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| Registros recuperados: 18 | |
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| Forster, Felix Johannes; Reents, Hans Jürgen; Schmidt, Harald; Hülsbergen, Kurt-Jürgen. |
| In this study, winter wheat yields of organic and conventional farms with and without livestock in two regions in Germany were examined, with the aim of determining yield differences between the farming systems and possible reasons for these differences. Yields were 85% higher on conventional farms, mainly due to higher nitrogen input and the positive effects of chemical plant protection. The farms in North Rhine-Westphalia achieved higher yields than the farms in Bavaria. Climate was the most important factor, as lower temperatures during winter and higher precipitation during summer in Bavaria probably negatively affected yields. Differences in yield between farms with and without livestock could only be observed for conventional farms. The high... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop husbandry. |
| Ano: 2015 |
URL: http://orgprints.org/27024/1/27024_forster.pdf |
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| Reents, Hans Jürgen; Egerer, Johanna; Baresel, Jörg Peter; Herrmann, Andreas. |
| Zusammenfassung Um Empfehlungen für eine Erhöhung des Anteils der Leguminosen in Ökologischen Anbausystemen bei gleichzeitiger Erweiterung des Artenspektrums zu erarbeiten, wurden die Arten Trifolium subterraneum (Erdklee), Trifolium campestre (Feldklee), Medicago orbicularis (Schneckenklee), Medicago minima (Zwergschneckenklee) und Medicago truncatula (Einjährige Luzerne) in Verfahren des Lebendmulches und der Gründüngung untersucht. Besonders interessant für Mischkulturen hat sich der Erdklee erwiesen, für kurzzeitige Gründüngung die Einjährige Luzerne. Die enge Abfolge von Leguminosen birgt die Gefahr der Unverträglichkeit durch Nematodenbefall speziell mit Meloidogyne und Paratylenchus. In einem Gefäßversuch zeigte sich, dass die Arten der Gattungen... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Crop combinations and interactions. |
| Ano: 2009 |
URL: http://orgprints.org/16214/1/Reents_et_al_2009_Leguminosen_Nematoden.pdf |
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| Reents, Hans Jürgen; Stollovsky, Moritz; Brandhuber, Robert; Erez, Benny; Kainz, Max. |
| In a field experiment with five different main crop rotations and fives subtypes for organic biogas systems, aggregate stability, organic carbon, total nitrogen and pH were evaluated in the topsoil layer (0-5 cm) in April 2010 in a winter wheat stand. Aggregate stability reacted on variation of crop rotation but not on manuring with biogas slurry. Rotations with a higher percentage of legumes led to a higher aggregate stability. Nitrogen reacted in a similar way while organic carbon and pH were more influence by soil inhomogeneity. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality; Crop combinations and interactions. |
| Ano: 2011 |
URL: http://orgprints.org/17521/3/Reents_17521.pdf |
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| Simon, A.; Levin, Kain; Cyffka, L-S; Simon, R.; Reents, Hans Jürgen; Hülsbergen, Kurt-Jürgen. |
| Biogas digestate is a by-product of the biogas process and contains high amounts of nitrogen, which makes it a valuable organic fertiliser. In a field trial near Freising, different crop rotations for biogas production were established in 2004/05 and fertilised with digestate only or were not fertilised (controls). A wide range of methods for soil analysis was used between 2013 and 2015 to identify the methods capable of showing a biogas digestate effect on soil quality. We learned that aggregate stability, C and N contents, and the number of earthworms showed significant differences between fertilised and unfertilised plots, while pH, water infiltration, bulk density and pore size distribution were not able to show biogas effects. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil biology; Nutrient turnover. |
| Ano: 2017 |
URL: http://orgprints.org/31560/1/Untersuchung%20der%20Auswirkungen%20von%20%C3%B6kologisch%20erzeugten.pdf |
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| Reents, Hans Jürgen; Stollovsky, Moritz; Forster, Felix; Lang, Toni; Bauer, Simon; Brandhuber, Robert; Beck, Robert. |
| In a field experiment with five different main crop rotations and fives subtypes for organic biogas systems, aggregate stability, organic carbon, total nitrogen and catalase were evaluated in the topsoil layer in spring 2010, 2011 and 2013 in a winter wheat stand. Aggregate stability was enhanced by variation of crop rotation but not on manuring with biogas slurry. Rotations with a higher percentage of legumes led to a higher aggregate stability. On the other hand catalase activity was improved by biogas slurry. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality Crop combinations and interactions Cereals; Pulses and oilseeds Soil. |
| Ano: 2015 |
URL: http://orgprints.org/26906/2/26906_reents_pflanze_korr_red.pdf |
