@article{fdi:010093333, title = {{B}iochar and plant growth-promoting bacteria boost chemical and biological properties of semiarid soil in cowpea}, author = {{A}raujo, {I}. {D}. and {M}artins, {A}. {P}. and da {C}osta, {D}. {P}. and {S}ilva, {A}. {O}. and da {F}ran{\c{c}}a, {R}. {F}. and {L}ira, {M}. {D}., {J}r. and {D}uda, {G}. {P}. and {L}ima, {J}. {R}. {D}. and da {S}ilva, {M}. {M}. and {A}raujo, {A}. {S}. {F}. and {H}ammecker, {C}laude and {M}edeiros, {E}. {V}. {D}.}, editor = {}, language = {{ENG}}, abstract = {{P}lant growth-promoting bacteria ({PGPB}) are an effective tool for improving nutrients in agricultural systems; however, their efficacy depends on successful colonization in soils. {T}o address this challenge, biochar has been identified as an effective material for enhancing soil ecosystem services and can serve as a protective for {PGPB}. {H}owever, the impact of biochar and {PGPB} on soil health indicators and plant growth remains poorly understood. {T}his study aimed to evaluate the effects of biochar and {PGPB} on soil chemical and biological properties in cowpea. {W}e used biochar from bean husk ({BHB}) and grape fermentation residue ({GFB}) and {B}radyrhizobium elkanii {USDA} 76 ({BRA}), {B}urkholderia cepacia {ATCC} 25416 ({PRB}), or {R}hizobium altiplani {BR}10423 ({RHI}). {BHB} and {PRB} stimulated cowpea growth, while {GFB} and {PRB} promoted soil phosphatase activity. {O}verall, different combinations of biochar and {PGPR} increased soil p{H}, phosphorus, potassium, organic carbon content, and urease activity, but did not affect microbial biomass carbon and beta-glucosidase activities. {T}he biochars inoculated with the {BRA} showed the highest productivity. {F}or example, plants subjected to the {BRA} + {GFB} treatment exhibited a 3.85-fold increase in productivity compared to the additional treatment that involved the use of commercial peat. {T}he study demonstrated a positive effect of biochar and {PGPB} on soil enzymatic activity, nutrient content, and cowpea growth suggesting a sustainable alternative to chemical fertilizers, especially in poor soils. {T}hese findings highlight the potential of biochar as an environmentally sustainable carrier of {PGPB} while addressing the issue of agricultural waste reuse.}, keywords = {circular economy ; {PGPB} ; environmentally friendly ; enzyme activities}, booktitle = {}, journal = {{S}oil {S}ystems}, volume = {9}, numero = {1}, pages = {19 [11 p.]}, year = {2025}, DOI = {10.3390/soilsystems9010019}, URL = {https://www.documentation.ird.fr/hor/fdi:010093333}, }