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Titolo:
Validation of a photosynthesis model through the use of the CO2 balance ofa greenhouse tomato canopy
Autore:
Zekki, H; Gary, C; Gosselin, A; Gauthier, L;
Indirizzi:
Univ Laval, Ctr Rech Hort, Dept Sols & Genie Agroalimentaire, St Foy, PQ G1K 7P4, Canada Univ Laval St Foy PQ Canada G1K 7P4 imentaire, St Foy, PQ G1K 7P4, Canada INRA, Ctr Rech Avignon, Unite Bioclimatol, F-84143 Montfavet, France INRAMontfavet France F-84143 ite Bioclimatol, F-84143 Montfavet, France Univ Laval, Ctr Rech Hort, Dept Phytol, St Foy, PQ G1K 7P4, Canada Univ Laval St Foy PQ Canada G1K 7P4 pt Phytol, St Foy, PQ G1K 7P4, Canada ZAQ Technol Inc, Montreal, PQ H1N 3L7, Canada ZAQ Technol Inc Montreal PQCanada H1N 3L7 , Montreal, PQ H1N 3L7, Canada
Titolo Testata:
ANNALS OF BOTANY
fascicolo: 5, volume: 84, anno: 1999,
pagine: 591 - 598
SICI:
0305-7364(199911)84:5<591:VOAPMT>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
NET PHOTOSYNTHESIS; GROWTH; PLANTS; CROP;
Keywords:
greenhouse; CO2-balance; photosynthesis; TOMGRO model; Acock's model; residuals; tomato Lycopersicon esculentum Mill.;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Gosselin, A Univ Laval, Ctr Rech Hort, Dept Sols & Genie Agroalimentaire, St Foy, PQ G1K 7P4, Canada Univ Laval St Foy PQ Canada G1K 7P4 t Foy, PQ G1K 7P4, Canada
Citazione:
H. Zekki et al., "Validation of a photosynthesis model through the use of the CO2 balance ofa greenhouse tomato canopy", ANN BOTANY, 84(5), 1999, pp. 591-598

Abstract

Several leaf photosynthesis models were developed from well controlled experiments in growth chambers. However, only a few have been validated under greenhouse conditions for their quantitative and qualitative adequacy. In this paper, rates of net photosynthesis for a tomato crop (Lycopersicon esculentum Mill) were measured in a semi-commercial greenhouse (615 m(3)) for asignificant time period. Concomitant measurements of climatic conditions and LAI were used for simulation of net photosynthesis using the TOMGRO model which integrates Acock's model for photosynthesis calculations. From simulations and from sensitivity analysis, the prediction of net photosynthesisappeared to be very sensitive to the quantum use efficiency. The Acock model with original parameters underestimated the net photosynthesis rate, butan increase in the quantum use efficiency by 10% gave a good fit. In an effort to generalize the validity of the model, a residual analysis was performed and showed a systematic bias related to light intensity intercepted bythe canopy. The Marquardt algorithm was used to adjust our data to the model but did not eliminate residual heterogeneity of variance with new parameter values. On the basis of collected data, the criteria of goodness of fitused showed that the photosynthesis model is inadequate in describing the CO2-balance of the greenhouse agrosystem. However, it was determined that it could be used as a submodel within a more complex model for predicting growth and development. (C) 1999 Annals of Botany Company.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 16/07/20 alle ore 19:22:34