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Titolo:
Modeling temperature- and radiation-driven leaf area expansion in the contrasting crops potato and wheat
Autore:
van Delden, A; Kropff, MJ; Haverkort, AJ;
Indirizzi:
Univ Wageningen & Res Ctr, Crop & Weed Ecol Grp, NL-6708 AK Wageningen, Netherlands Univ Wageningen & Res Ctr Wageningen Netherlands NL-6708 AK Netherlands Plant Res Int, NL-6700 AA Wageningen, Netherlands Plant Res Int Wageningen Netherlands NL-6700 AA Wageningen, Netherlands
Titolo Testata:
FIELD CROPS RESEARCH
fascicolo: 2, volume: 72, anno: 2001,
pagine: 119 - 142
SICI:
0378-4290(20010912)72:2<119:MTARLA>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
LIGHT INTERCEPTION; GROWTH SIMULATION; NITROGEN UPTAKE; WINTER-WHEAT; SPRING WHEAT; DRY-MATTER; YIELD; OPTIMIZATION; COMPETITION;
Keywords:
Solanum tuberosum L.; Triticum aestivum L.; leaf area index; simulation; summary models;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
57
Recensione:
Indirizzi per estratti:
Indirizzo: van Delden, A Univ Wageningen & Res Ctr, Crop & Weed Ecol Grp, POB 430, NL-6708 AK Wageningen, Netherlands Univ Wageningen & Res Ctr POB 430 Wageningen Netherlands NL-6708 AK
Citazione:
A. van Delden et al., "Modeling temperature- and radiation-driven leaf area expansion in the contrasting crops potato and wheat", FIELD CR RE, 72(2), 2001, pp. 119-142

Abstract

The performance of a model for simulating increase in leaf area index (L) was evaluated for potato (Solanum tuberosum L.) and wheat (Triticum aestivum L.) cultivars across environments (years and sites). Rate of L expansion just after emergence was assumed to depend on temperature. After a predefined L, L-s, expansion was assumed to increase in proportion to leaf dry weight increase that depended on intercepted radiation, henceforward: radiation-limited expansion. The L-s value at which the model performed best was considered to be the most realistic L at which expansion shifts from temperature to radiation-limitation. An L-s value of zero leads to solely radiation-limited expansion, whereas a value larger than maximum L leads to solely temperature-limited expansion. The criteria used to evaluate the model were constancy of calibrated model parameters across environments, and predictiveability. For potato and wheat, parameters were most robust across environments, when L-s was neither zero nor at maximum L. Model parameters did not vary with genotype. The model's predictions were best at an L-s of 1.0 for potato and 1.5 for wheat. Using these L-s values, the coefficient of determination between observed and predicted values was 91% for potato and 88% for wheat. Sensitivity analysis revealed that smaller L-s values led to larger changes in rate of leaf area expansion and crop dry weight than larger values did. Crop dry weight was hardly affected by an increase in L-s. Implications of the results for modeling are discussed. (C) 2001 Elsevier ScienceB.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/10/20 alle ore 04:51:04