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| Registros recuperados: 34 | |
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| Dannehl, Theresa; Brock, Christopher; Leithold, Günter. |
| Stroh und Gründüngung stellen im Marktfruchtanbau die wesentlichen Substrate für die Versorgung der Böden mit organischer Substanz dar. Weitere organische Dünger sind zumeist nicht oder nur in geringem Umfang vorhanden. Diese Situation erfordert eine differenzierte Bewertung der Humusreproduktionsleistung von Stroh und Gründüngung. Im Rahmen des BÖLN-Projektes „Sicherung der Humusvorräte mit Grün- und Strohdüngung“ (2811NA061) wird u.a. geprüft, inwiefern die kombinierte Betrachtung der C- und N-Massenbilanzen eine anwendbare Option hierfür darstellt. Die Hypothese ist, dass sich das CN-Verhältnis im Substrat-Boden-Gemisch mittelfristig stets wieder einem standortspezifischen Wert annähert. Die Stabilisierung von Substrat-C im Boden wäre somit (u.a.) von... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Soil. |
| Ano: 2015 |
URL: http://orgprints.org/27223/1/27223_dannehl.pdf |
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| Brock, Christopher. |
| Impulsreferate: - Wilfried Denker, Landwirt - Helmut Frank, Bioland, Augsburg - Thomas Schindler Landesbetrieb Landwirtschaft Hessen - Dr. Andreas Gattinger, FiIBL, Frick, Schweiz - Dr. Christian Bruns, Universität Kassel/Witzenhausen - Dr. Christopher Brock, Universität Giessen Ökolandbau kann Humus aufbauen - allerdings ist dies kein automatischer Mitnahmeeffekt, sondern erfordert ein aktives Humusmanagement. Forschungs- und Entwicklungsbedarf besteht insbesondere bei pflanzenbaulich machbaren Systemen mit ausreichender Versorgung mit organischer Substanz im Hackfrucht-/Gemüsebau. Betriebe sollten Humusbilanzen für ihre Flächen erstellen, um die eigene Humuswirtschaft zumindest grob einschätzen zu können. Zur Unterstützung der Betriebe sollte... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality; Soil biology; Composting and manuring. |
| Ano: 2013 |
URL: http://orgprints.org/24797/1/WS%20WITA%202013%20Humus.pdf |
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| Schulz, Franz; Brock, Christopher; Leithold, Günter. |
| Auf dem Lehr- und Versuchsbetrieb für Ökologischen Landbau der Universität Gießen, Gladbacherhof, wird seit 1998 ein zweifaktorieller Dauerfeldversuch durchgeführt. Es werden die Effekt von 3 verschiedenen Betriebssystemen (mit und ohne Viehhaltung) in Kombination mit 4 Bodenbearbeitungsvarianten auf Pflanzen, Boden und Umwelt untersucht. In diesem Beitrag werden die Ergebnisse der Beikraut-Deckungsgrade und des Artenspektrums präsentiert. Zusammenfassend kann festgehalten werden, dass die Deckungsgrade, verglichen mit konventionellen Schadschwellen, generell relativ niedrig waren und nur ein begrenztes Artenspektrum der Ackerbegleitflora gefunden wurde. Aufgrund der intensiven mechanischen Maßnahmen zur Beikrautregulierung hatten die Wildpflanzen keinen... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Biodiversity and ecosystem services. |
| Ano: 2015 |
URL: http://orgprints.org/27153/1/27153_schulz.pdf |
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| Hillebrecht, Björn; Brock, Christopher; Leithold, Prof.Dr. Günter. |
| The aim of this work was to study seasonal changes of topsoil Ct and Nt contents in comparison with Ct and Nt mass changes. The survey was carried out under winter rye with succeeding catch crop. A special experimental design was chosen to minimize space/time interactions and prevent disturbance of sampling points at the same time. The observation of mass changes instead of content changes substantially improved the analytical quality of results in this study, which was in line with findings from the literature. It is concluded that considering bulk density should therefore be recommended as a standard procedure in surveys of soil Ct and Nt dynamics. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover. |
| Ano: 2009 |
URL: http://orgprints.org/14567/1/Hillebrecht_14567.pdf |
