DOI: 10.1002/2014MS000311
Scopus记录号: 2-s2.0-84924631293
论文题名: Dependency of parameter values of a crop model on the spatial scale of simulation
作者: Iizumi T ; , Tanaka Y ; , Sakurai G ; , Ishigooka Y ; , Yokozawa M
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 6, 期: 3 起始页码: 527
结束页码: 540
语种: 英语
英文关键词: Earth atmosphere
; Plants (botany)
; Temperature
; Cooling (heating) degree day
; Crop growth and yields
; Crop model
; Model calibration
; Optimum temperature
; Regional crops
; Specific parameter values
; Technological level
; Crops
; agricultural modeling
; agricultural technology
; air temperature
; calibration
; crop yield
; cultivar
; curvature
; growth rate
; low temperature
; model validation
; phenology
; photoperiod
; rice
; spatial analysis
; yield response
; Japan
英文摘要: Reliable regional-scale representation of crop growth and yields has been increasingly important in earth system modeling for the simulation of atmosphere-vegetation-soil interactions in managed ecosystems. While the parameter values in many crop models are location specific or cultivar specific, the validity of such values for regional simulation is in question. We present the scale dependency of likely parameter values that are related to the responses of growth rate and yield to temperature, using the paddy rice model applied to Japan as an example. For all regions, values of the two parameters that determine the degree of yield response to low temperature (the base temperature for calculating cooling degree days and the curvature factor of spikelet sterility caused by low temperature) appeared to change relative to the grid interval. Two additional parameters (the air temperature at which the developmental rate is half of the maximum rate at the optimum temperature and the value of developmental index at which point the crop becomes sensitive to the photoperiod) showed scale dependency in a limited region, whereas the remaining three parameters that determine the phenological characteristics of a rice cultivar and the technological level show no clear scale dependency. These results indicate the importance of using appropriate parameter values for the spatial scale at which a crop model operates. We recommend avoiding the use of location-specific or cultivar-specific parameter values for regional crop simulation, unless a rationale is presented suggesting these values are insensitive to spatial scale. Key Points The dependency of parameters of a crop model to spatial scales is examined Parameters representing the yield response to temperature showed the dependency Results indicate the importance of appropriate parameters for regional scale © 2014. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/76007
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: National Institute for Agro-Environmental Sciences, Tsukuba, Japan; Graduate School of Life, Environmental Sciences University of Tsukuba, Tsukuba, Japan; Graduate School of Engineering, Shizuoka University, Hamamatsu, Japan
Recommended Citation:
Iizumi T,, Tanaka Y,, Sakurai G,et al. Dependency of parameter values of a crop model on the spatial scale of simulation[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,6(3)