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Effects of organic matter input on soil microbial properties and crop yields in conventional and organic cropping systems

Chirinda, Mr Ngonidzashe and Olesen, Professor Jørgen, E. (2008) Effects of organic matter input on soil microbial properties and crop yields in conventional and organic cropping systems. Poster at: Cultivating the Future Based on Science: 2nd Conference of the International Society of Organic Agriculture Research ISOFAR, Modena, Italy, June 18-20, 2008.

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Summary

Unlike conventional cropping systems, which are characterised by targeted short-term fertility management, organic farming systems depend on long-term increase in soil fertility and promotion of soil biodiversity. This study sought to investigate long-term effects of organic matter inputs on various cropping systems in a 10-year-old experiment. Results show that in the long-term high C and N inputs enhance microbial activity. Microbial biomass N and the potential nitrification rate were higher in cropping systems based on green manure than in those reliant on inputs from animal manure and mineral fertilizer. Soil microbiological properties were affected by the individual crops in the rotation. The high microbial activity with increased organic matter inputs did not transform to enhanced crop productivity.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Keywords:soil organic matter, crop yield, crop rotation, soil microbiology
Subjects: Soil > Nutrient turnover
Soil > Soil quality
Research affiliation: International Conferences > 2008: IFOAM OWC: Research Track / ISOFAR > 2.2 Nutrient management
International Conferences > 2008: IFOAM OWC: Research Track / ISOFAR > 2.1 Soil fertility
Deposited By: Chirinda, Dr Ngonidzashe
ID Code:11700
Deposited On:23 Sep 2008
Last Modified:12 Apr 2010 07:35
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:This paper is published in the conference proceedings:
Neuhoff, Daniel; Halberg, Niels; Alfldi, Thomas; Lockeretz, William; Thommen, Andreas; Rasmussen, Ilse A.; Hermansen, John; Vaarst, Mette; Lck, Lorna; Carporali, Fabio; Jensen, Henning Hgh; Migliorini, Paola and Willer, Helga, Eds. (2008) .Cultivating the Future Based on Science. Proceedings of the Second Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR), held at the 16th IFOAM Organic World Congress in Cooperation with the International Federation of Organic Agriculture Movements (IFOAM) and the Consorzio ModenaBio, 18 . 20 June 2008 in Modena, Italy.. International Society of Organic Agriculture Research (ISOFAR), c/o IOL, DE-Bonn, Research Institute of Organic Agriculture FiBL, CH-Frick. http://orgprints.org/13672 and http://orgprints.org/13674

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