Although thebenefitsofsilicon(Si)fertilizationforsugarcaneyieldshavealreadybeendemonstrated,fewstudies haveexaminedtheeffectsofsilicatefertilizationappliedatlessthan200kgha−1 Si inthefurrowat plantingonthesolubleSiconcentrationinthesoils,plantuptakeinsugarcane(aSi-accumulatingcrop) anddamagecausedbythestalkborer(Diatraea saccharalis) underfieldconditions.Theobjectiveof thisstudywastoevaluatetheeffectsofaCa–Mgsilicatethatwasappliedinthefurrowatplantingon theavailableSiinthesoil,sugarcaneyieldsandstalkborerdamageoftwosugarcanecultivarsunderfield conditions.Twoexperimentswereconductedontwosoiltypeswithalowsiliconcontent(aTypicQuartzipsamment-Q andaRhodicHapludox-RH)usingacompletelyrandomizedfactorialschemedesignwith fourreplicates,fourSiapplicationrates(0,55,110and165kgha−1 Si) andtwocultivars(IAC86-3396and SP891115).Ca–Mgsilicatewasappliedduringfurrowplantingsuchthatallplotsreceivedthesamequantity ofCaandMg.Onbothofthesoiltypes,silicatefertilizationincreasedtheSiconcentrationsinthesoil andtheleavesoftheplantsat8monthsforboththeplantcaneandthefirstratoon,therebyshowingresidual effects.Additionally,thepotentialforsiliconfertilizationappliedinthefurrowatplantingtoreduce stalkborer(D. saccharalis) damagewasconfirmedforstalkSiconcentrationsthatweregreaterthan 3gkg−1 Si asshownintheRHsoilexperiment.Therefore,thepracticeofsilicateplacementatlowrates (<200kgha−1 Si) inthefurrowatplantingshouldbeconsideredanalternativemethodofnutritionalmanagement forsugarcaneinsandyandloamsandysoilswithadditionalbenefitsofincreasedsoluble
Si inthesoil,Siuptakeandsugarcaneyieldandmayhelpreducethestalkborerdamageof D. saccharalis.
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