Aufsatz
Effects of manure quality and application forms on soil C and N turnover of a subtropical oasis soil under laboratory conditions
Abstract
Our knowledge of the agricultural sustainability of the millennia-old mountain oases in northern Oman is restricted in particular with respect to C and N turnover. A laboratory study was conducted (1) to analyse the effects of rewetting and drying on soil microorganisms after adding different manures, (2) to investigate the effects of mulching or incorporating of these manures, and (3) to evaluate the relationships between C and N mineralisation rates and manure quality indices. During the first 9-day rewetting and drying cycle, i.e. the “mulch” period, the content of extractable organic C decreased by approximately 40% in all four treatments. During the second 9-day rewetting and drying cycle, i.e. the “incorporation” period, this fraction decreased insignificantly in almost all treatments. The control and mature manure treatments form the first pair with a low percentage of total organic C evolved as CO2 (0.3% in 18 days) and a considerable percentage of total N mineralised as NH4 and NO3 (1% in 18 days), the fresh and immature manure treatments form the second pair with a higher amount of total organic C evolved as CO2 (0.5% in 18 days) and no net N mineralisation. During the first 9-day rewetting and drying cycle, the contents of microbial biomass C and biomass N increased by approximately 150% in all four treatments. During the second 9-day rewetting and drying cycle, no further increase was observed in the control and immature manure treatments and a roughly 30% increase in the other two treatments.
Citation
In: Biology and fertility of soils. Berlin : Springer. 39.2003, H. 3, S. 165-171Collections
Publikationen (Fachgebiet Ökologischer Pflanzenbau und Agrarökosystemforschung in den Tropen und Subtropen)Citation
@article{urn:nbn:de:hebis:34-2007051118169,
author={Wichern, Florian and Müller, Torsten and Jörgensen, Rainer Georg and Bürkert, Andreas},
title={Effects of manure quality and application forms on soil C and N turnover of a subtropical oasis soil under laboratory conditions},
year={2003}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 2003$n2003 1500 1/eng 2050 ##0##urn:nbn:de:hebis:34-2007051118169 3000 Wichern, Florian 3010 Müller, Torsten 3010 Jörgensen, Rainer Georg 3010 Bürkert, Andreas 4000 Effects of manure quality and application forms on soil C and N turnover of a subtropical oasis soil under laboratory conditions / Wichern, Florian 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/urn:nbn:de:hebis:34-2007051118169=x R 4204 \$dAufsatz 4170 7136 ##0##urn:nbn:de:hebis:34-2007051118169
2007-05-11T16:03:11Z 2007-05-11T16:03:11Z 2003 0178-2762 1432-0789 urn:nbn:de:hebis:34-2007051118169 http://hdl.handle.net/123456789/2007051118169 205240 bytes application/pdf eng Urheberrechtlich geschützt https://rightsstatements.org/page/InC/1.0/ Rewetting Drying Microbial biomass CO2 evolution N mineralisation 630 Effects of manure quality and application forms on soil C and N turnover of a subtropical oasis soil under laboratory conditions Aufsatz Our knowledge of the agricultural sustainability of the millennia-old mountain oases in northern Oman is restricted in particular with respect to C and N turnover. A laboratory study was conducted (1) to analyse the effects of rewetting and drying on soil microorganisms after adding different manures, (2) to investigate the effects of mulching or incorporating of these manures, and (3) to evaluate the relationships between C and N mineralisation rates and manure quality indices. During the first 9-day rewetting and drying cycle, i.e. the “mulch” period, the content of extractable organic C decreased by approximately 40% in all four treatments. During the second 9-day rewetting and drying cycle, i.e. the “incorporation” period, this fraction decreased insignificantly in almost all treatments. The control and mature manure treatments form the first pair with a low percentage of total organic C evolved as CO2 (0.3% in 18 days) and a considerable percentage of total N mineralised as NH4 and NO3 (1% in 18 days), the fresh and immature manure treatments form the second pair with a higher amount of total organic C evolved as CO2 (0.5% in 18 days) and no net N mineralisation. During the first 9-day rewetting and drying cycle, the contents of microbial biomass C and biomass N increased by approximately 150% in all four treatments. During the second 9-day rewetting and drying cycle, no further increase was observed in the control and immature manure treatments and a roughly 30% increase in the other two treatments. open access In: Biology and fertility of soils. Berlin : Springer. 39.2003, H. 3, S. 165-171 Wichern, Florian Müller, Torsten Jörgensen, Rainer Georg Bürkert, Andreas The original publication is available at www.springerlink.com
The following license files are associated with this item: