Chemical and microbial properties of semiarid tropical soils of short-term fallows in Burkina Faso,West Africa |
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| Authors: | A Bilgo D Masse S Sall G Serpantié J-L Chotte V Hien |
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| Institution: | (1) Institut de l’Environnement et des Recherches Agricoles, Station de Kamboinsé, 01 BP 476 Ouagadougou 01, Burkina Faso;(2) Institut de Recherche pour le Développement, 01 BP 182 Ouagadougou, Burkina Faso;(3) Institut de Recherche pour le Développement, BP 434 101 Antananarivo, Madagascar;(4) Institut de Recherche pour le Développement, BP 1386 Dakar, Senegal;(5) Institut de Recherche pour le Développement, BP 6450 Montpellier, France |
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| Abstract: | In the soudano–sahelian zone of Burkina Faso, the short-term fallow effect on the soil chemical and microbial properties was
evaluated. In four farm experiments, two types of fallows were compared with cultivated fields: a natural vegetation fallow
and a fallow enriched with Andropogon gayanus. After 5 to 7 years of experiments, soil chemical and microbial characteristics were determined in laboratory for 0–10 cm
soil depth. Soil organic carbon (+64%), nitrogen (+35%), microbial biomass (+76%), basal respiration (+141%), and β-glucosidase
activity (+86%) were significantly higher in fallows plots than in cultivated fields. The metabolic quotient was not significantly
different on fallows compared to the cropped plots. Also, no significant difference was highlighted between natural vegetation
fallows and the A. gayanus-enriched one. |
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| Keywords: | Fallow Perennial grass Soil organic matter Soil respiration Burkina Faso |
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