Programme Poster session 3
DIRECT SEEDING INTO MULCH SYSTEM AND CLIMATE
CHANGE, A CASE STUDY IN THE SOUTH OF FRANCE
Author(s): Reza Khaledian
change, direct seeding, irrigation demand
Session: Poster session 3
DIRECT SEEDING INTO MULCH SYSTEM AND CLIMATE CHANGE, A CASE STUDY IN THE
SOUTH OF FRANCE
M.R. Khaledian1,2, J.C. Mailhol1, P. Ruelle1, J.M. Gonzalez-Camacho1,3, D.
1) UMR G-EAU Cemagref-Cirad-Engref-IRD, BP 5095, 34196 Montpellier Cedex 05 France
Guilan University of Iran; email:firstname.lastname@example.org
3) Colegio de Postgraduados, Montecillo,
In response to the negative impact of soil degradation under conventional cropping systems with
tillage, direct seeding into mulch without tillage and with a cover crop is being developed. Apart from the positive
effects on the soil conservation, sustained land production and dropped labour costs, another major impact of direct
seeding into mulch is CO2 mitigation due to better carbon sequestration.
The aim of the research reported here
was to assess local impacts of increasing of CO2 rate on irrigation demand and water efficiency at the Lavalette
experimental station. There are two tillage treatments in this study i.e. direct seeding into mulch and conventional
tillage. A field experiment was established at Lavalette experimental station (43° 40’ N, 3° 50’ E, altitude 30 m) in
Montpellier in the South of France. There is a weather station at the experimental station. Climate variable were
introduced into the stochastic weather generator, LARS-WC, to simulate local daily climate scenarios for present
CO2 level and future CO2 level (increased CO2 level).
The STICS crop model was used after calibration and
validation at Lavalette to simulate the direct and indirect effects of increasing atmospheric CO2 on irrigation demand
and crop production. Several simulation conditions were studied for current climate and future climate scenarios.
Principal results show that global warming increases irrigation demand and reduces the production.