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| Cooper, Julia; Baranski, Marcin; Stewart, Gavin; Nobel-de Lange, Majimcha; Barberi, Paolo; Fliessbach, Andreas; Peigne, Joséphine; Berner, Alfred; Brock, Christopher; Casagrande, Marion; Crowley, Oliver; David, Christophe; De Vliegher, Alex; Döring, Thomas F.; Dupont, Aurélien; Entz, Martin; Grosse, Meike; Haase, Thorsten; Halde, Caroline; Hammerl, Verena; Huiting, Hilfred; Leithold, Günter; Messmer, Monika; Schloter, Michael; Sukkel, Wijnand; van der Heijden, Marcel G. A.; Willekens, Koen; Wittwer, Raphaël; Mäder, Paul. |
| Reduced tillage is increasingly promoted to improve sustainability and productivity of agricultural systems. Nonetheless, adoption of reduced tillage by organic farmers has been slow due to concerns about nutrient supply, soil structure, and weeds that may limit yields. Here, we compiled the results from both published and unpublished research comparing deep or shallow inversion tillage, with various categories of reduced tillage under organic management. Shallow refers to less than 25 cm. We found that (1) division of reduced tillage practices into different classes with varying degrees of intensity allowed us to assess the trade-offs between reductions in tillage intensity, crop yields, weed incidence, and soil C stocks. (2) Reducing tillage intensity in... |
| Tipo: Journal paper |
Palavras-chave: Soil quality; Soil tillage. |
| Ano: 2016 |
URL: http://orgprints.org/29974/1/Cooper-etal-2016-ASD-36_22.pdf |
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| Brock, Christopher; Leithold, G.. |
| Humus balances are intended to serve as instruments to support humus management in practice. Still, urgent need for adaptation especially with regard to apllication in organic farming has been stated. Results presented in this paper show that there in fact is a difference in humus repro-duction between conventional and organic farming that is not recognized in balance methods. In addition, the results exhibit a big uncertainty in balance results. They are pointing out basic problems of humus balance methods that are likely to be caused by an insufficient consideration of site-specific factors of the humus household and their interaction with farming. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality. |
| Ano: 2007 |
URL: http://orgprints.org/9348/1/9348_Brock_Vortrag.pdf |
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| Brock, Christopher; Leithold, Günter. |
| Recently a revised version of the German standard method for humus balancing according to VDLUFA has been published. In contrast to the preceeding version, the method now shall be applicable not only in conventional, but also organic farming systems. In this contribution, we try to define the scope of the three levels of organic matter demand parameters for crops applied in the method, as an applicable definition is missing in the VDLUFA method description. We do so by calculating crop uptake of mineralized humus-N from the balance parameters, and by linking N uptake to yield levels of crops. Further, we calculate humus balances for farming system treatments in the Organic Arable Farming Experiment Gladbacherhof (Villmar,Germany) and test the ability of... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop husbandry; Soil; Environmental aspects. |
| Ano: 2015 |
URL: http://orgprints.org/27222/1/27222_brock.pdf |
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| Brock, Christopher; Hoyer, Uta; Leithold, Günther; Hülsbergen, Kurt-Jürgen. |
| Humus balances provide a profitable approach for humus dynamics assessment in farming practice. Nevertheless, there is a clear demand for methodological adaptation. This article presents a new approach to humus balancing using reproducible algorithms for the estimation of balance coefficients. Humus balance coefficients for crops and organic fertilizers are estimated according to a bipartite algorithm. Humus demand is calculated on the basis of crop yields referring to the nitrogen household in the plant-soil system. Humus supply is derived from organic matter input with plant material and fertilizers. The new approach facilitates the adaptation of the method to new situations. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality. |
| Ano: 2008 |
URL: http://orgprints.org/12077/1/Brock_12077_ed.doc |
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| Brock, Christopher; Fließbach, Andreas; Oberholzer, Hans-Rudolf; Schulz, Franz; Wiesinger, Klaus; Reinicke, Frank; Koch, Wernfried; Pallutt, Bernhard; Dittman, Bärbel; Zimmer, Jörg; Hülsbergen, Kurt-Jürgen; Leithold, Günter. |
