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| Stinner, Walter; Möller, Kurt; Leithold, Günter. |
| Problemstellung/Ziele:Analog zur Entwicklung im konventionellen Landbau ist auch im Ökologischen Landbau eine zunehmende Tendenz zu viehloser Wirtschaftsweise festzustellen. Viehlose Betriebe können auf die Vorteile des Kleegrasanbaues (N-Versorgung, Unkrautbekämpfung) kaum verzichten. Üblicherweise wird der Aufwuchs gemulcht und auf der Fläche belassen, ebenso die übrigen Rest- und Koppelprodukte (Stroh von Getreide und Körnerleguminosen, Zwischenfruchtaufwüchse, u.ä.). Damit können erhebliche N-Verluste verbunden sein, zum Einen als Ammoniakfreisetzungen beim Abbau des Kleegrasmulches (u.a. ANDREN, 1987), zum Anderen durch Minderleistungen der Stickstofffixierung gemulchter Bestände, die mineralisierten Stickstoff aufnehmen und dabei die eigene... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Recycling; Balancing and resource management Composting and manuring Air and water emissions. |
| Ano: 2003 |
URL: http://orgprints.org/4528/1/4528%2Dstinner%2D2003%2Dbiogas.pdf |
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| Möller, Dr. Kurt; Stinner, Walter; Deuker, Arno; Leithold, Prof. Dr. Günter. |
| In two agricultural systems with and without animal husbandry the potential to produce renewable energy by digesting slurry and organic residues to biogas were assessed. In comparison to some other methods of energy production by biomass biogas production has the advantage of keeping the nutrients of the substrates within the agricultural system. They can be used as fertilisers. In the investigated system with milk production (0,8 cows ha-1, 8 crops, among them 4 cereals, peas, potatoes and 2 clover grasses with catch crops after winter cereals and peas (see DEUKER et al. 2005), it is possible not only to ferment slurry, but also catch crops and straw of peas and cereals. The methan production potential by digesting only slurry is the equivalent of around... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Recycling; Balancing and resource management Composting and manuring Air and water emissions. |
| Ano: 2005 |
URL: http://orgprints.org/3706/1/3706.pdf |
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| Stinner, Walter; Möller, Dr. Kurt; Leithold, Prof. Dr. Günter. |
| In organic farming systems without livestock some problems arise concerning the nitrogen management: On the one hand, there is a lack of transportable nitrogen fertilisers, on the other hand there is a potential for high losses with the usual management. The biological N2 fixation is decreased, when clover grass is mulched. If the biomass of intercrops and clover grass gets mineralised in autumn, it can be leached in winter. In the trial referred to here, the impact of fermentation of biomass on some agricultural parameters like yield etc. are investigated within a crop-rotation of clover grass, potatoes, winter wheat, peas, winter wheat and summer wheat with undersown clover grass. Intercrops are sown after winter wheat and peas. In the control... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover. |
| Ano: 2005 |
URL: http://orgprints.org/3717/1/3717.pdf |
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| Möller, Kurt; Stinner, Walter; Leithold, Günter. |
| The effect of different management strategies on growth, composition and nutrient up¬take of a cover crop mixture of summer vetch and oil radish were tested in field ex¬pe¬ri¬ments on the Research Station Gladbacherhof. Slurry application and cereal straw management (incorporation vs. harvesting) affected composition of cover crop signifi-cantly: slurry application decreased legume content and biological N2-fixation signifi-cantly. By this way the N-input in farm cycle were reduced. The higher the amount of straw residues were left on field, the higher the legume content was in the cover crop mixture. High legume content in cover crop mixtures not only increased N2-fixation, but also P uptake of the cover crop. According to available literature... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions. |
| Ano: 2007 |
URL: http://orgprints.org/9639/1/9639_M%C3%B6ller_Vortrag.pdf |
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| Möller, Kurt; Stinner, Walter; Leithold, Günter. |
| System effects of biogas fermentation in organic cropping systems with and without livestock (dairy farming) were investigated from 2002-2005. In both systems no differences in yields and nutrient uptake were detected in the legume crops. In the livestock-system non legume crops of the slurry system had no higher yields but a higher nitrogen uptake (6 %) than the stable manure system. Slurry-fermentation had no effect on yields and nitrogen uptake. The inclusion of crop residues in the fermentation system increased the nitrogen uptake about by 10 % and reduced the nitrate leaching potential by ca. 10 %. The inclusion of external substrates lead to a further increase in nitrogen yield of 10 %, but to no significant increase in dry matter yields.... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Air and water emissions; Composting and manuring. |
| Ano: 2006 |
URL: http://orgprints.org/7223/1/kurt_moeller_biogas.doc |
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| Stinner, Walter; Möller, Dr. Kurt; Leithold, Prof. Dr. Günter. |
| A common practice in stockless organic farming systems is to leave the biomass from clover/grass-ley and crop residues in the field for their residual fertility effect. No farmyard manures for transfer of nutrients within the system are available. Clover/grass-ley biomass and crop residues represents an unexploited energy potential that could be harnessed by the digestion in biogas plants for production of methane, thus replacing ruminants by the biogas digester. In field trials by implementing a whole crop rotation comprehending six crops were carried out in 2002-2005 to evaluate whether the use of N could be improved by processing biomass described above in a biogas digester and using the effluents as a fertilizer, compared to general practice. Results... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farm nutrient management. |
| Ano: 2008 |
URL: http://orgprints.org/12370/1/Stinner_12370_ed.doc |
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| Möller, Dr. Kurt; Stinner, Walter; Leithold, Prof. Dr. Günter. |
| Manures and crop residues can be utilised for digestion, without any significant losses of nutrients. This paper presents the results of field trials about the effects of biogas digestion in a mixed organic cropping systems on nutrient cycling and yield of a whole crop rotation. Digestion of slurry affected yields and N uptake only after soil incorporation. The inclusion of crop residues for digestion increased the amounts of “mobile” manure. N uptake and yield of non-leguminous main crops increased about 10%, due to a more adapted allocation of nutrients within the whole cropping system by reallocation of N towards the crops with higher N needs. Additionally, removing the cover crops in autumn and their digestion increased the fertilizing efficiency of N,... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Composting and manuring. |
| Ano: 2008 |
URL: http://orgprints.org/12308/1/Moeller_12308_ed.doc |
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