摘要
利用2009—2010年北京地区潮土茄田定位试验资料和气象、土壤及栽培管理措施等资料,采用SMCR__N蔬菜作物模型对北京地区潮土紫长茄和圆茄产量及圆茄吸氮量进行了模拟,校正模型参数并对模型进行了初步评价,为模型本地化提供参考。结果表明:SMCR__N模型中茄子品种参数适用于模拟北京地区潮土紫长茄产量,其模拟总干重的均方根差(RMSE)为0.42t·hm-2,标准化均方根差(n-RMSE)为0.06,模型预测效率(EF)为0.95,E=0.40>0.00,拟合指数(d)为0.99,决定系数(R2)=0.96。定位试验的圆茄品种与SMCR__N模型茄子品种参数存在差异,需调整相关茄子品种参数值。作物总干重敏感性分析表明,作物生长系数(K1)为SMCR__N模型敏感性参数,当K1=1.4t·hm-2时,模型模拟性能最好,RMSE=1.2t·hm-2,n-RMSE=0.12,EF=0.59,E=0.76,d=0.93,R2=0.80。参数校正后,对2010年北京地区潮土圆茄的吸氮量进行了模拟,R2=0.85,模拟性能良好。通过校准作物参数,SMCR__N模型可较准确地模拟北京地区潮土露地茄子总干重和吸氮量的动态变化,适用性较强,可用于指导北京地区潮土茄田的施氮水平,为合理施肥提供科学依据。
To provide a reference for regional application of SMCR_N （Simulation Model for Crop Response toNitrogen fertilizer） model in alluvial region of Beijing ,it has been used to simulate the yields of purple long- andround-eggplants as well as the amount of N uptake by round-eggplants using the location experiment, meteorologi-cal and cultivating management data in the eggplant field with alluvial soil in Beijing from 2009 to 2010. The pa-rameters of the model were calibrated using data from this experiment. The performance of the model was evalua-ted with experimental data as well. The results show that the original eggplant parameters in SMCR_N model canbe directly applied to simulate the yield of purple long-eggplants growing in alluvial region of Beijing. The simula-ting results indicate that RMSE （ Root Mean Square Error）, n-RMSE （ normalized Root Mean Square Error）, EF（ model prediction Efficiency ）, E, d （ fitting index ）, and R2 （ determination coefficient ） are 0. 42 t·hm-2,0. 06 t·hm-2,0. 95,0. 40,0. 99,0. 96 ,respectively. The cultivar of round-eggplant used in the location experimentis different from that in SMCR_N model. So, the corresponding parameters in SMCR_N model need to be adjus-ted. The sensitivity analyses show that simulation results are sensitive to crop growth parameter （ K1 ） . When K1 isadjusted to 1.4, the simulating result of dry weight is more accurate, with RMSE, n-RMSE, EF, E, d, R2 of1.2 t·hm-2 ,0. 12 t·hm-2,0. 59,0. 76,0. 93,0. 80 ,respectively. After calibrating model parameters,the SMCR_Nmodel can be also used to simulate the N uptake by round-eggplants. The simulating results are satisfactory, withR2 of 0. 85. In conclusion,the variations of total dry weight and N uptake by eggplants in alluvial region of Beijingcan be well simulated through calibrating the parameters in SMCR_N model. The SMCR_N model can be appliedto guide a reasonable fertilization for eggplant fields in alluvial region of Beijing.
出处
《气象与环境学报》
2016年第4期106-112,共7页
Journal of Meteorology and Environment
基金
国家自然科学基金(41301553
41473004)
中央级公益性科研院所基本科研业务费专项资金(BSRF201304)共同资助
