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A model of the temperature and solar-radiation effects on spring wheat growth and yield
Year:
1991
Source of publication :
Field Crops Research
Authors :
Amir, Jacob
;
.
Volume :
28
Co-Authors:
Amir, J., Agricultural Research Organization, Gilat Experimental Station, Mobile Post Negev 2, Israel
Sinclair, T.R., USDA-ARS, Agronomy Physiology Lab., University of Florida, Bldg. 164, Gainesville, FL 32611, United States
Facilitators :
From page:
47
To page:
58
(
Total pages:
12
)
Abstract:
A simple mechanistic model was developed to analyze the effects of temperature and solar radiation on spring wheat (Triticum aestivum L.). This model uses relatively few, conservative relationships to define leaf-area development as a function of temperature, biomass accumulation as a function of intercepted radiation, and seed growth as calculated from a linear increase in harvest index with time. Using daily weather observations of solar radiation, minimum temperature, and maximum temperature over a 10-year period at Gilat, Israel, a comparison of yields between model simulations and field observations was made. The simulations highlighted the influence of temperature on the development of crop leaf area, accumulated biomass, and grain-yields. Temperature especially influenced the duration of ontogenetic events, with cool temperature being clearly advantageous for increasing environmental yield potential of wheat. For unstressed wheat crops, the simple, mechanistic model accounted for much of the variability in grain-yield among seasons. © 1991.
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DOI :
10.1016/0378-4290(91)90073-5
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
30614
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:56
Scientific Publication
A model of the temperature and solar-radiation effects on spring wheat growth and yield
28
Amir, J., Agricultural Research Organization, Gilat Experimental Station, Mobile Post Negev 2, Israel
Sinclair, T.R., USDA-ARS, Agronomy Physiology Lab., University of Florida, Bldg. 164, Gainesville, FL 32611, United States
A model of the temperature and solar-radiation effects on spring wheat growth and yield
A simple mechanistic model was developed to analyze the effects of temperature and solar radiation on spring wheat (Triticum aestivum L.). This model uses relatively few, conservative relationships to define leaf-area development as a function of temperature, biomass accumulation as a function of intercepted radiation, and seed growth as calculated from a linear increase in harvest index with time. Using daily weather observations of solar radiation, minimum temperature, and maximum temperature over a 10-year period at Gilat, Israel, a comparison of yields between model simulations and field observations was made. The simulations highlighted the influence of temperature on the development of crop leaf area, accumulated biomass, and grain-yields. Temperature especially influenced the duration of ontogenetic events, with cool temperature being clearly advantageous for increasing environmental yield potential of wheat. For unstressed wheat crops, the simple, mechanistic model accounted for much of the variability in grain-yield among seasons. © 1991.
Scientific Publication
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