Improving maize growth and development simulation by integrating temperature compensatory effect under plastic film mulching into the AquaCrop model  

作　　者：Chao Zhang Jiying Kong Min Tang Wen Lin Dianyuan Ding Hao Feng 

机构地区：[1]College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou 225009,Jiangsu,China [2]Institute of Water Saving Agriculture in Arid Areas of China,Northwest A&F University,Yangling 712100,Shaanxi,China [3]Collage of Agriculture,Shanxi Agricultural University,Jinzhong 30801,Shanxi,China

出　　处：《The Crop Journal》2023年第5期1559-1568,共10页作物学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (51909228 and 52209071);the “High-level Talents Support Program” of Yangzhou University;“Chunhui Plan” Cooperative Scientific Research Project of Ministry of Education of China (HZKY20220115);the China Postdoctoral Science Foundation (2020M671623);the “Blue Project” of Yangzhou University。

摘　　要：Temperature compensatory effect, which quantifies the increase in cumulative air temperature from soil temperature increase caused by mulching, provides an effective method for incorporating soil temperature into crop models. In this study, compensated temperature was integrated into the AquaCrop model to investigate the capability of the compensatory effect to improve assessment of the promotion of maize growth and development by plastic film mulching(PM). A three-year experiment was conducted from2014 to 2016 with two maize varieties(spring and summer) and two mulching conditions(PM and non-mulching(NM)), and the AquaCrop model was employed to reproduce crop growth and yield responses to changes in NM, PM, and compensated PM. A marked difference in soil temperature between NM and PM was observed before 50 days after sowing(DAS) during three growing seasons. During sowing–emergence and emergence–tasseling, the increase in air temperature was proportional to the compensatory coefficient, with spring maize showing a higher compensatory temperature than summer maize. Simulation results for canopy cover(CC) were generally in good agreement with the measurements, whereas predictions of aboveground biomass and grain yield under PM indicated large underestimates from 60 DAS to the end of maturity. Simulations of spring maize biomass and yield showed general increase based on temperature compensation, accompanied by improvement in modeling accuracy, with RMSEs decreasing from 2.5 to 1.6 t ha^(-1)and from 4.1 t to 3.4 t ha^(-1). Improvement in biomass and yield simulation was less pronounced for summer than for spring maize, implying that crops grown during low-temperature periods would benefit more from the compensatory effect. This study demonstrated the effectiveness of the temperature compensatory effect to improve the performance of the AquaCrop model in simulating maize growth under PM practices.

关 键 词：Plastic film mulching Soil temperature Compensatory effect AquaCrop model Maize growth 

分 类 号：S513[农业科学—作物学]