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| Heuwinkel, Hauke; Stauss, Dominik; Reents, Hans Jürgen; Wiggert, Markus; Plagge, Jan; Hülsbergen, Kurt-Jürgen. |
| Die Kritik an der bisherigen Forschungspraxis war Ausgangspunkt für die Suche nach neuen Lösungsansätzen, die die Grundsätze und Praxis des ökologischen Landbaus wieder stärker in den Fordergrund rücken sollen. Die Grundidee besteht darin, die Betriebe als Ganzes in den Mittelpunkt zu stellen und sie als Systeme zu untersuchen. Der Untersuchungszeitraum muss ausreichend lang sein, damit sich Systemveränderungen in entsprechenden Beobachtungsparametern abbilden. In dieser Machbarkeitsstudie wurde untersucht, wie sich ein solcher Forschungsansatz in Zielsetzung und Organisation umsetzen lässt. Die Diskussion mit potenziellen Kooperationspartnern in vier Regional-Workshops in Deutschland und einem Abschlusstreffen führte zu dem Konzept, ein Netzwerk von... |
| Tipo: Report |
Palavras-chave: Education; Extension and communication Farm economics. |
| Ano: 2006 |
URL: http://orgprints.org/15927/1/15927%2D05OE020%2Dbiolandberatung%2Dwzwtum%2D2006%2Dreents%2Dmachbarkeitsstudie.pdf |
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| Baresel, Jörg Peter; Backes, Gunter; Bülow, L.; Finckh, Maria R.; Frese, L.; Knapp, Samuel; Möller, Detlev; Reents, Hans Jürgen; Siegmeier, Torsten; Simon, R.; Weedon, Odette. |
| Increasing yield instability due to climate change could be mitigated by higher interand intra crop diversity. During the course of the INSUSFAR project, several questions regarding the impact of more diverse crops on agricultural systems are adressed. To answer these questions, varieties, mixtures, and composite cross populations of wheat will be investigated in field experiments and on-farm. Based on the results, the socio-economic, ecological and yield performance of these varieties and the extent of genetic changes in genetically diverse populations will be tested. In addition, effects of plant breeding on the adaption of varieties to different input levels will be analysed. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation. |
| Ano: 2017 |
URL: http://orgprints.org/31618/1/Innovative%20Approaches%20to%20Optimize%20Genetic%20Diversity%20for.pdf |
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| Reents, Hans Jürgen; Levin, Kain. |
| The effects of Biochar and combinations with organic manures on plant biomass and soil properties were tested in a lab experiment with two different soils. Highest applications (10%) of Biochar alone implicated a plant growth decrease while the manure combinations increased biomass, especially in the Luvisol. This positive reaction was not detected in the Regosol during the experiment. Increasing rates of the different amendments decreased soil bulk density, especially in the Luvisol. Manures increased soil respiration, Biochar had nearly no effect. In order to improve soil fertility, combining Biochar with organic N-fertiliser is recommended. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality; Soil. |
| Ano: 2013 |
URL: http://orgprints.org/21375/7/21375_reents.pdf |
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| Reents, Hans Jürgen; Weh, Florian; Fuchs, Alexander. |
| In field experiments in five Bavarian farms three cultivation systems of onion produc-tion were compared: direct sowing, planting of set onions and planting of seedlings with 7 seeds per each tray. In three of five farms the onions yield up to more than 500 dt ha-1and in average the planted seedling yielded higher than the sown ones. In the other farms, where the set onions where included in the trials, the yields were lower depending on the high and early infection with downy mildew. The plant density (90-70 plant m-2) had more effect on the onion size distribution than on the total yield. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Vegetables. |
| Ano: 2007 |
URL: http://orgprints.org/9491/1/9491_Reents_Vortrag.pdf |
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| Baresel, Jörg Peter; Reents, Hans Jürgen. |
| Lebendmulchsysteme im Getreideanbau stoßen in Deutschland seit einigen Jahren auf steigendes Interesse, zeigten sich aber wegen der starken Konkurrenz des als Bodenbedecker verwendeten Weißklees als schwer durchführbar. Einjährige Leguminosen sind wegen ihres kurzen, determinierten Vegetationszyklus potentiell besser geeignet, sie können durch Selbstaussaat mehrjährige Bestände bilden. In diesem Projekt wurden anhand einiger typischer Arten die Eignung einjähriger Leguminosen als Lebendmulche im Getreideanbau geprüft, die Anbausysteme für Lebendmulche weiterentwickelt sowie ihre Wirkung auf die Bodeneigenschaften und die Stickstoffversorgung untersucht. Hierzu wurden über einen Zeitraum von 2 ½ Jahren insgesamt 11 Feldversuche angelegt, in denen Getreide... |
| Tipo: Report |
Palavras-chave: Cereals; Pulses and oilseeds Crop combinations and interactions. |
| Ano: 2006 |
URL: http://orgprints.org/15762/1/15762%2D03OE099%2Dtum%2Dreents%2D2006%2Dlebendmulchsysteme.pdf |
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| Registros recuperados: 18 | |
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