小麦模型WheatSM参数调试优化方法研究

doi:10.19788/j.issn.2096-6369.210302

Abstract

Abstract:

The crop growth model is an effective tool to evaluate crop production, resource utilization, and climate change impact. The WheatSM (Wheat Growth and Development Simulation Model) has been applied to crop production optimization and management and has achieved good achievements. However, because of the large number of model parameters, it’s complicated to debug the model parameters. To determine the parameters of the WheatSM model quickly and accurately, it is necessary to simplify the parameter adjustment work of the model and promote its wide application in the field of agricultural meteorology. In this study, on the basis of automatic adjustment methods of crop model parameters at home and abroad, an automatic adjustment coupling system of WheatSM model parameters is constructed based on the PEST (Parameter Estimation) method. The phenology and yield parameters of the WheatSM model were optimized automatically. Shangzhuang, Beijing was selected as a representative site.This study compared the optimization results with the trial-and-error simulation results, andused the automatic optimization method and trial-and-error method to adjust wheat phenology parameters and yield parameters for wheat growth model WheatSM, based on the meteorological data, soil data of the test sites, and the test data of different sowing dates of winter wheat from 2014 to 2016. The results show that the PEST method has high precision and good simulation effect for automatic adjustment and optimization of model parameters. The error of simulated phenology was less than 7 days, and the error of simulated yield was less than 228.63 kg·hm^-2. The PEST method has the advantages of being less time consuming and allowing for the simultaneous batch processing of data. Using this automatic parameter adjustment system can reduce the workload of parameter calibration, save model operation time, simplify work complexity, and obtain higher simulation accuracy. This study provides a convenient method for WheatSM parameters automatic optimization and a theoretical reference and guidance for improving the efficiency and accuracy of crop model parameters calibration.

Key words: wheat, PEST, WheatSM model, parameter optimization, phenology, yield, crop growth model

CLC Number:

S152

Xiafei Jin, Xianguan Chen, Zhihong Gong, Liping Feng. Parameter Adjustment and Optimization Methods for The WheatSM[J].Journal of Agricultural Big Data, 2021, 3(3): 13-22.

Figures/Tables 6

Table 1

The related parameters of the growth and yield of wheat in the WheatSM model"

参数名称 Parameter name	描述 Definition	取值范围 Range of value	试错法 Trial-and-error method	PEST
K1	播种-出苗阶段基本发育系数 The basic development coefficient in sowing to emergence stage	-2.50~-1.00	-1.20	-1.00
P1	播种-出苗阶段温度系数 The temperature coefficient in sowing to emergence stage	0.10~2.20	1.50	2.00
K21	春化作用阶段基本发育系数 The basic development coefficient in vernalization phase	-3.50~--2.00	-1.94	-3.00
P21	春化作用温度系数 The temperature coefficient in vernalization phase	0.10~1.50	1.30	1.50
K22	光周期阶段基本发育系数 The basic development coefficient in photoperiod phase	-3.50~2.00	-1.32	-3.25
P22	光周期阶段温度系数 The temperature coefficient in photoperiod phase	0.10~2.00	1.00	0.10
Q2	光周期阶段光周期系数 The genetic photoperiod coefficient in photoperiod phase	0.10~3.00	1.72	0.66
K3	拔节-抽穗阶段基本发育系数 The basic development coefficient in jointing to heading stage	-3.50~2.00	-3.09	-3.00
P3	拔节-抽穗阶段温度系数 The temperature coefficient in jointing to heading stage	-0.10~2.00	1.97	-0.10
K4	抽穗-成熟阶段基本发育系数 The basic development coefficient in heading to maturity stage	-3.50~-3.00	-3.38	-3.50
P4	抽穗-成熟阶段温度系数 The temperature coefficient in heading to maturity stage	0.10~2.00	1.79	1.44
PA	光-光合作用曲线初始斜率 The initial slope of the light-photosynthesis curve	0.0135~0.0165	0.015	0.016
PMAX	光饱时的最大光合强度/( $k g ? M J - 1$ ) The maximum photosynthetic intensity at light saturation point/( $g ? m - 2 ? h - 1$ )	2.80~4.20	3.00	3.80
TR1	抽穗前茎鞘存储物向籽粒的转运效率 The transfer rate of stem and sheath to grain before headin/( $k g ? k g - 1$ )	0.01~1.00	0.20	0.20
TR2	抽穗后光合产物向籽粒的转运效率 The transfer rate of stem and sheath to grain after heading/(( $k g ? k g - 1$ )	0.10~1.00	0.95	0.90

Table 1

Table 2

Fig.1

Table 3

Table 4

Table 5

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处理 Treatments	方法 Methods	2014	2015
处理 Treatments	方法 Methods	出苗期 Emergence	拔节期 Jointing	抽穗期 Heading	成熟期 Maturity
早播	实测	10月11日	4月8日	4月28日	6月4日
	试错法	10月8日	4月6日	5月6日	6月8日
	PEST	10月8日	4月11日	5月1日	6月8日
中播	实测	10月23日	4月11日	4月30日	6月9日
	试错法	10月18日	4月8日	5月7日	6月8日
	PEST	10月18日	4月11日	5月1日	6月8日

处理 Treatments	方法 Methods	2015	2016
处理 Treatments	方法 Methods	出苗期 Emergence	拔节期 Jointing	抽穗期 Heading	成熟期 Maturity
早播	实测	10月9日	4月7日	4月29日	6月12日
	试错法	10月5日	4月3日	5月4日	6月6日
	PEST	10月5日	4月9日	4月29日	6月5日
中播	实测	10月21日	4月10日	5月3日	6月14日
	试错法	10月15日	4月4日	5月5日	6月6日
	PEST	10月15日	4月11日	5月1日	6月8日

处理 Treatments	方法 Methods	产量 Yield(kg·hm-2)
早播	实测	4733.97
	试错法	5602.40
	PEST	5561.91
中播	实测	5197.71
	试错法	5290.04
	PEST	5205.38

处理 Treatments	方法 Methods	产量 Yield(kg/hm²)
早播	实测	5776.87
	试错法	6065.75
	PEST	6005.50
中播	实测	5638.47
	试错法	5596.61
	PEST	5679.37

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Parameter Adjustment and Optimization Methods for The WheatSM

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