Effet des amendements organiques sur le développement du riz (Oryza sativa L.) dans les bas-fonds sulfato-acides en zone sud-soudanienne au Sénégal.
Year: 2019
Type: article
Abstract: Objectives: Paddy rice acidification leads to an excessive release of ferrous iron causing the iron toxicity of rice which limits rice yield.Adding organic amendment could improve rice yield.This study was done to determine the effect of organic amendments on rice development in acid ferruginous lowlands.Methodology and results: A split-plot design was set up in the area with iron toxicity (Tox zone) and in the area without iron toxicity (Stox zone) with three amendments (biochar, compost, and control) and 4 varieties of rice.In the Tox zone, after 90 days, compost amendment led to a drop in pH: 3.93 for the 0-10 cm horizon and 3.89 for the 10-30 cm horizon; however, the number of tillers increased (p <0.01).In the Tox zone, the supply of biochar significantly increased the average height of the Suakoko 8 variety (p <0.01).Conclusions and application of the results: The use of compost, although having led to an increase in the number of tillers, should be done carefully and be accompanied, if possible, by material such as ash, which raises the pH in rice fields.It would also be interesting to follow the long-term effect of biochar in rice fields.Amendments of compost and biochar could in the long run increase the pH of rice fields and thus make the nutrients available to the plant; this will contribute to better rice yields.
Source: Journal of Applied Biosciences
DOI: 10.35759/jabs.144.11
Language: French
Subfield: Soil Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W3013606548