Calibration and validation of models for short-term decomposition and N mineralization.
Insight of nutrient release patterns associated with the decomposition of plant residues is important for their effective use as a green manure in food production systems. Thus, this study aimed to evaluate the ability of the Century, APSIM and NDICEA simulation models for predicting the decomposition and N mineralization of crop residues in the tropical Atlantic forest biome, Brazil. The simulation models were calibrated based on actual decomposition and N mineralization rates of three types of crop residues with different chemical and biochemical composition. The models were also validated for different pedo-climatic conditions and crop residues conditions. In general, the accuracy of decomposition and N mineralization improved after calibration. Overall RMSE values for the decomposition and N mineralization of the crop materials varied from 7.4 to 64.6 % before models calibration compared to 3.7 to 16.3 % after calibration. Therefore, adequate calibration of the models is indispensable for use them under humid tropical conditions. The NDICEA model generally outperformed the other models. However, the decomposition and N mineralization was not very accurate during the first 30 days of incubation, especially for easily decomposable crop residues. An additional model variable may be required to capture initial microbiological growth as affected by the moisture dynamics of the residues, as is the case in surface residues decomposition models
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2014-02-11
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Subjects: | Modeling, Nutrient cycling, Organic agriculture., soil organic matter., |
Online Access: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/979454 https://doi.org/10.1590/S0103-90162012000600008 |
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dig-alice-doc-9794542017-08-16T00:20:28Z Calibration and validation of models for short-term decomposition and N mineralization. NASCIMENTO, A. F. do MENDONÇA, E. de S. LEITE, L. F. C. SCHOLBERG, J. NEVES, J. C. L. ALEXANDRE FERREIRA DO NASCIMENTO, CNPS EDUARDO DE SÁ MENDONÇA, UFV/UFES LUIZ FERNANDO CARVALHO LEITE, CPAMN JOHANNES SCHOLBERG, University of Wageningen JULIO CESAR LIMA NEVES, UFV. Modeling Nutrient cycling Organic agriculture. soil organic matter. Insight of nutrient release patterns associated with the decomposition of plant residues is important for their effective use as a green manure in food production systems. Thus, this study aimed to evaluate the ability of the Century, APSIM and NDICEA simulation models for predicting the decomposition and N mineralization of crop residues in the tropical Atlantic forest biome, Brazil. The simulation models were calibrated based on actual decomposition and N mineralization rates of three types of crop residues with different chemical and biochemical composition. The models were also validated for different pedo-climatic conditions and crop residues conditions. In general, the accuracy of decomposition and N mineralization improved after calibration. Overall RMSE values for the decomposition and N mineralization of the crop materials varied from 7.4 to 64.6 % before models calibration compared to 3.7 to 16.3 % after calibration. Therefore, adequate calibration of the models is indispensable for use them under humid tropical conditions. The NDICEA model generally outperformed the other models. However, the decomposition and N mineralization was not very accurate during the first 30 days of incubation, especially for easily decomposable crop residues. An additional model variable may be required to capture initial microbiological growth as affected by the moisture dynamics of the residues, as is the case in surface residues decomposition models 2014-02-11T11:11:11Z 2014-02-11T11:11:11Z 2014-02-11 2012 2018-02-01T11:11:11Z Artigo de periódico Scientia Agricola, Piracicaba, v. 69, n. 6, p. 393-401, Nov./Dec. 2012. http://www.alice.cnptia.embrapa.br/alice/handle/doc/979454 https://doi.org/10.1590/S0103-90162012000600008 pt_BR por openAccess |
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Modeling Nutrient cycling Organic agriculture. soil organic matter. Modeling Nutrient cycling Organic agriculture. soil organic matter. |
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Modeling Nutrient cycling Organic agriculture. soil organic matter. Modeling Nutrient cycling Organic agriculture. soil organic matter. NASCIMENTO, A. F. do MENDONÇA, E. de S. LEITE, L. F. C. SCHOLBERG, J. NEVES, J. C. L. Calibration and validation of models for short-term decomposition and N mineralization. |
description |
Insight of nutrient release patterns associated with the decomposition of plant residues is important for their effective use as a green manure in food production systems. Thus, this study aimed to evaluate the ability of the Century, APSIM and NDICEA simulation models for predicting the decomposition and N mineralization of crop residues in the tropical Atlantic forest biome, Brazil. The simulation models were calibrated based on actual decomposition and N mineralization rates of three types of crop residues with different chemical and biochemical composition. The models were also validated for different pedo-climatic conditions and crop residues conditions. In general, the accuracy of decomposition and N mineralization improved after calibration. Overall RMSE values for the decomposition and N mineralization of the crop materials varied from 7.4 to 64.6 % before models calibration compared to 3.7 to 16.3 % after calibration. Therefore, adequate calibration of the models is indispensable for use them under humid tropical conditions. The NDICEA model generally outperformed the other models. However, the decomposition and N mineralization was not very accurate during the first 30 days of incubation, especially for easily decomposable crop residues. An additional model variable may be required to capture initial microbiological growth as affected by the moisture dynamics of the residues, as is the case in surface residues decomposition models |
author2 |
ALEXANDRE FERREIRA DO NASCIMENTO, CNPS |
author_facet |
ALEXANDRE FERREIRA DO NASCIMENTO, CNPS NASCIMENTO, A. F. do MENDONÇA, E. de S. LEITE, L. F. C. SCHOLBERG, J. NEVES, J. C. L. |
format |
Artigo de periódico |
topic_facet |
Modeling Nutrient cycling Organic agriculture. soil organic matter. |
author |
NASCIMENTO, A. F. do MENDONÇA, E. de S. LEITE, L. F. C. SCHOLBERG, J. NEVES, J. C. L. |
author_sort |
NASCIMENTO, A. F. do |
title |
Calibration and validation of models for short-term decomposition and N mineralization. |
title_short |
Calibration and validation of models for short-term decomposition and N mineralization. |
title_full |
Calibration and validation of models for short-term decomposition and N mineralization. |
title_fullStr |
Calibration and validation of models for short-term decomposition and N mineralization. |
title_full_unstemmed |
Calibration and validation of models for short-term decomposition and N mineralization. |
title_sort |
calibration and validation of models for short-term decomposition and n mineralization. |
publishDate |
2014-02-11 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/979454 https://doi.org/10.1590/S0103-90162012000600008 |
work_keys_str_mv |
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_version_ |
1756019206506151936 |