Skip to Main content Skip to Navigation
Master Thesis

Étude du risque climatique en riz pluvial et de ses interactions avec les systèmes de culture dans la région du Lac Alaotra

Abstract : In the area of Alaotra Lake in Madagascar the rising demographic pressure leads to an overexploitation, causing an important erosion of slope plots and an loss of soil fertility. Other problems like access to phytosanitary substances andinstability of yields due to climatic variability pose a threat to rice productivity, main culture of this country. Directseeding mulch-based cropping (DMC) systems have solutions to those problems. There are based on three fundamental pillars: no-till of soils, appropriated rotation of cultures and presence of permanent mulch on the ground. Their effectiveness has already been proved in different parts of the world but few studies have been made in the area of Alaotra Lake, where there is a specific climate. The aim of this study is to model rice culture in this area thanks to PYE model. Trial plots cultivated in this region will be used to calibrate the model. In this context Rice crops will be simulated over 18 years from a climatic series taken in the Lake region. It will permit to compare the sensibility of different crop systems to hydric stress observed in the region. Results show that conservation agriculture doesn't lead to better yields, except on plots where runoff levels are very high.
Document type :
Master Thesis
Complete list of metadata

Cited literature [30 references]  Display  Hide  Download

https://dumas.ccsd.cnrs.fr/dumas-00873780
Contributor : Agrocampus Ouest <>
Submitted on : Wednesday, October 16, 2013 - 2:00:37 PM
Last modification on : Monday, July 6, 2020 - 3:38:21 PM
Long-term archiving on: : Friday, January 17, 2014 - 4:40:28 AM

Identifiers

  • HAL Id : dumas-00873780, version 1

Collections

Citation

Thomas Abrell. Étude du risque climatique en riz pluvial et de ses interactions avec les systèmes de culture dans la région du Lac Alaotra. Sciences agricoles. 2013. ⟨dumas-00873780⟩

Share

Metrics

Record views

168

Files downloads

2442