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Stickstoffdüngewirkung und Stickstofftransfereffizienz von Düngemitteln auf Basis von Kleegrasbiomasse im Gefäßversuch mit Weidelgras (Lolium perenne)

Benke, A.; Rieps, A.; Zikeli, Sabine and Möller, Kurt (2017) Stickstoffdüngewirkung und Stickstofftransfereffizienz von Düngemitteln auf Basis von Kleegrasbiomasse im Gefäßversuch mit Weidelgras (Lolium perenne). Paper at: 14. Wissenschaftstagung Ökologischer Landbau, Campus Weihenstephan, Freising-Weihenstephan, 07.-10. März 2017.

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The aim of our research was to compare the N fertilizer value of different clover-grass (CG) based fertilizers. A pot trial was set up with 8 treatments with Lolium perenne:
fresh CG, ensiled CG, compost from CG, solid manure and liquid manure from dairy cows fed with CG, biogas digestate, an unfertilized and a mineral fertilizer control. Our
hypothesis was that compared to composting, and to other treatments (e.g. silage) biogas digestates allow for a more efficient N fertilization due to a lower C/N ratio and
a higher share of NH4 +. Dry matter yield, C/N ratio, N concentration, N release and Nitrogen use efficiency (NUE) were examined. The results show the highest overall
NUE, N release and yield in the treatment with biogas digestate and the lowest in the compost treatment. The overall efficiency of a treatment approach was also influenced by the N transfer rates during the entire treatment chain. The short-term N fertilizer
efficiency was mainly influenced by the characteristics of the amendments used, while the long-term N fertilizer efficiency is mainly influenced by the transfer factors during the chain harvesting treatment fertilization. In conclusion, any approach for a more efficient N use from the clover grass biomass-N should focus on reduction of N-losses
while the chemical characteristics of the obtained fertilizer product is less relevant.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:clover-grass, nitrogen use efficiency, silage, compost, biogas digestate
Subjects: Crop husbandry > Production systems > Pasture and forage crops
Crop husbandry > Production systems > Cereals, pulses and oilseeds
Crop husbandry > Composting and manuring
Soil > Nutrient turnover
Research affiliation: Germany > University of Hohenheim > Institute of Crop Science
International Conferences > 2017: Scientific Conference German Speaking Countries > Soil fertility
Germany > University of Hohenheim > Coordination for organic farming and consumer protection
Deposited By: Hasreiter, Anna
ID Code:31878
Deposited On:04 Jul 2017 17:21
Last Modified:04 Jul 2017 17:21
Document Language:German/Deutsch
Refereed:Peer-reviewed and accepted
Additional Publishing Information:Dieser Beitrag ist im Tagungsband der 14. Wissenschaftstagung erschienen.
S. Wolfrum, H. Heuwinkel, H.J. Reents, u.a. (Hrsg.) (2017): Ökologischen Landbau weiterdenken - Verantwortung übernehmen - Vertrauen stärken. Beiträge der 14. Wissenschaftstagung Ökologischer Landbau, Freising-Weihenstephan, 7.-10. März 2017
Verlag Dr. Köster, Berlin

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