Impact of wheat/faba bean mixed cropping or rotation systems on soil microbial functionalities

Wahbi Sanâa, Prin Yves, Thioulouse Jean, Sanguin Hervé, Baudoin Ezékiel, Maghraoui Tasnime, Oufdou Khalid, Le Roux Christine, Galiana Antoine, Hafidi Mohamed, Duponnois Robin. 2016. Impact of wheat/faba bean mixed cropping or rotation systems on soil microbial functionalities. Frontiers in Plant Science, 7 (1364), 9 p.

https://doi.org/10.3389/fpls.2016.01364

Article de revue ; Article de recherche ; Article de revue à facteur d'impact Revue en libre accès total

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Quartile : Q1, Sujet : PLANT SCIENCES

Résumé : Cropping systems based on carefully designed species mixtures reveal many potential advantages in terms of enhancing crop productivity, reducing pest and diseases, and enhancing ecological services. Associating cereals and legume production either through intercropping or rotations might be a relevant strategy of producing both type of culture, while benefiting from combined nitrogen fixed by the legume through its symbiotic association with nitrogen-fixing bacteria, and from a better use of P and water through mycorrhizal associations. These practices also participate to the diversification of agricultural productions, enabling to secure the regularity of income returns across the seasonal and climatic uncertainties. In this context, we designed a field experiment aiming to estimate the 2 years impact of these practices on wheat yield and on soil microbial activities as estimated through Substrate Induced Respiration method and mycorrhizal soil infectivity (MSI) measurement. It is expected that understanding soil microbial functionalities in response to these agricultural practices might allows to target the best type of combination, in regard to crop productivity. We found that the tested cropping systems largely impacted soil microbial functionalities and MSI. Intercropping gave better results in terms of crop productivity than the rotation practice after two cropping seasons. Benefits resulting from intercrop should be highly linked with changes recorded on soil microbial functionalities.

Mots-clés Agrovoc : culture intercalaire, diversification, bactérie fixatrice de l'azote, écologie microbienne, rotation culturale, culture en mélange, agroécosystème, mycorhization, fertilisation

Mots-clés géographiques Agrovoc : Maroc

Mots-clés libres : Intercropping, Wheat, Faba, Microbiota

Classification Agris : F08 - Systèmes et modes de culture
P34 - Biologie du sol

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

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