cost 734, 3-rd mcm clivagri - poznan, poland stsm on calibration and verification of wofost...

COST 734, 3-rd MCM CLIVAGRI COST 734, 3-rd MCM CLIVAGRI - Poznan, Poland - Poznan, Poland

STSM on Calibration and Verification of WOFOST simulation crop model

Dr Valentin KAZANDJIEV“Agrometeorology” Division

NIMH - BAS


STSM in University of Natural Resources and Applied Life Sciences (BOKU) - ViennaSTSM in University of Natural Resources and Applied Life Sciences (BOKU) - Vienna

Time:Time: 16 – 23 April 2007 was realized STSM for two specialists 16 – 23 April 2007 was realized STSM for two specialists from from BulgariaBulgaria

Place:Place: University of Natural Resources and Applied Life Sciences University of Natural Resources and Applied Life Sciences (BOKU) - Vienna, Austria(BOKU) - Vienna, Austria

Topics:Topics: 1.Calibration and Verification of WOFOST simulation crop 1.Calibration and Verification of WOFOST simulation crop model model with Bulgarian data; with Bulgarian data;

2. Crop simulation models as a tool for climate variability and 2. Crop simulation models as a tool for climate variability and

change impacts investigation on cropschange impacts investigation on crops



Aim of the visit is to increase and elaborate knowledge Aim of the visit is to increase and elaborate knowledge applying the WOFOST model, part of the Crop Growth applying the WOFOST model, part of the Crop Growth Monitoring System (CGMS) in Europe. In the process of Monitoring System (CGMS) in Europe. In the process of training the applicants is expected to tune, calibrate and training the applicants is expected to tune, calibrate and verify the verify the WOFOSTWOFOST model parameters connected with model parameters connected with limiting factors such as water and nutrients, soil type, rain limiting factors such as water and nutrients, soil type, rain

conditions, crop parameters etc.conditions, crop parameters etc.



During the last fifteen years more and more extreme values During the last fifteen years more and more extreme values of temperatures and rainfalls as well as related hydro-of temperatures and rainfalls as well as related hydro-thermal conditions have been observed. Droughts and thermal conditions have been observed. Droughts and floods in large regions of Europe are important and floods in large regions of Europe are important and limitation factors for growth, development and yield limitation factors for growth, development and yield formation of main crops. From this point of view different formation of main crops. From this point of view different unfavorable weather conditions will be simulated and then unfavorable weather conditions will be simulated and then the obtained results will be analyzed. An attempt for the obtained results will be analyzed. An attempt for establishment of relationships between some climatic and establishment of relationships between some climatic and hydro-thermal indices and the phenological development of hydro-thermal indices and the phenological development of winter wheat, barley, maize, sunflower and soybean will be winter wheat, barley, maize, sunflower and soybean will be done. The influence of sowing dates to the harvest results done. The influence of sowing dates to the harvest results will be also investigated. Climate variability and climate will be also investigated. Climate variability and climate change are important conditions for building of a new change are important conditions for building of a new strategy for agriculture. In connection with this peculiarity strategy for agriculture. In connection with this peculiarity climatic scenarios will be applied to various simulations climatic scenarios will be applied to various simulations analyzing their effects.analyzing their effects.



EFFTBEFFTB Initial light-use efficiency of CO2 assimilation of single leaves as Initial light-use efficiency of CO2 assimilation of single leaves as function of daily temperature ((kg•ha-1• hr-1)/(J•m-2•s-1); ºC). function of daily temperature ((kg•ha-1• hr-1)/(J•m-2•s-1); ºC).

TBASEM Lower threshold temperature for emergence (ºC).TBASEM Lower threshold temperature for emergence (ºC).

TEFFMX Maximum effective temperature for emergence (ºC).TEFFMX Maximum effective temperature for emergence (ºC).

TDWITDWI Initial total crop dry weight (kg•ha-1). Initial total crop dry weight (kg•ha-1).

TSUMEM Thermal time from sowing to emergence (ºC•d-1).TSUMEM Thermal time from sowing to emergence (ºC•d-1).

TSUM1TSUM1 Thermal time from emergence to an thesis (ºC•d-1). Thermal time from emergence to an thesis (ºC•d-1).

TSUM2TSUM2 Thermal time from an Thermal time from an thesis to maturity (ºC•d-1).thesis to maturity (ºC•d-1).



Dependence Dependence between date of between date of sowing (duration of sowing (duration of vegetative period) vegetative period) and yields from and yields from winter wheat in winter wheat in

BulgariaBulgaria (kg/dka)(kg/dka)

Sowing date 1-10 OctSowing date 1-10 Oct



Dependence between Dependence between date of sowing date of sowing (duration of (duration of vegetative period) vegetative period) and yields from and yields from winter wheat in winter wheat in


Sowing date 1 – 10 NovSowing date 1 – 10 Nov





Sowing date 11-20 NovSowing date 11-20 Nov



Simulations was carry out for three Simulations was carry out for three stations Kneja – Northwest stations Kneja – Northwest Bulgaria, Chirpan – Central South Bulgaria, Chirpan – Central South Bulgaria and Dobrich – Northeast Bulgaria and Dobrich – Northeast

BulgariaBulgaria



Main resultsMain results 1. Was established a common research methodology 1. Was established a common research methodology

and selected models and empirical relations for and selected models and empirical relations for estimation of growth and drought impact on productivity estimation of growth and drought impact on productivity of different agricultural crops in agriculture - both in of different agricultural crops in agriculture - both in Austria and Bulgaria; Austria and Bulgaria;

2. Was get knowledge on available publications and 2. Was get knowledge on available publications and related to agrometeorological forecasts and applications related to agrometeorological forecasts and applications of simulation models and indices; of simulation models and indices;

3. Was evaluated and adopted of research methods and 3. Was evaluated and adopted of research methods and approaches recommendations for structure of approaches recommendations for structure of agricultural production and use agroclimatic and agricultural production and use agroclimatic and biological resources zoning preparing. biological resources zoning preparing.



Future collaborationFuture collaboration

Two partners achieve to understanding to continue joint Two partners achieve to understanding to continue joint research in the frame of bilateral scientific project with research in the frame of bilateral scientific project with working title working title “Agroclimatic Resources for Field “Agroclimatic Resources for Field Cultures Cultivation under Natural Conditions in Cultures Cultivation under Natural Conditions in Austria and Bulgaria”.Austria and Bulgaria”.

Projected publications/articlesProjected publications/articles

It is expected results from STSM to be published in few It is expected results from STSM to be published in few scientific papers/ publicationsscientific papers/ publications



Thank you for your attentionThank you for your attention

cost 734, 3-rd mcm clivagri - poznan, poland stsm on calibration and verification of wofost...

Documents

poland stsm

rd mcm clivagri poznan

crop parameters

emergence cd

crop simulation models

wofost model parameters

tsum2 thermal time

tsumem thermal time