass-clover (Lolium perenne/Trifolium repens and pratense), winter wheat (Triticum aestivum) and barley/pea (Pisum sativum) in mixture at three sites during the first 3 years after conversion to organic farming. Sulphate leaching decreased significantly during the 3 years, and the concentration of drainage water was lowered 1.85.5 times in the third year. Similarly, the S-content of the crops decreased significantly over the years, reflecting lower soil S availability. Sulphur application to spring barley at... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover. |
| Ano: 2002 |
URL: http://orgprints.org/159/1/S_paper.pdf |
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| Registros recuperados: 36 | |
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