Effects of winter wheat N status on assimilate and N partitioning in the mechanistic agroecosystem model DAISY

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Standard

Effects of winter wheat N status on assimilate and N partitioning in the mechanistic agroecosystem model DAISY. / Gyldengren, Jacob Glerup; Abrahamsen, Per; Olesen, Jørgen E.; Styczen, Merete; Hansen, Søren; Gislum, René.

I: Journal of Agronomy and Crop Science, Bind 206, Nr. 6, 2020, s. 784-805.

Publikation: Bidrag til tidsskriftTidsskriftartikelfagfællebedømt

Harvard

Gyldengren, JG, Abrahamsen, P, Olesen, JE, Styczen, M, Hansen, S & Gislum, R 2020, 'Effects of winter wheat N status on assimilate and N partitioning in the mechanistic agroecosystem model DAISY', Journal of Agronomy and Crop Science, bind 206, nr. 6, s. 784-805. https://doi.org/10.1111/jac.12412

APA

Gyldengren, J. G., Abrahamsen, P., Olesen, J. E., Styczen, M., Hansen, S., & Gislum, R. (2020). Effects of winter wheat N status on assimilate and N partitioning in the mechanistic agroecosystem model DAISY. Journal of Agronomy and Crop Science, 206(6), 784-805. https://doi.org/10.1111/jac.12412

Vancouver

Gyldengren JG, Abrahamsen P, Olesen JE, Styczen M, Hansen S, Gislum R. Effects of winter wheat N status on assimilate and N partitioning in the mechanistic agroecosystem model DAISY. Journal of Agronomy and Crop Science. 2020;206(6):784-805. https://doi.org/10.1111/jac.12412

Author

Gyldengren, Jacob Glerup ; Abrahamsen, Per ; Olesen, Jørgen E. ; Styczen, Merete ; Hansen, Søren ; Gislum, René. / Effects of winter wheat N status on assimilate and N partitioning in the mechanistic agroecosystem model DAISY. I: Journal of Agronomy and Crop Science. 2020 ; Bind 206, Nr. 6. s. 784-805.

Bibtex

@article{8b9c996e160c4e86a2591a46e8943d13,
title = "Effects of winter wheat N status on assimilate and N partitioning in the mechanistic agroecosystem model DAISY",
abstract = "Nitrogen (N) management in modern farming needs to balance the interests of yield quantity and quality with environmental impact of reactive N lost to the atmosphere and aquatic environments. Mechanistic agroecosystem models are useful tools to analyse the combined effects of management options and natural conditions, including soil fertility and climate, site-specific optimal N application rates and environmental impact. An important component of the system description is the crop module, including the responses to N status and N stress. To improve the description of crop growth response to N status in the DAISY model system, we implemented an empirical model for N status effects in winter wheat on the partitioning of assimilated dry matter and N between leaves and stems, originally described by Ratjen and Kage (Journal of Agronomy and Crop Science, 2016, 202, 576s). To our knowledge, this mechanism has not been included in any of the most widespread and commonly used mechanistic agroecosystem models. We tested and compared the model performancewith and without the new N status response against data from a two-seasonwinter wheat experiment in Denmark, where crop growth and partitioning of drymatter and N were measured. Implementation of the new N status response function improved model performance and ensured a more robust crop growth description, especially in scenarios with periods of low crop N status or N stress. The mechanism mimics an adaptation strategy, where the crop balances N stress and growth potential by dynamically adjusting the leaf-stem ratio and thereby N demand. This behaviour opens a discussion regarding the empirical concept of a biomass driven critical N curve.",
keywords = "Faculty of Science, critical N dilution curve, crop physiology, dynamic modelling, nitrogen status, nitrogen stress, Winter wheat",
author = "Gyldengren, {Jacob Glerup} and Per Abrahamsen and Olesen, {J{\o}rgen E.} and Merete Styczen and S{\o}ren Hansen and Ren{\'e} Gislum",
year = "2020",
doi = "10.1111/jac.12412",
language = "English",
volume = "206",
pages = "784--805",
journal = "Journal of Agronomy and Crop Science",
issn = "0931-2250",
publisher = "Wiley-Blackwell",
number = "6",

}

RIS

TY - JOUR

T1 - Effects of winter wheat N status on assimilate and N partitioning in the mechanistic agroecosystem model DAISY

AU - Gyldengren, Jacob Glerup

AU - Abrahamsen, Per

AU - Olesen, Jørgen E.

AU - Styczen, Merete

AU - Hansen, Søren

AU - Gislum, René

PY - 2020

Y1 - 2020

N2 - Nitrogen (N) management in modern farming needs to balance the interests of yield quantity and quality with environmental impact of reactive N lost to the atmosphere and aquatic environments. Mechanistic agroecosystem models are useful tools to analyse the combined effects of management options and natural conditions, including soil fertility and climate, site-specific optimal N application rates and environmental impact. An important component of the system description is the crop module, including the responses to N status and N stress. To improve the description of crop growth response to N status in the DAISY model system, we implemented an empirical model for N status effects in winter wheat on the partitioning of assimilated dry matter and N between leaves and stems, originally described by Ratjen and Kage (Journal of Agronomy and Crop Science, 2016, 202, 576s). To our knowledge, this mechanism has not been included in any of the most widespread and commonly used mechanistic agroecosystem models. We tested and compared the model performancewith and without the new N status response against data from a two-seasonwinter wheat experiment in Denmark, where crop growth and partitioning of drymatter and N were measured. Implementation of the new N status response function improved model performance and ensured a more robust crop growth description, especially in scenarios with periods of low crop N status or N stress. The mechanism mimics an adaptation strategy, where the crop balances N stress and growth potential by dynamically adjusting the leaf-stem ratio and thereby N demand. This behaviour opens a discussion regarding the empirical concept of a biomass driven critical N curve.

AB - Nitrogen (N) management in modern farming needs to balance the interests of yield quantity and quality with environmental impact of reactive N lost to the atmosphere and aquatic environments. Mechanistic agroecosystem models are useful tools to analyse the combined effects of management options and natural conditions, including soil fertility and climate, site-specific optimal N application rates and environmental impact. An important component of the system description is the crop module, including the responses to N status and N stress. To improve the description of crop growth response to N status in the DAISY model system, we implemented an empirical model for N status effects in winter wheat on the partitioning of assimilated dry matter and N between leaves and stems, originally described by Ratjen and Kage (Journal of Agronomy and Crop Science, 2016, 202, 576s). To our knowledge, this mechanism has not been included in any of the most widespread and commonly used mechanistic agroecosystem models. We tested and compared the model performancewith and without the new N status response against data from a two-seasonwinter wheat experiment in Denmark, where crop growth and partitioning of drymatter and N were measured. Implementation of the new N status response function improved model performance and ensured a more robust crop growth description, especially in scenarios with periods of low crop N status or N stress. The mechanism mimics an adaptation strategy, where the crop balances N stress and growth potential by dynamically adjusting the leaf-stem ratio and thereby N demand. This behaviour opens a discussion regarding the empirical concept of a biomass driven critical N curve.

KW - Faculty of Science

KW - critical N dilution curve

KW - crop physiology

KW - dynamic modelling

KW - nitrogen status

KW - nitrogen stress

KW - Winter wheat

U2 - 10.1111/jac.12412

DO - 10.1111/jac.12412

M3 - Journal article

VL - 206

SP - 784

EP - 805

JO - Journal of Agronomy and Crop Science

JF - Journal of Agronomy and Crop Science

SN - 0931-2250

IS - 6

ER -

ID: 241583489