| The aim of this study was to evaluate the interaction between yield levels of nonleguminous crops and soil organic matter (SOM) under the specific conditions of organic and conventional farming, respectively, and to identify implications for SOM management in arable farming considering the farming system (organic vs. conventional). For that purpose, correlations between yield levels of nonlegume crops and actual SOM level (Corg, Nt, Chwe, Nhwe) as well as SOM-level development were examined including primary data from selected treatments of seven long-term field experiments in Germany and Switzerland. Yield levels of nonlegume crops were positively correlated with SOM levels, but the correlation was significant only under conditions of organic farming, and... |
| Tipo: Journal paper |
Palavras-chave: Soil quality; Crop husbandry. |
| Ano: 2011 |
URL: http://orgprints.org/21782/1/brock-etal-2011-JPlantNutrSoilSci-Vol174-p568-575.pdf |
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| Schulz, Franz; Brock, Christopher; Leithold, Günter. |
| Stockless management is increasing even in organic farming, but it is not known until now, whether organic matter supply is sufficient in such systems, or which measures are necessary to achieve a sustainable soil organic matter (SOM) management. Results from the long-term Organic Arable Farming Experiment Gladbacherhof (OAFEG) show that after two 6 y rotations, only a “mixed farm” treatment (MF) with fodder legumes in the rotation and cattle manure application corresponding to 1 LU ha-1 was able to maintain, and in the long term perhaps increase, SOM levels. The “stockless farm” with fodder legumes as green manure ley (SFL) was barely able to maintain the SOM level, while the “stockless cash crop farm” where organic matter supply relied on green manure... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality; Crop combinations and interactions; Nutrient turnover. |
| Ano: 2014 |
URL: http://orgprints.org/23963/1/23963_MM.pdf |
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| Blumenstein, Benjamin; Knebl, Lucas; Gattinger, Andreas; Brock, Christopher; Wufka, André; Möller, Detlev. |
| Stroh ist ein essentieller Bestandteil der Kohlenstoffversorgung landwirtschaftlicher Böden. Humusersatzstrategien mit Strohnutzung können vielfältige Auswirkungen sowohl auf die Organische Bodensubstanz als auch die jeweilige Kostenstruktur aufzeigen, abhängig von Verwendungsform und Logistik. Die ökonomische Analyse verschiedener Strohnutzungsstrategien identifiziert das Belassen des Strohs auf dem Feld als kostengünstigste Alternative, die allerdings große Kohlenstoffverlustpotenziale aufweisen kann. Die (über-)betriebliche Nutzung von Stroh und dessen Rückführung in Wirtschaftsdünger, Kompost oder Gärresten (WKG) auf den Acker scheint vordergründig mit höheren Kosten verbunden zu sein, besonders bei Berücksichtigung steigender Transportentfernungen.... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality; Farm economics; Farm nutrient management. |
| Ano: 2019 |
URL: http://orgprints.org/36218/1/Beitrag_294_final_a.pdf |
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| Blumenstein, Benjamin; Brock, Christopher; Dannehl, Theresa; Möller, Detlev. |
| Management measures to maintain or increase soil organic matter (SOM) are generally associated with additional costs and a decreasing profitability of crop rotations. However, certain SOM-enhancing strategies may have the potential to synergistically optimize also the economic output in the short or long term. We evaluated several crop rotations and green/straw manuring systems on diverging site properties in stockless farm systems for their effects on production economics. Benefits may especially derive from an increased spatio-temporal synchronization of crop nutrient demand and nutrient supply by turning green manures into mobile fertilizers, which can even result in short term economic benefits. However, as effects do not necessarily show instantly,... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality; Soil biology. |
| Ano: 2017 |
URL: http://orgprints.org/31806/1/Humusersatzstrategien%20aus%20%C3%B6konomischer%20Perspektive1.pdf |
