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La baisse de fertilite la des sols dans le Sud-Benin et le cout eleve des engrais chimiques, ainsi que les dangers lies a leur mauvaise utilisation, amenent les producteurs a rechercher une fertilisation alternative et durable. Ainsi, deux types de compost a base de fientes de volailles et de dejections d’ovins ainsi que le guano ont ete testes afin d’evaluer leur effet sur les proprietes chimiques du sol et le rendement de la carotte ( Daucus carota L.). Le dispositif experimental etait un split plot a quatre repetitions avec les engrais organiques comme facteur principal puis trois doses d’application et un controle (0, 20, 30 et 40 t/ha) comme facteur secondaire. L’apport des differentes formes d’engrais organiques ainsi que les doses d’application ont eu des effets tres hautement significatifs (P<0,001) sur le pH (eau) ainsi que sur la teneur du sol en carbone organique, en phosphore assimilable et en calcium echangeable apres la recolte. Le compost enrichi aux fientes de volailles a significativement contribue a l’augmentation du rendement de carottes comparativement au guano avec une moyenne globale de 24,24±1,34 t/ha de carottes fraiches contre 18,93±1,68 t/ha pour le guano. Le compost enrichi avec les fientes de volailles a induit des niveaux de rendements de carottes significativement eleves aux doses de 30 et 40 t/ha. Le compost enrichi avec les fientes de volailles pourrait etre recommande pour la production de la carotte a la dose de 30 t/ha. © 2017 International Formulae Group. All rights reserved. Mots cles: Agriculture biologique, compost, Daucus carota L., guano, Benin English Title: Effect of organic manure on ferralitic soil and carrot ( Daucus carota L.) production in southern Benin English Abstract The decline in soil fertility in southern Benin and the high cost of chemical fertilizers, as well as the dangers associated with their misuse, lead producers to seek alternative and sustainable fertilization. So, guano and two types of compost enriched with chicken and sheep dejections were tested in order to evaluate their effect on soil chemical properties and yield of carrots ( Daucus carota L.) The experimental design was a split plot with four replications, organic manures were the main factors and the rates of organic manures applied (0, 20, 30 and 40 t/ha) were sub factors. The results showed that the different sources of organic manure and the rates of their application had a significant effect (P<0.001) on pH (water), available phosphorus, organic carbon and exchangeable calcium after the carrots harvested. Compost enriched with chicken dejection has increased significantly (P< 0.01) the yield of fresh carrots (24.24±1.60 t/ha) compared with the guano (18.93±1.68 t/ha). Moreover, the compost enriched with chicken dejection allowed high yields of fresh carrots with the application rates of 30 and 40 t/ha. The compost enriched with chicken dejection is recommended for carrots production at the rate of 30 t/ha. © 2017 International Formulae Group. All rights reserved. Keywords: Biological agriculture, compost, Daucus carota L., guano, Benin

international journal of biological and chemical sciences

Effet de l’apport de différents types d’engrais organiques sur la fertilité du sol et la production de la carotte (&lt;i&gt;Daucus carota&lt;/i&gt; L.) sur sol ferralitique au sud Bénin