摘要
为模拟研究小麦生长过程中生物量的影响因素,运用WOFOST作物模型,筛选模型的敏感性参数,设计15种模拟情景,利用情景分析与系统分析方法,模拟与评价了土壤中水分养分对小麦生物量的影响。结果表明:WOFOST模型中有6个参数敏感性指数均超过0.1,极为敏感,包括在20℃下的单叶有效光能利用率(EFFTB3)、生育期(DVS)指数设为0.0和0.5时的比叶面积(SLATB1和SLATB2)、从出苗到开花阶段的累积温度(TSUM1)、30℃下的最大CO2同化率(TMPF4)以及在35℃下的叶面积生长周期(SPAN)。按照养分缺乏、养分正常、养分充足3个情景下模拟小麦生物量指标叶面积指数(LAI)、地上总生物量(TAGP)与贮藏器官总干重质量(TWSO),得到土壤养分对小麦生物量的影响较小,土壤水分对小麦生物量影响较大。根据模拟结果得到每米土壤深度的有效含水量AWC的饱和值为190(kg·m-^1),小麦生物量随水分增加而增加,但当水分达到饱和时,增加水分对小麦生物量影响不大。本研究可为WOFOST小麦模型的参数优化和区域应用,以及定量模拟土壤水分与养分对小麦生物量的影响提供理论依据和方法。
In order to simulate and study the affecting factors for the biomass of wheat in its growth process, 15 scenarios were designed using the WOFOST crop model, and the sensitivity parameters of the model were screened to simulate and evaluate the influence of soil moisture nutrients on wheat biomass using scenario analysis and systematic analysis. The results showed that 6 parameters in WOFOST model were extremely sensitive with sensitive indices above 0.1, including the effective light energy utilization rate of single leaf under 20℃(EFFTB3), relative leaf area at 0.0 and 0.5 of set growth stages index(SLATB1 and SLATB2), accumulated temperature from seedling to flowering stage(TSUM1), maximum CO2 assimilation rate at 30 ℃(TMPF4), and growth cycle of leaf area at 35 ℃(SPAN).It was verified that these 6 parameters in WOFOST wheat model.LAI, TAGP and TWSO were simulated for biomass indicators under the condition of nutrient deficiency, normal nutrient and nutrient fertility, and it was concluded that soil nutrients had little impact on wheat biomass, while soil moisture had a greater impact on wheat biomass. Based on simulation results, the saturation value of AWC was 190(kg·m-^1), and the wheat yield increased with the increase of soil water, but when water reaches saturation value, the increase of water has little effect on the wheat yield. This study can provide a scientific theoretical basis for parameter optimization and regional application of WOFOST wheat model, as well as quantitative simulation of the influence of soil water and nutrient on wheat yield.
作者
王学梅
朱雅莉
董世杰
王凤文
文想成
张庆国
WANG Xuemei;ZHU Yali;DONG Shijie;WANG Fengwen;WEN Xiangcheng;ZHANG Qingguo(School of Resources and Environment,Anhui Agricultural University,Hefei 230036;Anhui Meteorological Bureau,Hefei,230021;School of Science,Anhui Agricultural University,Hefei 230036;Lu’an Meteorological Bureau,Lu’an 237011)
出处
《安徽农业大学学报》
CAS
CSCD
2020年第2期267-274,共8页
Journal of Anhui Agricultural University
基金
国家重点基础研究发展计划(2016YFD0300205-03)
安徽省学术和技术带头人及后备人选学术科研课题(2016H072)共同资助。
