Coupling a Pest and Disease Damage Module with CSM-NWheat: A Wheat Crop Simulation Model

IF 1.4 4区 农林科学 Q3 AGRICULTURAL ENGINEERING
Thiago Berton Ferreira, W. Pavan, J. M. Fernandes, S. Asseng, F. Oliveira, Carlos Amaral Ho¨lbig, D. Pequeno, G. A. Dalmago, A. L. Zanatta, G. Hoogenboom
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引用次数: 2

Abstract

HighlightsCSM-NWheat, a DSSAT wheat crop model, was coupled with a pest module named PEST.The coupled model can simulate the impact of pest and disease damage on wheat crops.Pest damage is expressed in daily steps by communication links called coupling points.Coupling points are linked with state variables at which pest damage can be applied.Field pest-scouting reports and linear interpolation are used to compute damage rates.Abstract. Wheat is one of the most important global staple crops and is affected by numerous pests and diseases. Depending on their intensity, pests and diseases can cause significant economic losses and even crop failures. Pest models can assist decision-making, thus helping reduce crop losses. Most wheat simulation models account for abiotic stresses such as drought and nutrients, but they do not account for biotic stresses caused by pests and diseases. Therefore, the objective of this study was to couple a dynamic pest and disease damage module to the DSSAT model CSM-NWheat. Coupling points were integrated into the CSM-NWheat model for applying daily damage to all plant components, including leaves, stems, roots, and grains, the entire plant, and to the assimilate supply. The coupled model was tested by simulating a wheat crop with virtual damage levels applied at each coupling point. Measured foliar damage caused by tan spot (Pyrenophora tritici-repentis) was also simulated. The modified model accurately estimated the reduction in leaf area growth and the yield loss when compared with observed data. With the incorporation of the pest module, CSM-NWheat can now predict the potential impact of pests and diseases on wheat growth and development, and ultimately economic yield. Keywords: Biotic stress, Decision support, DSSAT, Model coupling, Yield loss.
与CSM-NWheat耦合的病虫害损害模块:一个小麦作物模拟模型
DSSAT小麦作物模型scsm - nwheat与害虫模块pest耦合。该耦合模型可以模拟病虫害对小麦作物的影响。害虫的损害是通过称为耦合点的通信链路按日常步骤表示的。耦合点与状态变量相关联,在状态变量处可以施加虫害损害。利用田间害虫侦察报告和线性插值计算危害率。小麦是全球最重要的主粮作物之一,受到多种病虫害的影响。病虫害的严重程度不同,可能造成重大经济损失,甚至导致作物歉收。病虫害模型可以协助决策,从而有助于减少作物损失。大多数小麦模拟模型考虑了干旱和营养等非生物胁迫,但它们没有考虑病虫害引起的生物胁迫。因此,本研究的目的是将动态病虫害损害模块耦合到DSSAT模型CSM-NWheat上。耦合点被整合到cm - nwheat模型中,用于应用对所有植物成分的日损害,包括叶、茎、根和谷物,整个植物以及同化物的供应。通过对小麦作物的模拟试验,对耦合模型进行了验证。还模拟了黄斑病(Pyrenophora tritrii -repentis)引起的叶片损伤。与观测数据相比,修正后的模型准确地估计了叶面积生长减少和产量损失。随着病虫害模块的整合,cms - nwheat现在可以预测病虫害对小麦生长发育的潜在影响,并最终预测经济产量。关键词:生物胁迫,决策支持,DSSAT,模型耦合,产量损失
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来源期刊
Transactions of the ASABE
Transactions of the ASABE AGRICULTURAL ENGINEERING-
CiteScore
2.30
自引率
0.00%
发文量
0
审稿时长
6 months
期刊介绍: This peer-reviewed journal publishes research that advances the engineering of agricultural, food, and biological systems. Submissions must include original data, analysis or design, or synthesis of existing information; research information for the improvement of education, design, construction, or manufacturing practice; or significant and convincing evidence that confirms and strengthens the findings of others or that revises ideas or challenges accepted theory.
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