摘要
通过评价AquaCrop模型对马铃薯的生长发育、土壤水分动态变化、产量及水分利用效率的模拟效果,为AquaCrop模型在宁夏中部干旱带马铃薯种植的应用提供科学方法和理论依据.试验设置5d、7d、10d、13d和15d共5个灌水周期,于2018年在宁夏中部干旱带进行田间试验,对马铃薯冠层覆盖度、地上生物量、土壤储水量、产量及其构成指标进行测定.结果表明,AquaCrop模型可较好地模拟马铃薯冠层覆盖度的变化、地上生物量和土壤储水量,其实测值和模拟值的相对误差(RE)为0.06%~7.51%、0.95%~13.33%和0.15%~4.35%,均方根误差(RMSE)为1.04%~3.36%、0.092~0.335t/hm2、1.68~4.1mm;马铃薯产量实测值和模拟值RE为0.10%~2.22%,RMSE为294.45kg/hm2,腾发量和水分利用效率等指标的模拟也有类似的结果,表现出较好的一致性,但AquaCrop模型在灌水量较大或者较小时对各指标的模拟效果较差.总体来看,AquaCrop模型对各指标的模拟结果均较好,其结果可作为马铃薯适宜生长区域划分及特定条件下产量的预测.
The objective of this paper is to provide scientific methods and theortical basis for the application of the AquaCrop model in potato planting in the arid zones of central Ningxia province through evaluating this model’s simulated effect on potato growth,dynamic variation of soil moisture,yield and water use efficiency.Five irrigation cycles(5 d,7d,10 d,13 d and 15 d)were set up in this experimentation.And a field experiment was conducted in the arid zones of central Ningxia province in 2018 for measuring potato canopy coverage,overground biomass,soil water storage,yield and other composition indexes.The AquaCrop model well simulated the change of potato canopy coverage.And the relative error(RE)between the measured and simulated values was from 0.06%to 7.51%,and root-mean-square error(RMSE)was 1.04%to 3.36%.This model also better simulated the overground biomass and soil water storage.RE between measured and simulated values of overground biomass was 0.95%to 13.33%,and the RMSE was 0.092 t/hm 2 to 0.335 t/hm 2.RE between measured and simulated values of soil water storage was between 0.15%and 4.35%,and its RMSE was 1.68 mm to 4.1 mm.RE between measured and simulated values of potato yield was 0.10%to 2.22%,and the RMSE was 294.45 kg/hm 2.Besides,the simulation results of other composition indexes were similar to above and showed good consistency.However,the simulation effect of the AquaCrop model is poor on each index when the irrigation volume lager or smaller.Overall,the simulation results of the AquaCrop model showed good effect on each index,and the results can be used to select the suitable growth areas and yield prediction of potato under the specific conditions.
作者
金建新
黄建成
桂林国
JIN Jianxin;HUANG Jiancheng;GUI Linguo(Institute of Agricultural Resources and Environment,Ningxia Academy of Agriculture and Forestry,Yinchuan 750002,China)
出处
《西北农业学报》
CAS
CSCD
北大核心
2019年第8期1250-1258,共9页
Acta Agriculturae Boreali-occidentalis Sinica
基金
宁夏回族自治区全产业链项目(YES-16-0103)
宁夏回族自治区自然科学项目(2018AAC03280)
宁夏科技人才托举工程项目~~
