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MODELLING EFFECTS OF CLIMATE ON CROP PRODUCTIVITY

Objective

EVALUATION OF CROP PRODUCTIVITY IN RESPONSE TO CLIMATIC CHANGE.

THE EFFECT OF THE CLIMATIC FACTORS TEMPERATURE, DAYLENGHTHAND LIGHT INTENSITY ON PHYSIOLOGICAL PROCESSES WILL BE STUDIED IN CLIMATE ROOMS. THE PHYSIOLOGICAL PROCESSES STUDIED CONCERN, CO2-ASSIMILITION, TRANSPIRATION, RESPIRATION AND STOMATAL BEHAVIOUR. THE MORPHOGENETIC PROCESSES STUDIED WILL BE : LEAF APPEARANCE RATE, LEAF EXTENSION RATE, STEM ELONGATION RATE, TILLER AND BRANCHES FORMATION AND FLOWER INITIATION. THE RELATION BETWEEN THE RATE OF THESE MORPHOGENETIC PROCESSES AND CLIMATIC FACTORS SUCH AS TEMPERATURE AND CO2-CONCENTRATION WILL BE QUANTIFIED FOR THE CROPS MAIZE, SUGARBEET AND WHEAT FOR SOME IMPORTANT WEED SPECIES (CHENOPODIUM ALBUM, AVENA FATUA, ECHINOCHLOA CRUS GALLI).

A SUBMODEL OF MORPHOGENESIS OF WEEDS WILL BE ADDED TO THE PHYSIOLOGICAL CROP GROWTH MODEL SUCROS (SIMPLE UNIVERSAL CROP SIMULATION), USING LITERATURE DATA AND EXPERIMENTALLY DETERMINED RELATIONS. THE MODEL WILL BE VALIDATED AND TESTED WITH THE RESULTS OF FIELD EXPERIMENTS WHICH HAVE BEEN CARRIED OUT WITH MAIZE, ECHINOCHLOA, BARNYARD GRASS, SUGARBEET AND CHENOPODIUM. ADDITIONAL DATA SETS FOR FURTHER VALIDATION OF THE MODEL WILL BE OBTAINED FROM FIELD EXPERIMENTS CARRIED OUT AT WAGENINGEN AND FLORENCE. THE MODEL WILL SUBSEQUENTLY BE EXTENDED FOR COMPETITION STUDIES. THIS CROP WEED COMPETITION MODEL CAN BE TESTED WITH THE FIELD EXPERIMENTAL DATA ON MIXTURES AVAILABLE FROM VARIOUS PLACES IN EUROPE, FLORENCE, STUTTGART AND WAGENINGEN.

THE THOROUGHLY TESTED MODEL IS USED FOR SENSITIVITY ANALYSES AND WILL HELP TO DERIVE DAMAGE RELATIONSHIPS FOR VARIOUS WEEDS UNDER DIFFERENT CONDITIONS.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

LANDBOUWHOGESCHOOL WAGENINGEN
Address
Salverdaplein 10
6701 DB Wageningen
Netherlands

Participants (3)

CESIA ACADEMIA D GEORGOFILI
ROTHAMSTED EXPERIMENTAL STATION
UNIVERSITAET HOHENHEIM