home    about    browse    search    latest    help 
Login | Create Account

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

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.

[img] PDF
57Kb

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: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
ID Code:14656
Deposited On:30 Sep 2008
Last Modified:12 Apr 2010 07:38
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

Repository Staff Only: item control page