Sensitivity analysis, calibration and validation of EPIC for modelling soil phosphorus dynamics in Swiss agro-ecosystems

被引:23
作者
Della Peruta, Raniero [1 ]
Keller, Armin [1 ]
Schulin, Rainer [2 ]
机构
[1] Swiss Soil Monitoring Network NABO Agroscope, CH-8046 Zurich, Switzerland
[2] ETH, ITES, CH-8092 Zurich, Switzerland
关键词
EPIC model; Soil phosphorus; Model calibration; Sensitivity analysis; Uncertainty; Soil monitoring; Bioturbation; GLOBAL SENSITIVITY; UNCERTAINTY ANALYSIS; NUTRIENT MANAGEMENT; BALANCES; WATERSHEDS; FERTILIZER; FRAMEWORK; LOSSES; RUNOFF; LITTER;
D O I
10.1016/j.envsoft.2014.08.018
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
Proper management of soil phosphorus (P) is essential to ensure sustainability in agriculture. To avoid excessive P accumulation in soil, a methodology for predicting long-term variations in soil P content is required. Using the Swiss Soil Monitoring Network (NABO) database, we tested the efficiency of the model EPIC to predict soil P temporal changes for typical Swiss arable and grassland sites. After performing a sensitivity analysis to identify the most influential model parameters for which calibration was needed, we calibrated the influential parameters on the available topsoil P data of 4 selected NABO sites and then we tested the calibrated model by comparison of predictions with data from a second set of 14 sites. We found that the model performance for grassland sites improved significantly when site-specific estimates of bioturbation depth were used. These site-specific estimates showed a close relationship to independently assessed subsoil hydromorphy. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:97 / 111
页数:15
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