Arid
DOI10.1016/j.agee.2007.01.011
Evaluation of two soil carbon models using two Kenyan long term experimental datasets
Kamoni, P. T.; Gicheru, P. T.; Wokabi, S. M.; Easter, M.; Milne, E.; Coleman, K.; Falloon, P.; Paustian, K.; Killian, K.; Kihanda, F. M.
通讯作者Kamoni, P. T.
来源期刊AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN0167-8809
EISSN1873-2305
出版年2007
卷号122期号:1页码:95-104
英文摘要

RothC and Century are two of the most widely used soil organic matter (SOM) models. However there are few examples of specific parameterisation of these models for environmental conditions in East Africa. The aim of this study was therefore, to evaluate the ability of RothC and the Century to estimate changes in soil organic carbon (SOC) resulting from varying land use/management practices for the climate and soil conditions found in Kenya. The study used climate, soils and crop data from a long term experiment (1976-2001) carried out at The Kabete site at The Kenya National Agricultural Research Laboratories (NARL, located in a semi-humid region) and data from a 13 year experiment carried out in Machang’a (Embu District, located in a semi-arid region). The NARL experiment included various fertiliser (0, 60 and 120 kg of N and P2O5 ha(-1)), farmyard manure (FYM - 5 and 10 t ha(-1)) and plant residue treatments, in a variety of combinations. The Machang’a experiment involved a fertiliser (51 kg N ha(-1)) and a FYM (0, 5 and 10 t ha(-1)) treatment with both monocropping and intercropping. At Kabete both models showed a fair to good fit to measured data, although Century simulations for treatments with high levels of FYM were better than those without. At the Machang’a site with monocrops, both models showed a fair to good fit to measured data for all treatments. However, the fit of both models (especially RothC) to measured data for intercropping treatments at Machang’a was much poorer. Further model development for intercrop systems is recommended. Both models can be useful tools in soil C Predictions, provided time series of measured soil C and crop production data are available for validating model performance against local or regional agricultural crops. (C) 2007 Elsevier B.V. All rights reserved.


英文关键词model evaluation RothC century Kenya soil organic carbon land management
类型Article
语种英语
国家Kenya ; USA ; England
收录类别SCI-E
WOS记录号WOS:000246320300010
WOS关键词ORGANIC-MATTER ; FERTILIZER ; DYNAMICS
WOS类目Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS研究方向Agriculture ; Environmental Sciences & Ecology
来源机构Colorado State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/153371
作者单位(1)Natl Agr Res Labs, Nairobi, Kenya;(2)Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523 USA;(3)Univ Reading, Dept Soil Sci, Reading RG6 6DW, Berks, England;(4)Rothamsted Res, Agr & Environm Div, Harpenden AL5 2JQ, Herts, England;(5)Hadley Ctr Climate Predict & Res, Met Off, Exeter EX1 3PB, Devon, England;(6)Kenya Agr Res Inst, Embu, Kenya
推荐引用方式
GB/T 7714
Kamoni, P. T.,Gicheru, P. T.,Wokabi, S. M.,et al. Evaluation of two soil carbon models using two Kenyan long term experimental datasets[J]. Colorado State University,2007,122(1):95-104.
APA Kamoni, P. T..,Gicheru, P. T..,Wokabi, S. M..,Easter, M..,Milne, E..,...&Kihanda, F. M..(2007).Evaluation of two soil carbon models using two Kenyan long term experimental datasets.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,122(1),95-104.
MLA Kamoni, P. T.,et al."Evaluation of two soil carbon models using two Kenyan long term experimental datasets".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 122.1(2007):95-104.
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