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Experimental evaluation of a crop growth simulation model. A case study with rhodes grass
Year:
1981
Source of publication :
Agro-Ecosystems
Authors :
Dayan, Ehud
;
.
Volume :
7
Co-Authors:
Dayan, E., Faculty of Agriculture, Hebrew University, Postbox 12, Rehovot, Israel
van Keulen, H., Centre for Agrobiological Research, Postbox 14, 6700 AA Wageningen, Netherlands
Dovrat, A., Faculty of Agriculture, Hebrew University, Postbox 12, Rehovot, Israel
Facilitators :
From page:
113
To page:
126
(
Total pages:
14
)
Abstract:
The crop growth simulation model BACROS describing production under optimum conditions of water and nutrient supply, is tested with data collected in field experiments with Rhodes grass (Chloris gayana Kunth). The choice of specific parameters for the plant species is discussed and special attention is paid to stomatal behaviour. It was concluded that in all situations examined (climate room, greenhouse and field), stomatal aperture was determined by the CO2 concentration inside the stomatal cavity and hence by the rate of assimilation. Measured and calculated rates of assimilation, respiration and transpiration of an artificial sward showed good agreement. In the field situation the maximum rate of dry matter accumulation was predicted with reasonable accuracy as was the rate of water use. Initial growth rates and the rate of growth towards the end of the growing period showed deviations. The former inaccuracies were associated with the death of tillers, the latter with the formation of flowering stems. © 1981.
Note:
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DOI :
10.1016/0304-3746(81)90025-1
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
29162
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:44
Scientific Publication
Experimental evaluation of a crop growth simulation model. A case study with rhodes grass
7
Dayan, E., Faculty of Agriculture, Hebrew University, Postbox 12, Rehovot, Israel
van Keulen, H., Centre for Agrobiological Research, Postbox 14, 6700 AA Wageningen, Netherlands
Dovrat, A., Faculty of Agriculture, Hebrew University, Postbox 12, Rehovot, Israel
Experimental evaluation of a crop growth simulation model. A case study with rhodes grass
The crop growth simulation model BACROS describing production under optimum conditions of water and nutrient supply, is tested with data collected in field experiments with Rhodes grass (Chloris gayana Kunth). The choice of specific parameters for the plant species is discussed and special attention is paid to stomatal behaviour. It was concluded that in all situations examined (climate room, greenhouse and field), stomatal aperture was determined by the CO2 concentration inside the stomatal cavity and hence by the rate of assimilation. Measured and calculated rates of assimilation, respiration and transpiration of an artificial sward showed good agreement. In the field situation the maximum rate of dry matter accumulation was predicted with reasonable accuracy as was the rate of water use. Initial growth rates and the rate of growth towards the end of the growing period showed deviations. The former inaccuracies were associated with the death of tillers, the latter with the formation of flowering stems. © 1981.
Scientific Publication
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