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| Brock, Christopher; Leithold, Prof. Dr. Günter. |
| The impact of management and environmental site factors on quantitative and qualitative indicators of humus dynamics was investigated in eight long-term field experiments in Germany and neighbouring countries. Humus dynamics were basically influenced by environmental site conditions, but at a given site differences between farming systems could be ascerted. Mixed farming systems with farmyard manure application as a rule had a more favourable impact on humus dynamics than stockless systems. Whether an advantageous performance of humus dynamics in organic farming as compared to conventional farming will occur or not, is dependent on the respective farm types of both systems that are related to each other. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Soil; Crop husbandry. |
| Ano: 2008 |
URL: http://orgprints.org/12536/1/Brock_12536_ed.doc |
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| Leithold, Günter; Becker, Konstantin; Riffel, Alexandra; Schulz, Franz; Schmid-Eisert, Andreas; Brock, Christopher. |
| Nicht selten mangelt es in vielen Ökobetrieben an einer ausreichenden Versorgung der Ackerkulturen mit Stickstoff. Die Lage erscheint umso schwieriger, je stärker die Betriebe spezialisiert sind, also nicht dem klassischen Leitbild eines ökologischen Gemischtbetriebes mit Rinderhaltung entsprechen. Vorgestellt und diskutiert werden jüngste Forschungsergebnisse zu den Möglichkeiten einer verbesserten Stickstoffbereitstellung, insbesondere über einen erfolgreichen Anbau von Futterleguminosen. Es wird begründet, warum Klee, Luzerne oder Leguminosen-Gras-Gemenge nach wie vor in jede Ökofruchtfolge gehören. Zudem wird bewiesen, dass eine Schwefeldüngung auf Schwefelmangelstandorten zur Verdopplung der Luftstickstoffbindung der Futterleguminosen beitragen kann.... |
| Tipo: Book |
Palavras-chave: "Organics" in general Cereals; Pulses and oilseeds Composting and manuring Nutrient turnover. |
| Ano: 2015 |
URL: http://orgprints.org/29525/1/N%2BS%20im%20OL_Summary.pdf |
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| Schulz, Franz; Brock, Christopher; Leithold, Günter. |
| An organic long-term field experiment has been carried out at the experimental station Gladbacherhof (Giessen University, Germany) since 1998 to survey the performance of agronomical, economical and ecological indicators dependant on farm type and tillage intensity. This article presents results on cash crop yields and changes in humus contents in the first two rotations of the experiment. It can be concluded that organic stockless farming without ley affects cash crop yields and demands special attention with regard to a sustainable humus management. Stockless farming with rotational ley on the other hand up to now showed a satisfactory performance when compared to a mixed farm type with livestock. As for the yields, reduced tillage systems could cope... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Soil tillage. |
| Ano: 2008 |
URL: http://orgprints.org/11990/1/Schulz_11990_ed.doc |
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| Schulz, Franz; Brock, Christopher; Leithold, Günter. |
| An organic long-term-field experiment with two factors has been carried out since 1998 at the experimental station Gladbacherhof, University of Giessen. Effects of different crop rotations combined with tillage treatments (mouldboard plough, twolayer- plough and tillage without plough) on plants, soil and weeds have been investigated. This article presents results on cash crop yields and weeds according to soil tillage. It can be concluded that, as for the yields, reduced tillage systems could cope with the regularly ploughed reference system if at least a shallow soil inversion was carried out. Concerning the lower yields in the soil tillage system without ploughing the impact of nutrient availability seems to be more important than the... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Weed management; Soil tillage. |
| Ano: 2009 |
URL: http://orgprints.org/14272/1/Schulz_14272.pdf |
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| Registros recuperados: 34 | |
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