%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Latati, M.
%A Blavet, Didier
%A Alkama, N.
%A Laoufi, H.
%A Drevon, J. J.
%A Gerard, F.
%A Pansu, Marc
%A Ounane, S. M.
%T The intercropping cowpea-maize improves soil phosphorus availability and maize yields in an alkaline soil
%D 2014
%L fdi:010063509
%G ENG
%J Plant and Soil
%@ 0032-079X
%K P availability ; Intercropping ; Biological N-2-fixation ; Rhizosphere ; acidification
%K ALGERIE
%M ISI:000345283400013
%N 1-2
%P 181-191
%R 10.1007/s11104-014-2214-6
%U https://www.documentation.ird.fr/hor/fdi:010063509
%> https://www.documentation.ird.fr/intranet/publi/depot/2015-02-06/010063509.pdf
%V 385
%W Horizon (IRD)
%X Aim This study assessed whether growing cowpea can increase phosphorus (P) availability in the rhizosphere and improve the yield of legume-cereal systems. In alkaline Mediterranean soils with P deficiency, it is assumed that legumes increase inorganic P availability. Methods A field experiment was conducted at the Staoueli experimental station, in Algiers province, Algeria, to compare the growth, grain yield, P availability, and P uptake by plants with sole-cropped cowpea (Vigna unguiculata L. cv. Moh Ouali) and maize (Zea mays L. cv. ILT), intercropped cowpea-maize, and fallow. Results P availability in the rhizosphere was increased in both sole cropping and intercropping systems compared with fallow. It was highest in intercropping. The increase in P availability was associated with (i) significant pH changes of the rhizosphere of cowpea in sole cropping and intercropping systems, with the rhizosphere acidification significantly higher in intercropping (-0.73 units) than in sole cropping (-0.42 units); (ii) significant increase in the rhizosphere pH of intercropped maize (+0.49 units) compared to fallow; (iii) increased soil respiration (C-CO2 from microbial and root activity) in intercropping compared with sole cropping and fallow; and (iv) higher efficiency in utilization of the rhizobial symbiosis in intercropping than in sole-cropped cowpea. Conclusion With cowpea-maize intercropping, cowpea increased the P uptake, by increasing the P availability by rhizosphere pH changes in an alkaline soil. Overall, this study showed that intercropping cowpea improved the plant biomass and grain yield of maize in this soil.
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