Combining Soil Organic Carbon sequestration and food security in African soils

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  • CombiningSoilOrganicCarbonsequestra4onandfoodsecurityinAfricansoils

    MINISTREDELAGRICULTUREETDELQUIPEMENTRURALINSTITUTSNGALAISDERECHERCHEAGRICOLES

    1

    Maintainingand/orincreasingSOCstocks(fosteringSOCsequestra8on)forclimatechangemi8ga8onandadapta8on,andlanddegrada8onneutrality

    Rome,21-23March2017

    NdyeYacine.Badiane.Ndour;RazafimbeloT;J.L.ChoRe;MBernoux;

  • qAprojec8onoftwobillionpeoplein2050

    2

    Astateofrapidtransi4onintermofdemography

  • Astateofrapidtransi4onintermofdemography

    qAnimportantchangesinmigra8onpaGernsandurbangrowth.

    3Source: UN Urban projections, 2010

  • 4

    ChallengestoAfricanfoodsecurity

    qDomes8cfooddemandpredictedtotripleby2050inSubSaharanAfrica

  • 5

    qDomes8cfooddemandpredictedtotripleby2050inSubSaharanAfrica

    q WhatarethekeyroleofSOILCARBONSEQUESTRATIONforfoodsecurityinAfrica?

    ChallengestoAfricanfoodsecurity

  • HowtoproducesufficientfoodinAfricancontext?

    6

    qAfricahas33millionsfarmsoflessthan2hectares,accoun8ngfor80%ofallfarms

  • 7

    Organiccarbonsequestra4ontoenhanceAfricansoilquality

    qMostofAfricanSoilarecoarsewithlowac8vityclays;deficientinmostnutrients,especiallyNandPandhavingaverylowCa8onExchangeCapacity(CEC).

  • 8

    SoilOrganicmaRerboostsWaterHoldingCapacity

    B.D.Hudson,ina1994

  • EffectofwasterecyclingtoaccessPavailabilityonSSAsoils

    Soumare,M.,etal.,G.(2003 9

  • EffectoforganicmaRerontropicalsoilproduc4vity

    Organicfer4lizers

    Effectoforganicmanureandlocalizedfer4liza4ononahole(Za)ontheproduc4vityofsorghumintheSahelianzone,Bayenetal.

    Grennmanure

    Localmanureapplica4on

    10

  • Organicfer4lizers

    Effectoforganicmanureandlocalizedfer4liza4ononahole(Za)ontheproduc4vityofsorghumintheSahelianzone,Bayenetal.

    Grennmanure

    Localmanureapplica4on

    11

    EffectoforganicmaReronsoilproduc4vity

  • Effectoforganicmanureandlocalizedfer4liza4ononahole(Za)ontheproduc4vityofsorghumintheSahelianzone,Bayenetal.EffectofGreenmanureinmasyield

    Organicfer4lizers

    Grennmanure

    Localmanureapplica4on

    12

    EffectoforganicmaReronsoilproduc4vity

  • qScaleuplocallyrelevantSoilorganiccarbonprac8ces;

    qOvercomesocialconstraintsandreformingeconomicincen8ves

    qImprovemethodsandindicatorsformonitoring,evalua8onandcommunica8on

    qNeedtocombineSoilandWatermanagement,especiallyindryregion

    SOCcanreducelanddegradaConandenhancefoodsecurityinAfrica,howeveritsremainvarious

    challenges,including?

    Challengeforscalinguporganiccarbonsequestra4oninAfricanfarmingsystems

    13

  • Scalinguporganiccarbonsequestra4oninAfricanfarmingsystems

    qTheadop8onofRMPsbysmalltropicsfarmersisnecessaryqMostoftheproposalscomeclosetotheCFSandagroecologyqTheseprac8cesneedtoincreasebiomasscollec8onandreducenutrientlosses

    ?2.3

    Proposedsustainableprac4ces

    .

    14

  • ScalingupSOCsequestra4oninAfricanfarmingsystems

    qTheadop8onofRMPsbysmalltropicsfarmersisnecessaryqMostoftheproposalscomeclosetotheCFSandagroecologyqTheseprac8cesneedtoincreasebiomasscollec8onand

    reducenutrientlosses

    ButincreasingbiomassinSSAsoilalsorequiresotherelements:waterandnutrients.Sowecannottotally

    refrainfrommineralfer4lizing.Butrequireefficientuse 15

    ?2.3

    Proposedsustainableprac4ces

    .

  • qSmallsizeoffarms(onaverage1.5to4ha)qFamilycharacteroffarmqandthelowlevelofcapital

    .NoShort-termbenefits(exemptReturn>50%)

    .Non-availabilityofinputs:Labor

    .LackofCompa8bilitywithSocialFactors

    -Gapbetweentheobjec8vesofinnova8onandthoseofproducers:Sequestra8onC?

    -Costs/Benefitsvs.Prac8ces

    -Extension/LackofAwareness

    Cond

    i4on

    sofn

    on-ado

    p4on

    Causesandreasonsslowing

    downadop4onn

    16

    Overcomesocialconstraintsandreformingeconomicincen4ves

  • qTherulesofaccess,useandmanagementofnaturalresources:Themodeofaccessandmanagementofresourcescanentailacompe88onbetweentheuseofresourcesqTherearestrongtrade-offsforeitheralloca8ngcropresiduesforlivestockfeedorusingthecropresiduesdirectlyformulchtherebyreducingtheamountandqualityofmanureavailableandcompromisingthecondi8onoflivestock

    .

    17

    Overcomesocialconstraintsandreformingeconomicincen4ves

  • ParksFaidherbiaalbida:WestAfricaSenegal

    Mul8pleUsageTree:ReversePhenologyPodsusedorsoldasfodderLegume:contributestothefer8lityoftheland

    Markets for agroforestry tree products are critical to the adoption of FA to have significant economic, social and environmental impacts

    Thedenseshadeofsheatrees(Vitellariaparadoxa)reducestheyieldofmilletby50%,butthesetreesareneverthelessusedbecauseofthehigheconomicyieldsoftheirmarketableproducts.

    ParksSchea:WestAfrica:BurkinaFaso

    ParcVitellaria

    BeurredeKarit

    18

    Reformsinlandrightsandpaymentsystemsforecosystemservicescanencourageands4mulatethedevelopmentofplanta4ons(Forestandagroforestryparks).

  • Semi-intensive

    breeding

    ORGANICMANURE

    DOMESTICBIOGAS

    Reducespressureonbiomassuse

    ReducedGHGemissions

    Feedforlivestock

    19

    Needstohavesynergiesbetweenini4a4vesForsustainabilityoffarms

  • Acarbonmanagementpolicyinvolvingasoilcarbontradingmarketisnecessary

    MethodologyforCalcula8onofEcosystemServices(Sequestra8onC)

    Howtoorganizesmallproducers?

    Requirementtohaveabaseline/reference:beGerknowledgeofAfricansoilsEstablishmentofanevalua8onmethodologyandeffec8vemeansofverifica8on

    20

    Someimportantpointstotakeintoaccount...

  • Ini4a4ve4PM

    21

    hRp://reseau-carbone-sol-afrique.org

    THANK FOR YOUR ATTENTION

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