Chirinda, Mr Ngonidzashe; Olesen, Professor Jørgen, E. and Porter, Professor John, R (2008) Effects of organic matter input on soil microbial properties and crop yields in conventional and organic cropping systems. Paper at: Second Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR), Modena Italy, 18-20 June 2008 in Modena Italy.
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:||Paper|
|Keywords:||soil organic matter, crop yield, crop rotation, soil microbiology.|
|Subjects:||Soil > Soil quality|
|Research affiliation:||Denmark > AU - Aarhus University > AU, DJF - Faculty of Agricultural Sciences|
|Deposited By:||Chirinda, Dr Ngonidzashe|
|Deposited On:||30 Sep 2008|
|Last Modified:||12 Apr 2010 07:38|
|Refereed:||Peer-reviewed and accepted|
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