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Challenges for Simulating Growth and Phenology of Silage Maize in a Nordic Climate with APSIM

Morel, Julien and Parsons, David and Halling, Magnus and Kumar, Uttam and Peake, Allan and Bergkvist, Göran and Brown, Hamish and Hetta, Mårten (2020). Challenges for Simulating Growth and Phenology of Silage Maize in a Nordic Climate with APSIM. Agronomy. 10 , 645 , 1-18
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Abstract

APSIM Next Generation was used to simulate the phenological development and biomass production of silage maize for high latitudes (i.e., >55 degrees). Weather and soil data were carefully specified, as they are important drivers of the development and growth of the crop. Phenology related parameters were calibrated using a factorial experiment of simulations and the minimization of the root mean square error of observed and predicted phenological scaling. Results showed that the model performed well in simulating the phenology of the maize, but largely underestimated the production of biomass. Several factors could explain the discrepancy between observations and predictions of above-ground dry matter yield, such as the current formalization of APSIM for simulating the amount of radiation absorbed by the crop at high latitudes, as the amount of diffuse light and intercepted light increases with latitude. Another factor that can affect the accuracy of the predicted biomass is the increased duration of the day length observed at high latitudes. Indeed, APSIM does not yet formalize the effects of extreme day length on the balance between photorespiration and photosynthesis on the final balance of biomass production. More field measurements are required to better understand the drivers of the underestimation of biomass production, with a particular focus on the light interception efficiency and the radiation use efficiency.

Authors/Creators:Morel, Julien and Parsons, David and Halling, Magnus and Kumar, Uttam and Peake, Allan and Bergkvist, Göran and Brown, Hamish and Hetta, Mårten
Title:Challenges for Simulating Growth and Phenology of Silage Maize in a Nordic Climate with APSIM
Year of publishing :2020
Volume:10
Article number:645
Number of Pages:18
Publisher:MDPI
ISSN:2073-4395
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
Keywords:APSIM model, silage maize, radiation use efficiency, biomass, light interception efficiency, calibration
URN:NBN:urn:nbn:se:slu:epsilon-p-106898
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-106898
Additional ID:
Type of IDID
DOI10.3390/agronomy10050645
Web of Science (WoS)000541750900138
ID Code:17326
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
VH - Faculty of Veterinary Medicine and Animal Science
Department:(NL, NJ) > Dept. of Crop Production Ecology
(NL, NJ) > Dept. of Agricultural Research for Northern Sweden
(VH) > Dept. of Agricultural Research for Northern Sweden
Deposited By: SLUpub Connector
Deposited On:25 Aug 2020 11:49
Metadata Last Modified:25 Aug 2020 11:49

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