A simple model for quantifying change in soil organic C as influenced by tillage and crop rotations on the Canadian prairies
| dc.contributor.author | Liang, B.C. | |
| dc.contributor.author | McConkey, B.G. | |
| dc.contributor.author | Campbell, C.A. | |
| dc.contributor.author | Janzen, H.H. | |
| dc.date.accessioned | 2018-09-02T19:59:42Z | |
| dc.date.available | 2018-09-02T19:59:42Z | |
| dc.date.issued | 2000-02-22 | |
| dc.description.abstract | Simulation models are required for quantifying the impact of crop rotations and tillage on soil organic C dynamics, and for aggregating C sequestration over a relatively large area. However, most current models of soil organic C have been built based on kinetically defined discrete pools with different turnover times. Those pools of soil organic C only exist conceptually. They have not been determined experimentally, thus validation of kinetic models describing soil organic C turnover is usually difficult or not independent from actual measurements. Thus, there is a need to develop a simulation model that can be easily validated and used for estimating future projection of C sequestration under specified management practices. A simple model has been developed to quantify the impact of crop rotations and tillage on soil organic C and validated using long-term field experiments conducted on the Canadian prairies. This simple model required a few input parameters and accurately predicted the change of soil organic C with a relative error of 5% or better. Crop rotation in cereal-dominant cropping systems, affected the amount of soil organic C due to differences in the amount of crop residue inputs. Clay content of soil played a vital role in determining the soil organic C sequestered under conservation tillage compared to tilled systems. This study also showed that the rate constant of soil organic C turnover was about the same for all systems in the drier region of the Canadian prairies, regardless of soil texture and the cropping system. | en_US |
| dc.description.version | Non-Peer Reviewed | |
| dc.identifier.uri | http://hdl.handle.net/10388/9976 | |
| dc.language.iso | en | en_US |
| dc.relation.ispartof | Soils and Crops Workshop | |
| dc.rights | Attribution-NonCommercial-NoDerivs 2.5 Canada | * |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/2.5/ca/ | * |
| dc.title | A simple model for quantifying change in soil organic C as influenced by tillage and crop rotations on the Canadian prairies | en_US |
| dc.type | Poster Presentation | en_US |