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| Content Provider | African Journals Online (AJOL) |
|---|---|
| Author | DRR Bivoko SL Ahonzo-Niamke A Zeze |
| Abstract | En Côte d’ Ivoire, la baissede la fertilité des terres de culture du manioc, est à l’origine des rendements faibles. L’utilisation de l’effet bénéfique des champignons mycorhiziens arbusculaires (CMA) pourrait améliorer durablement ces rendements. Ce travail a pour but de mettre en évidence l’écologie, la diversité et la structuration des communautés de CMA endogènes associés à la culture du manioc dans les sols de la zone agroécologique d’Azaguié. Les études ont été menées à partir des sols de champs de manioc (Ahoua 1, Ahoua 2, Mbromé 1, Mbromé 2). Ces sols étaient très acides (pH inférieurs à 5,17), pauvres en bases échangeables (CEC inférieures à 17,1 cmol/kg), en phosphore assimilable (P. assimilable inférieur à 30,71 ppm) et en matière organique. Il a été dénombré 44 espèces de CMA reparties en treize genres. Les genres Glomus (55,17 %) et Acaulospora (30,14 %) sont les plus abondants. Les densités des spores de CMA, sont inférieures à 14,68 spores.g-1. La proportion moyenne de spores non-viables (55 %) est élevée. Il a été noté des corrélations positives entre les communautés de CMA et le magnésium (R = 0,65), la CEC (R = 0,69), l'argile (R = 0,74) et le limon grossier (R = 0,79). Par contre des corrélations négatives ont été obtenues avec le sable fin (R = -0,60) et le sable grossier (R = -0,59).Mots clés : Manioc, Azaguié, Côte d’Ivoire, champignons mycorhiziens à arbuscules.INFLUENCE OF CASSAVA SOILS PHYSICOCHEMICAL PROPERTIES ONTHE ABUNDANCE AND DIVERSITYOF ARBUSCULAR MYCORRIZAL FUNGI COMMUNITIES’ IN AZAGUIÉ AGROECOLOGICAL AREA, SOUTH-EAST CÔTE D’IVOIREIn Côte d’Ivoire, the decline in cassava soil fertility is causing low yields. The use of the beneficial effect of arbuscular mycorrhizal fungi (AMF) can sustainably improve the yields. The aim of this study was to highlight the ecology, diversity and community structure of endogenous CMA associated with cassava. The studies were conducted using cassava field soils (Ahoua 1 Ahoua 2 Mbromé 1 Mbromé 2). These soils were very acidic (pH less than 5.17), with low exchangeable bases capacities values (CEC less than 17.1 cmol / kg), low available phosphorus levels (available P less than 30.71 ppm) and poor organic matter proportions. Thirteen AMF genera comprising 44 species were identified. The genera Glomus (55.17 %) and Acaulospora (30.14 %) were the most abundant. AMF spores densities were (8.42 and 14.68 spores.g-1). The proportion of non-healthy spores was 55 %. There were positive correlations between AMF communities and magnesium (R = 0.65 and 0.59), CEC (R = 0.69), clay (R = 0.74) and coarse silt (R = 0.79) and negative correlations were obtained with fine sand (R = -0.60) and coarse sand (R = -0.59).Key words : Cassava, Azaguié Côte d’Ivoire, abuscular mycorrhiral fungi. |
| Ending Page | 264 |
| Starting Page | 251 |
| File Format | |
| e-ISSN | 10152288 |
| Journal | Agronomie Africaine |
| Issue Number | 3 |
| Volume Number | 25 |
| Language | English French |
| Publisher Date | 2014-02-06 |
| Access Restriction | Open |
| Subject Keyword | Agriculture Food Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Agricultural and Biological Sciences |
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