Yield of rice under water and soil salinity risks in farmers’ fields

Autor: Dauphin-Clermont, Marie, Suwannang, N., Grünberger, Olivier, Hammecker, Claude, Maeght, J.L.
Přispěvatelé: Ecologie Fonctionnelle et Biogéochimie des Sols (Eco&Sols), Ecole Nationale Supérieure Agronomique de Montpellier (ENSA M)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro), Office of Science for Land Development, Institut de Recherche pour le Développement (IRD), Laboratoire d'étude des Interactions Sol - Agrosystème - Hydrosystème (UMR LISAH), Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Institut de Recherche pour le Développement, Partenaires INRAE
Jazyk: angličtina
Rok vydání: 2010
Předmět:
Zdroj: Field Crops Research
Field Crops Research, Elsevier, 2010, 118 (3), pp.289-296. ⟨10.1016/j.fcr.2010.06.009⟩
ISSN: 0378-4290
Popis: Corresponding author. E-mail addresses: clermont@ird.fr, ndauphin@yahoo.com; International audience; This study focused on the variability of rice yield under water and soil salinity risks in farmers’ fields in northeast Thailand.Arice plot was monitored in 24, 16 and 11 farmers’ fields during the rice seasons 2005, 2006 and 2007, respectively. The results emphasized that few plots were continuously submerged during the 2005 season, when rainfall was low. Drought significantly affected the rice yield, yield components and the internal efficiency (IE) of the absorbed nutrients, while slight soil salinity had the only significant effect of increasing the IE of potassium (IEK). In the very rainy 2006 and 2007 seasons, most fields were continuously submerged, and in contrast to 2005, the slight soil salinity that was recorded had significant effects not only on IEK, but also on rice yield, spikelet sterility and 1000-grain weight. The yield decrease due to drought was about 87% and that due to salinity was 20%. When neither salinity nor water were limiting, the soil nutrient supply was high enough to achieve about 80% of the maximum yield reported in the literature for the rice cultivar in this area. As both drought and salinity risks are hardly avoided by the current farmers’ management they should be taken into account in the way technical recommendations to farmers are formulated
Databáze: OpenAIRE
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